MIC2563A-0BSMT&R - Micrel, Inc.

March 2004 1 M9999-033004

MIC2563A Micrel

MIC2563A

Dual-Slot PCMCIA/CardBus Power Controller

Features

• Single package controls two PC Card slots

• High-efficiency, low-resistance switches require no

12V bias supply

• No external components required

• Output current limit and overtemperature shutdown

• Ultra-low power consumption

• Complete dual-slot PC Card/CardBus VCC and VPP

switch matrix in a single package

• Logic compatible with industry standard PC Card logic

controllers

• No voltage shoot-through or switching transients

• Break-before-make switching

• Digital selection of VCC and VPP voltages

• Over 1A VCC output current for each section

• Over 250mA VPP output current for each section

• Lead-free 28-pin SSOP package

• UL recognized, file #179633

Applications

• Dual-slot PC card power supply pin voltage switch

• CardBus slot power supply control

• Data collection systems

• Machine control data input systems

• Wireless communications

• Bar code data collection systems

• Instrumentation configuration/datalogging

• Docking stations (portable and desktop)

• Power supply management

• Power analog switching

General Description

The MIC2563A dual-slot PCMCIA (Personal Computer

Memory Card International Association) and CardBus power

controller handles all PC Card slot power supply pins, both

VCC and VPP. The MIC2563A switches between the three

VCC voltages (0V, 3.3V and 5.0V) and the VPP voltages (OFF,

0V, 3.3V, 5V or 12.0V) required by PC Cards. The MIC2563A

switches voltages from the system power supply to VCC and

VPP. Output voltage is selected by two digital inputs each and

output current ranges up to 1A for VCC and 250mA for VPP.

The MIC2563A provides power management capability con-

trolled by the PC Card logic controller. Voltage rise and fall

times are well controlled. Medium current VPP and high

current VCC output switches are self-biasing:

no +12V sup-

ply is required for 3.3V or 5V output.

The MIC2563A is designed for efficient operation. In standby

(sleep) mode, the device draws very little quiescent current,

typically 0.3µA. The device and PCMCIA port is protected by

current limiting and overtemperature shutdown. Full cross-

conduction lockout protects the system power supplies dur-

ing switching operations.

The MIC2563A is an improved version of the MIC2563,

offering lower on-resistances and a VCC pull-down clamp in

the OFF mode. It is available in a standard 28-pin SSOP, as

well as an environmentally friendly (lead-free) 28-pin SSOP.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Typical Application

System

Power

Supply

PCMCIA

Card Slot

Controller

MIC2563

PCMCIA

Card Slot

(opt)

12V

(opt)

A EN0

A EN1

VPP1

VCC

VPP IN

(opt) VCC5 IN

(opt)

VCC3 IN

A VCC5_EN

A VCC3_EN

VPP2

PCMCIA

Card Slot

VPP1

VCC

VPP2

B EN0

B EN1

B VCC5_EN

B VCC3_EN

PCMCIA

Card Slot

3.3V

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com

UL Recognized Component

MIC2563A Micrel

M9999-110503 2 March 2004

Pin Configuration

Connect all pins with the same name together for proper operation.

28-Pin SSOP (SM)

B VCC OUT B VCC5 IN1712

NC GND1811

B VCC OUT B VCC5 IN1514

B VCC3 IN B VCC OUT1613

1A VCC5 IN

A VCC OUT

A VCC5 IN

GND

A VCC5_EN

A VCC3_EN

A EN0

A EN1

B VPP IN

B VPP OUT

28 A VCC OUT

A VCC3 IN

A VCC OUT

A VPP OUT

A VPP IN

B EN1

B EN0

B VCC3_EN

B VCC5_EN

MIC2563A-1 Redefined Pin Assignment

Some pin names for the MIC2563A-1 are different from the

MIC2563A-0. This table shows the differences. All other pin

names are identical to the MIC2563A-0 as shown in the “Pin

Configuration,” above.

Ordering Information

Part Number Temperature Range Package Lead-Finish

MIC2563A-0BSM –40°C to +85°C 28-pin SSOP Standard

MIC2563A-1BSM –40°C to +85°C 28-pin SSOP Standard

MIC2563A-0YSM –40°C to +85°C 28-pin SSOP Lead-free

MIC2563A-1YSM –40°C to +85°C 28-pin SSOP Lead-free

Note: See “MIC2563A-0 and MIC2563A-1 Control Logic Table“ for a description of the

differences between the logic options.

Function Pin Number

Slot A Slot B

VPP_VCC 721

VPP_PGM 822

March 2004 3 M9999-033004

MIC2563A Micrel

Electrical Characteristics(3)

VCC3 IN = 3.3V, VCC5 IN = 5.0V, VPP IN = 12V; TA = 25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted.

Symbol Parameter Condition Min Typ Max Units

Digital Inputs

VIH Logic 1 Input Voltage 2.2 7.5 V

VIL Logic 0 Input Voltage –0.3 0.8 V

IIN Input Current 0V < VIN < 5.5V ±1µA

VPP Output

IPP OUT High Impedance Output Shutdown mode 1 10 µA

Hi-Z Leakage Current 0 ≤ VPP OUT ≤ 12V

IPPSC Short Circuit Current Limit VPP OUT = 0 0.2 0.3 A

ROSwitch Resistance Select VPP OUT = 5V 1.8 2.5 Ω

Select VPP OUT = 3.3V 3.3 5

IPP OUT = –100mA (Sourcing)

ROSwitch Resistance, VPP IN = 12V 0.6 1 Ω

Select VPP OUT = 12V IPP OUT = –100 mA (Sourcing)

ROSwitch Resistance, Select VPP OUT = clamped to ground 2500 3900 Ω

Select VPP OUT = 0V IPP OUT = 50µA (Sinking)

VPP Switching Time (See Figure 1)

t1Output Turn-On Delay(4) VPP OUT = Hi-Z to 10% of 3.3V 5 50 µs

t2VPP OUT = Hi-Z to 10% of 5V 10 50 µs

t3VPP OUT = Hi-Z to 10% of 12V 70 250 µs

t4Output Rise Time(4) VPP OUT = 10% to 90% of 3.3V 100 200 800 µs

t5VPP OUT = 10% to 90% of 5V 100 300 1000 µs

t6VPP OUT = 10% to 90% of 12V 100 225 800 µs

t7Output Transition Timing(4) VPP OUT = 3.3V to 90% of 12V 100 250 1000 µs

t8VPP OUT = 5V to 90% of 12V 100 200 800 µs

t9VPP OUT = 12V to 90% of 3.3V 100 200 800 µs

t10 VPP OUT = 12V to 90% of 5V 100 350 1200 µs

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating. Devices are ESD sensitive. Handling precautions recommended.

3. Specification for packaged product only.

4. RL = 100Ω connected to ground.

5. Delay from commanding Hi-Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown conditions.

Operating Ratings(2)

Ambient Temperature (TA)......................... –40°C to +85°C

Operating Temperature (Die) .................................... 125°C

Package Thermal Resistance (θJA)

SSOP ..................................................................84°C/W

Absolute Maximum Ratings(1)

Supply Voltage, VPP IN ...............................................+15V

VCC3 IN...................................................................+7.5V

VCC5 IN...................................................................+7.5V

Logic Input Voltages..................................... –0.3V to +10V

Output Current (each output)

VPP OUT............................... >200mA, Internally Limited

VCC OUT ..................................... >1A, Internally Limited

Power Dissipation (PD), TA ≤ 25°C ..........Internally Limited

SSOP ..................................................................800mW

Derating Factors (to Ambient)

SSOP .................................................................4mW/°C

Lead Temperature (5 sec.)........................................ 260°C

Storage Temperature (TS) .......................–65°C to +150°C

MIC2563A Micrel

M9999-110503 4 March 2004

Symbol Parameter Condition Min Typ Max Units

VPP Switching Time (See Figure 1) continued

t14 Output Turn-Off Delay Time(4, 5) VPP OUT = 3.3V to Hi-Z 200 1000 ns

t15 VPP OUT = 5V to Hi-Z 200 1000 ns

t16 VPP OUT = 12V to Hi-Z 200 1000 ns

t11 Output Turn-Off Fall Time(4) VPP OUT = 90% to 10% of 3.3V 50 1000 ns

t12 VPP OUT = 90% to 10% of 5V 50 1000 ns

t13 VPP OUT = 90% to 10% of 12V 300 2000 ns

VCC Output

ICCSC Short Circuit Current Limit VCC OUT = 0 1 1.5 A

ROSwitch Resistance Select VCC OUT = 3.3V 100 150 mΩ

ICC OUT = –1A (Sourcing)

Select VCC OUT = 5V 70 100 mΩ

ICC OUT = –1A (Sourcing)

Select VCC OUT = clamped to ground 500 3900 Ω

ICC OUT = 0.1mA (Sinking)

VCC Switching Time (See Figure 2)

t1Output Turn-On Delay Time(6) VCC OUT = 0V to 10% of 3.3V 300 1500 µs

t2VCC OUT = 0V to 10% of 5.0V 750 3000 µs

t3Output Rise Time(6) VCC OUT = 10% to 90% of 3.3V 200 700 2500 µs

t4VCC OUT = 10% to 90% of 5V 200 1500 6000 µs

t7Output Turn-Off Delay(6, 7) VCC OUT = 3.3V 2.4 8 ms

t8VCC OUT = 5V 2.8 8 ms

t5Output Fall Time(6) VCC OUT = 90% to 10% of 3.3V 100 240 1000 µs

t6VCC OUT = 90% to 10% of 5.0V 100 600 2000 µs

Power Supply

ICC5 VCC5 IN Supply Current (5V) VCC OUT = 5V or 3.3V, ICC OUT = 0 8 50 µA

VCC OUT = 0V (Sleep Mode) 0.2 10 µA

ICC3 VCC3 IN Supply Current (3.3V)(8) VCC OUT = 5V or 3.3V, ICC OUT = 0 40 100 µA

VCC OUT = 0V (Sleep Mode) 0.1 10 µA

IPP IN VPP IN Supply Current (12V)(9) VPP OUT = 3.3V or 5V, IPP OUT = 0 0.3 4 µA

VPP OUT = Hi-Z, 0 or VPP 0.3 4 µA

VCC5 Operating Input Voltage (5V) VCC5 IN not required for operation 5.0 6 V

VCC3 Operating Input Voltage (3.3V)(8) 3.0 3.3 6 V

VPP IN Operating Input Voltage (12V) VPP IN not required for operation(10) 12.0 14.5 V

Thermal Shutdown

TSD Thermal Shutdown Temperature 130 °C

Notes:

4. RL = 100Ω connected to ground.

5. Delay from commanding Hi-Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown conditions.

6. RL = 10Ω connected to ground.

7. Delay from commanding Hi-Z or 0V to beginning slope. Does not apply to current limit or overtemperature shutdown conditions.

8. The MIC2563A uses VCC3 IN for operation. For single 5V supply systems, connect 5V to both VCC3 IN and VCC5 IN. See “Applications Information”

section for further details.

9. VPP IN is not required for operation.

10. VPP IN must be either high impedance or greater than or approximately equal to the highest voltage VCC in the system. For example, if both 3.3V

and 5V are connected to the MIC2563A, VPP IN must be either 5V, 12V, or high impedance.

March 2004 5 M9999-033004

MIC2563A Micrel

AB CD

VPP

Enable

VPP

Output

VPP to 3.3V VPP to 12V

12V

3.3V

VPP to 5V

VPP

OFF VPP to 12V VPP OFF

EF G JH

t13

VPP OFF

VPP to 5VVPP to 3.3VVPP to 12V

t14

t11

t8t10

t15

t12

t16

Figure 1. MIC2563A VPP Timing Diagram

VPP Enable is shown generically: refer to “MIC2563A-0 and MIC2563A-1 Control Logic Tables.” At time “A,” VPP = 3.3V is

selected. At “B,” VPP is set to 12V. At “C,” VPP = 3.3V (from 12V). At “D,” VPP is disabled. At “E,” VPP is programmed to 5V.

At “F,” VPP is set to 12V. At “G,” VPP is programmed to 5V. At “H,” VPP is disabled. At “J,” VPP is set to 12V. And at “K,” VPP

is again disabled. RL = 100Ω for all measurements. Load capacitance is negligible.

ABC D

t3t7t5

t8t6

VCC

Enable

VCC

Output

VCC to 3.3V VCC to 5VVCC OFF VCC OFF

3.3V

Figure 2. MIC2563A VCC Timing Diagram

VCC Enable is shown generically: refer to “MIC2563A-0 and MIC2563A-1 Control Logic Tables” for specific control logic input.

At time “A,” VCC is programmed to 3.3V. At “B,” VCC is disabled. At “C,” VCC is programmed to 5V. And at “D,” VCC is disabled.

RL = 10Ω.

MIC2563A Micrel

M9999-110503 6 March 2004

MIC2563A-0 Control Logic Table

VCC5_EN VCC3_EN EN1 EN0 VCC OUT VPP OUT

0000Clamped to Ground High-Z

0001Clamped to Ground High-Z

0010Clamped to Ground High-Z

0011Clamped to Ground Clamped to Ground

0100 3.3 High-Z

0101 3.3 3.3

0110 3.3 12

0111 3.3Clamped to Ground

1000 5 High-Z

1001 5 5

1010 5 12

1011 5Clamped to Ground

1100 3.3 High-Z

1101 3.3 3.3

1110 3.3 5

1111 3.3Clamped to Ground

MIC2563A-1 Control Logic Table

(compatible with Cirrus Logic CL-PD6710 & PD672x-series Controllers)

VCC5_EN VCC3_EN VPP_PGM VPP_VCC VCC OUT VPP OUT

0000Clamped to Ground Clamped to Ground

0001Clamped to Ground High-Z

0010Clamped to Ground High-Z

0011Clamped to Ground High-Z

0100 5Clamped to Ground

0101 5 5

0110 5 12

0111 5 High-Z

1000 3.3Clamped to Ground

1001 3.3 3.3

1010 3.3 12

1011 3.3 High-Z

1100Clamped to Ground Clamped to Ground

1101Clamped to Ground High-Z

1110Clamped to Ground High-Z

1111Clamped to Ground High-Z

March 2004 7 M9999-033004

MIC2563A Micrel

Logic Block Diagram

A VCC5_EN

A VCC3_EN

A VCC3 IN

A EN1

A V OUT

A VPP IN

(optional)

A EN0

A VCC5 IN

MIC2563

Section A

Control

Logic

ILIMIT

/ Thermal

Shutdown

Gate Drive

Generator

B VCC5_EN

B VCC3_EN

VCC3 IN

B EN1

GND

B V OUT

B VPP IN

(optional)

B EN0

VCC5 IN

MIC2563

Section B

Control

Logic

ILIMIT

/ Thermal

Shutdown

Gate Drive

Generator

MIC2563A Micrel

M9999-110503 8 March 2004

Applications Information

PC Card power control for two sockets is easily accomplished

using the MIC2563A PC Card/CardBus slot VCC and VPP

power controller IC. Four control bits per socket determine

VCC OUT and VPP OUT voltage and standby/operate mode

condition. VCC outputs of 3.3V and 5V at the maximum

allowable PC Card current are supported. VPP OUT output

voltages of VCC (3.3V or 5V), VPP, 0V, or a high impedance

state are available. When the VCC clamped to ground condi-

tion is selected, the device switches into “sleep” mode and

draws only nanoamperes of leakage current. Full protection

from hot switching is provided which prevents feedback from

the VCC OUT (from 5V to 3.3V, for example) by locking out the

low-voltage switch until the initial switch’s gate voltage drops

below the desired lower VCC.

The MIC2563A operates from the computer system’s main

power supply. Device logic and internal MOSFET drive is

generated internally by charge pump voltage multipliers

powered from VCC3 IN. Switching speeds are carefully con-

trolled to prevent damage to sensitive loads and meet all PC

Card Specification timing requirements.

Supply Bypassing

External capacitors are not required for operation. The

MIC2563A is a switch and has no stability problems. For best

results however, bypass VCC3 IN, VCC5 IN, and VPP IN inputs

with 1µF capacitors to improve output ripple. As all internal

device logic and comparison functions are powered from the

VCC3 IN line, the power supply quality of this line is the most

important, and a bypass capacitor may be necessary for

some layouts. Both VCC OUT and VPP OUT pins may use

0.01µF to 0.1µF capacitors for noise reduction and electro-

static discharge (ESD) damage prevention.

PC Card Slot Implementation

The MIC2563A is designed for full compatibility with the

PCMCIA PC Card Specification, (March 1995), including the

CardBus option.

When a memory card is initially inserted, it should receive

VCC (either 3.3V ± 0.3V or 5.0V ±5%). The initial voltage is

determined by a combination of mechanical socket “keys”

and voltage sense pins. The card sends a handshaking data

stream to the controller, which then determines whether or

not this card requires VPP and if the card is designed for dual

VCC. If the card is compatible with and desires a different VCC

level, the controller commands this change by disabling VCC,

waiting at least 100ms, and then re-enabling the other VCC

voltage.

VCC switches are turned ON and OFF slowly. If commanded

to immediately switch from one VCC to the other (without

turning OFF and waiting 100ms first), enhancement of the

second switch begins after the first is OFF, realizing break-

before-make protection. VPP switches are turned ON slowly

and OFF quickly, which also prevents cross conduction.

If no card is inserted or the system is in sleep mode, the slot

logic controller outputs a (VCC3 IN, VCC5 IN) = (0,0) to the

MIC2563A, which shuts down VCC. This also places the

switch into a high impedance output shutdown (sleep) mode,

where current consumption drops to nearly zero, with only

tiny CMOS leakage currents flowing.

Internal device control logic, MOSFET drive and bias voltage

is powered from VCC3 IN. The high voltage bias is generated

by an internal charge pump quadrupler. Systems without

3.3V may connect VCC3 IN to 5V. Input logic threshold

voltages are compatible with common PC Card logic control-

lers using either 3.3V or 5V supplies.

The PC Card specification defines two VPP supply pins per

card slot. The two VPP supply pins may be programmed to

different voltages. VPP is primarily used for programming

Flash memory cards. Implementing two independent VPP

voltages is easily accomplished with the MIC2563A and a

MIC2557 PCMCIA VPP switching matrix. Figure 3 shows this

full configuration, supporting independent VPP and both 5.0V

and 3.3V VCC operation. However, few logic controllers

support multiple VPP — most systems connect VPP1 to VPP2

and the MIC2557 is not required. This circuit is shown in

Figure 4.

During flash memory programming with standard (+12V)

flash memories, the PC Card slot logic controller outputs a

(0, 1) to the EN0, EN1 control pins of the MIC2563A, which

connects VPP IN (nominally +12V) to VPP OUT. The low ON

resistance of the MIC2563A switch allows using a small

bypass capacitor on the VPP OUT pins, with the main filtering

action performed by a large filter capacitor on VPP IN (usually

the main power supply filter capacitor is sufficient). Using a

small-value capacitor such as 0.1µF on the output causes

little or no timing delays. The VPP OUT transition from VCC to

12.0V typically takes 250µs. After programming is com-

pleted, the controller outputs a (EN1, EN0) = (0,1) to the

MIC2563A, which then reduces VPP OUT to the VCC level.

Break-before-make switching action and controlled rise times

reduces switching transients and lowers maximum current

spikes through the switch.

Figure 5 shows MIC2563A configuration for situations where

only a single +5V VCC is available.

Output Current and Protection

MIC2563A output switches are capable of passing the maxi-

mum current needed by any PC Card. The MIC2563A meets

or exceeds all PCMCIA specifications. For system and card

protection, output currents are internally limited. For full

system protection, long term (millisecond or longer) output

short circuits invoke overtemperature shutdown, protecting

the MIC2563A, the system power supplies, the card socket

pins, and the PC Card.

March 2004 9 M9999-033004

MIC2563A Micrel

System

Power

Supply

PCMCIA

Card Slot

Controller

MIC2563

PCMCIA

Card Slot

(opt)

3.3V

12V

(opt)

EN0

EN1

VPP1

VCC

VPP IN

(opt) VCC5 IN

VCC3 IN

VCC5_EN

VCC3_EN

VPP2

PCMCIA

Card Slot

VPP1

VCC

VPP2

EN0

EN1

VCC5_EN

VCC3_EN

PCMCIA

Card Slot

EN0

EN1

EN0

EN1

MIC2558

System

Power

Supply

PCMCIA

Card Slot

Controller MIC2563

PCMCIA

Card Slot

(opt)

12V

(opt)

A EN0

A EN1

VPP1

VCC

VPP IN

(opt) VCC5 IN

(opt)

VCC3 IN

A VCC5_EN

A VCC3_EN

VPP2

PCMCIA

Card Slot

VPP1

VCC

VPP2

B EN0

B EN1

B VCC5_EN

B VCC3_EN

PCMCIA

Card Slot

3.3V

Figure 4. Typical PC Card Slot Power Control Application

with Dual VCC (5.0V or 3.3V)

Note: VPP1 and VPP2 are driven together.

Figure 3. PC Card Slot Power Control Application

with Dual VCC (5.0V or 3.3V) and Separate VPP1 and VPP2

MIC2563A Micrel

M9999-110503 10 March 2004

12 10

13 15

1 CLR 9 CLK

SER_DATA

SER_CLK

SER_LATCH

RST#

74x574

VCC

12 10

13 15

1 CLR 9 CLK

A_VPP_PGM (Pin 8)

A_VPP_VCC (Pin 7)

A_VCC5_EN (Pin 5)

A_VCC3_EN (Pin 6)

B_VPP_PGM (Pin 22)

B_VPP_VCC (Pin 21)

B_VCC3_EN (Pin 19)

B_VCC5_EN (Pin 20)

74x175

Figure 6. Interfacing the MIC2563A with a Serial-Output Data Controller

Pinouts shown are for the MIC2563A-1 and a three-wire serial controller.

System

Power

Supply

PCMCIA

Card Slot

Controller MIC2563

PCMCIA

Card Slot

12V

(opt)

A EN0

A EN1

VPP1

VCC

VPP IN

(opt) VCC5 IN

VCC3 IN

A VCC5_EN

A VCC3_EN

VPP2

PCMCIA

Card Slot

VPP1

VCC

VPP2

B EN0

B EN1

B VCC5_EN

B VCC3_EN

PCMCIA

Card Slot

Figure 5. PC Card Slot Power Control Application

without a 3.3V VCC Supply

Note: VCC3 IN and VCC5 IN lines are driven together. The MIC2563A is powered from the VCC3 IN line. In this configuration,

VCC OUT will be 5V when either VCC3 or VCC5 is enabled.

March 2004 11 M9999-033004

MIC2563A Micrel

Component Key

U1.................... MIC2563

U2, U3 ............. 74x175

U4.................... 74x574

Serial Control

Figure 6 shows conversion from a three-wire serial interface,

such as used by the Cirrus Logic CL-PD6730, to the standard

eight-line parallel interface used by the MIC2563A-1. This

interface requires three common, low cost 7400-series logic

ICs:

• 74x574 Octal D Flip-Flop

• 74x175 Quad Flip-Flop with Latches (two needed)

Either 3.3V or 5V logic devices may be used, depending upon

the control voltage employed by the slot logic controller. Pin

numbers in parenthesis refer to the MIC2563A-1BSM. Gerber

files for this PC board layout are available to Micrel custom-

ers. Please contact Micrel directly.

Another serial-to-parallel solution for this application is the

74HC594, 8-bit shift register with output registers. This de-

vice contains the eight D flip-flops plus has latched outputs

suitable for this purpose.

Serial Control Adapter PC Board Layout

MIC2563A Micrel

M9999-110503 12 March 2004

Package Information

2.00 (0.079)

1.73 (0.068)

0.21 (0.008)

0.05 (0.002)

COPLANARITY:

0.10

(

0.004

)

MAX

1.25 (0.049) REF

0.65 (0.0260) BSC

0.875 (0.034) REF

10°

4°

0°

–8°

5.40 (0.213)

5.20 (0.205)

7.90 (0.311)

7.65 (0.301)

10.33 (0.407)

10.07 (0.396)

0.38 (0.015)

0.25 (0.010)

0.22 (0.009)

0.13 (0.005)

0.95 (0.037)

0.55 (0.022)

DIMENSIONS:

MM (INCH)

28-Pin SSOP (SM)

MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 (408) 944-0800 FAX + 1 (408) 944-0970 WEB http://www.micrel.com

The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.

Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can

reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into

the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s

use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify

Micrel for any damages resulting from such use or sale.