7/7/05
AC INPUT PHOTOTRANSISTOR
SMALL OUTLINE SURFACE MOUNT
OPTOCOUPLERS
Page 1 of 7
© 2005 Fairchild Semiconductor Corporation
MOC256-M
DESCRIPTION
The MOC256-M is an AC input phototransistor optocoupler. The device consists of two infra-
red emitters connected in anti-parallel and coupled to a silicon NPN phototransistor detector.
It is designed for applications requiring the detection or monitoring of AC signals. The device
is constructed with a standard SOIC-8 footprint.
FEATURES
• UL Recognized File (#E90700, Volume 2)
• VDE recognized (File #136616)
- Ordering option V (i.e. MOC256V-M)
• Industry Standard SOIC-8 Surface Mountable Package, with 0.050" lead spacing
•Available in Tape and Reel Option
• Bidirectional AC Input (Protection Against Reversed DC Bias)
• Guaranteed CTR Symmetry of 2:1 Maximum
• High Input-Output Isolation of 2500 Vac (rms) Guaranteed
BASE
N/C
AC IN
AC IN
1
2
3
4 5
6
7
8
EMITTER
COLLECTOR
N/C
N/C
ABSOLUTE MAXIMUM RATINGS
(T
A
= 25°C Unless otherwise specified)
Rating Symbol Value Unit
EMITTER
Forward Current - Continuous I
F
60 mA
Forward Current - Peak (PW = 100 µs, 120 pps) I
F
(pk) 1.0 A
LED Power Dissipation @ T
A
= 25°C
Derate above 25°C P
D
90
0.8
mW
mW/°C
DETECTOR
Collector-Emitter Voltage V
CEO
30 V
Emitter-Base Voltage V
ECO
7.0 V
Collector Current-Continuous I
C
150 mA
Detector Power Dissipation @ T
A
= 25°C
Derate above 25°C P
D
150
1.76
mW
mW/°C
TOTAL DEVICE
Input-Output Isolation Voltage
(f = 60 Hz, t = 1 min.) V
ISO
2500 Vac(rms)
Total Device Power Dissipation @ T
A
= 25°C
Derate above 25°C P
D
250
2.94
mW
mW/°C
Ambient Operating Temperature Range T
A
-40 to +100 °C
Storage Temperature Range T
stg
-40 to +150 °C
7/7/05
Page 2 of 7
© 2005 Fairchild Semiconductor Corporation
AC INPUT PHOTOTRANSISTOR
SMALL OUTLINE SURFACE MOUNT
OPTOCOUPLERS
MOC256-M
* Typical values at T
A
= 25°C
NOTE:
1. Current Transfer Ratio (CTR) = I
C
/I
F
x 100%.
2. Isolation Surge Voltage, V
ISO
, is an internal device dielectric breakdown rating.
3. For this test, Pins 1 and 2 are common and Pins 5, 6 and 7 are common.
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise specified)
Parameter Test Conditions Symbol Min Typ* Max Unit
EMITTER
Input Forward Voltage (I
F
= ±10 mA) V
F
— 1.2 1.5 V
Input Capacitance (V = 0 V, f = 1 MHz) C
J
—20— pF
DETECTOR
Collector-Emitter Dark Current
(V
CE
= 10 V, T
A
= 25°C) I
CEO1
— 1.0 100 nA
(V
CE
= 10 V, T
A
= 100°C) I
CEO2
— 1.0 — µA
Collector-Base Dark Current (V
CB
= 10V) I
CBO
— 0.2 — nA
Collector-Emitter Breakdown Voltage (I
C
= 10 mA) BV
CEO
30 100 — nA
Collector-Base Breakdown Voltage (I
C
= 100 µA) BV
CBO
70 120 — V
Emitter-Collector Breakdown Voltage (I
E
= 100 µA) BV
ECO
510— V
Collector-Emitter Capacitance (f = 1.0 MHz, V
CE
= 0) C
CE
—7— pF
Collector-Base Capacitance (f = 1.0 MHz, V
CB
= 0) C
CB
—20— pF
Emitter-Base Capacitance (f = 1.0 MHz, V
EB
= 0) C
EB
—10— pF
COUPLED
Current Transfer Ratio
(1)
(I
F
= ±10 mA, V
CE
= 10 V) CTR 20 150 — %
Output-Collector Current Symmetry (I
C
@ I
F
= +10 mA, V
CE
= 10V)
(I
C
@ I
F
= -10 mA, V
CE
= 10V) — 0.5 2.0 —
Collector-Emitter Saturation Voltage (I
C
= 0.5 mA, I
F
= ±10 mA) V
CE (sat)
— 0.1 0.4 V
Isolation Surge Voltage
(2,3)
(f = 60 Hz AC Peak, t = min) V
ISO
2500 — — Vac(rms)
Isolation Resistance
(3)
(V = 500 V) R
ISO
10
11
——
Ω
Isolation Capacitance
(3)
(V = 0 V, f = 1 MHz) C
ISO
— 0.2 — pF
()
7/7/05
Page 3 of 7
© 2005 Fairchild Semiconductor Corporation
AC INPUT PHOTOTRANSISTOR
SMALL OUTLINE SURFACE MOUNT
OPTOCOUPLERS
MOC256-M
Fig. 2 Output Curent vs. Input Current
IF - LED INPUT CURRENT (mA)
0.1 1 10 100
I
C
- OUTPUT COLLECTOR CURRENT (NORMALIZED)
0.01
0.1
1
10
VCE = 5V
NORMALIZED TO I
F
= 10 mA
Fig. 3 Output Current vs. Ambient Temperature
T
A
- AMBIENT TEMPERATURE (
o
C)
-80 -60 -40 -20 0 20406080100120
I
C
- OUTPUT COLLECTOR CURRENT (NORMALIZED)
0.1
1
10
NORMALIZED TO T
A
= 25
o
C
Fig. 4 Output Current vs. Collector - Emitter Voltage
V
CE
- COLLECTOR -EMITTER VOLTAGE (V)
012345678910
I
C
- OUTPUT COLLECTOR CURRENT (NORMALIZED)
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
I
F
= 10 mA
NORM ALIZED TO V
CE
= 5V
Fig. 5 Dark Current vs. Ambient Temperature
T
A
- AMBIENT TEMPERATURE (
o
C)
020406080100
I
CEO
- COLLECTOR -EMITTER DARK CURRENT (nA)
0.1
1
10
100
1000
10000
V
CE
=10V
Fig. 1 Input Voltage vs. Input Current
VF
- INPUT VOLTAGE (V)
-2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 2.0
IF - INPUT CURRENT (mA)
-100
-80
-60
-40
-20
0
20
40
60
80
100
7/7/05
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© 2005 Fairchild Semiconductor Corporation
AC INPUT PHOTOTRANSISTOR
SMALL OUTLINE SURFACE MOUNT
OPTOCOUPLERS
MOC256-M
Package Dimensions (Surface Mount) 8-Pin Small Outline
Lead Coplanarity : 0.004 (0.10) MAX
0.202 (5.13)
0.182 (4.63)
0.021 (0.53)
0.011 (0.28) 0.050 (1.27)
TYP
0.164 (4.16)
PIN1
0.144 (3.66)
0.244 (6.19)
0.224 (5.69)
0.143 (3.63)
0.123 (3.13)
0.008 (0.20)
0.003 (0.08)
0.010 (0.25)
0.006 (0.16)
SEATING PLANE
0.024 (0.61)
0.050 (1.27)
0.155 (3.94)
0.275 (6.99)
0.060 (1.52)
7/7/05
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© 2005 Fairchild Semiconductor Corporation
AC INPUT PHOTOTRANSISTOR
SMALL OUTLINE SURFACE MOUNT
OPTOCOUPLERS
MOC256-M
ORDERING INFORMATION
MARKING INFORMATION
Option Order Entry Identifier Description
VVVDE 0884
R1 R1 Tape and reel (500 units per reel)
R1V R1V VDE 0884, Tape and reel (500 units per reel)
R2 R2 Tape and reel (2500 units per reel)
R2V R2V VDE 0884, Tape and reel (2500 units per reel)
1
2
6
43 5
Definitions
1Fairchild logo
2Device number
3VDE mark (Note: Only appears on parts ordered with VDE
option – See order entry table)
4 One digit year code, e.g., ‘3’
5Two digit work week ranging from ‘01’ to ‘53’
6 Assembly package code
256
SYYXV
7/7/05
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© 2005 Fairchild Semiconductor Corporation
AC INPUT PHOTOTRANSISTOR
SMALL OUTLINE SURFACE MOUNT
OPTOCOUPLERS
MOC256-M
Carrier Tape Specifications
Reflow Profile
4.0 ± 0.10
Ø1.5 MIN
User Direction of Feed
2.0 ± 0.05
1.75 ± 0.10
5.5 ± 0.05
12.0 ± 0.3
8.0 ± 0.10
0.30 MAX
8.3 ± 0.10
3.50 ± 0.20
0.1 MAX 6.40 ± 0.20
5.20 ± 0.20
Ø1.5 ± 0.1/-0
300
280
260
240
220
200
180
160
140
120
100
80
60
40
20
0
°C
Time (s)
0 60 180120 270
260°C
>245°C = 42 Sec
Time above
183°C = 90 Sec
360
1.822°C/Sec Ramp up rate
33 Sec
7/7/05
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES
OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR
CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body, or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
2. A critical component in any component of a life support
device or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO
ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME
ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;
NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
Page 7 of 7
© 2005 Fairchild Semiconductor Corporation
AC INPUT PHOTOTRANSISTOR
SMALL OUTLINE SURFACE MOUNT
OPTOCOUPLERS
MOC256-M
