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April 2013 DocID024384 Rev1 1/8
8
CLT01-38S4
High speed protected digital termination array
Data brief
Features
8-input circuit in common ground low side
topology
Wide range input DC voltage VI: -30 V to 35 V
On state threshold: < 11 V with RI = 2.2 k
Off state threshold: Iin > 1.5 mA or Vi > 5 V
Protected against -30 V reverse polarity
Typical ILIM = 2.1 to 2.6 mA adjus table curr ent
limiters
Tight current tolerance including temperature
compensation: ±10%
Serial output with an SPI communication b us
Clock frequency up to 6.25 MHz
CPHA = CPOL = 0 bus master operation
Multi CLT operation in daisy chain connection
16-bit mode: 8 bits for data / 8 bits for control
– Minimum capture time: 4 µs
– Input data rate: 200 kbps/100 kHz
– Minimum propagation transfer time: 7 µs
8-bit mode: 8 bits for data
– Minimum capture time: 2.5 µs
– Input data rate: 400 kbps/200 kHz
– Minimum propagation transfer time: 4 µs
VCC = -0.3 to +35 V with RC = 2.2 k
Ambient temperature range: -25 to +85°C
Digital inputs for programmable logic controller
and decentralized I/O modules
Benefits
Enables input to meet type 1, 2 and 3
characteristics of IEC 61131-2 standard
Compatible operation with 2 wires proximity
sensor according EN 60947-5-2 standard
Compact board with surface mou nt integration
and reduced count of isolated couplers
Reduces the count of input-output of the bus
controller circuit
Provides energy-less input LED visual status
Enhanced functional reliability
Built-in over voltage robustness and immune
data transfer
Reduced dissipation: 78 mW max. pe r channel
Complies with following standards
(RI=2.2, RC=2.2, C = 33 nF):
Electrostatic discharge, IEC 61000-4-2:
– ±8 kV contact discharge
– ±15 kV air discharge
Electrical transient immunity IEC 61000-4-4(a):
–F
SCK = 6.25 MHz, ±3 kV
–F
SCK = 10 kHz, ±4 kV
Voltage surge IEC 61000-4-5
– Input: ±15 kV
– Power supply: ±2.5 kV
Applications
Programmable logic controller and
decentralized input modules
High speed protected termination for digital
input with serialized SPI output
IEC 61131-2 type 1, 2 and 3.
CLT01-38S4
HTSSOP-38
a. With 470 pF grounded on CS and 100 pF grounded on
CLK
www.st.com
Description CLT01-38S4
2/8 DocID024384 Rev1
1 Description
CLT01-38S4 adds to the existing current limiter family. Still focusing on power consumption
savings, the whole series allows each customer to find the right solutio n.
The CLT01-38S4 is an octal input termination device with a high speed SPI output. Its
maximum input data rate is 400 kbps while the output SPI speed is 6.25 MHz.
As in previous versions, robustness is a key feature of CLT01-38S4. The product is
compliant with surge standards defined in IEC 61000-4-x.
It can run all types of senso r accord ing to IEC 61131-2. Type 1 a nd 3 with a 2.35 m A limited
current and type 2 using two inputs per sensor with the correct RREF.
2 Characteristics
2.1 Simplified block diagram
Figure 1. Simplified block diagram
MOSI
For i = 1 to 8
Current
reference
8 lines
4 lines
8 lines
8 lines
Logic control
Input state register
Data state register
Control state register
Transfer
logic
Power
reset
Power
supply
Parity
bits generator
Over temperature
alarm
Under voltage
alarm
Shift
Write
MISO, /MISO control
Capture
MOSI
Shift
16-bit
VDD
VDD
VDD
VDD
VC
VR
VIN <V
R
VCS
SCK
COMPP
REF
/CS
SPM
MISO
/MISO
VDD
VDD
VDD
IN1
LD1
DVR
DocID024384 Rev1 3/8
CLT01-38S4 Characteristics
2.2 Basic application diagram
Figure 2. Basic application diagram
2.3 Input I/O pin descriptions
Figure 3. Pinout description of the HTSSOP-38 version (top view)
O-T
O-T
O-T
8 / 16-bit
State transfer
SPI
Voltage
regulator
CLT01-38S4
Field bus controler
C
PHA
= 0
C
POL
= 0
O-T = opto-transistor
or isolator
8-input
TYPE 1 / 3
CLT
R
I
R
C
R
REF
R
S
UVA
R
PD
SPI
LD
1
LD
8
DVR
MOSI
MISO
/CS
SCK
V
DD
SPM
COM
S
V
C
COM
P
IN8
REF
V
CS
V
CC
V
I
V
IN IN1
SPM
VC
VCS
COMP
IN1
IN2
DVR
IN3
IN4
COMP
IN5
IN6
IN7
IN8
COMP
VDD
/CS
SCK
MOSI
NC
COMS
REF
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
SUB
NC
NC
COMP
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
SUB
32
31
30
29
28
27
26
25
24
23
22
21
20
35
37
36
34
33
38
NC
SPM
VC
VCS
COMP
IN1
IN2
DVR
NC
IN3
IN4
COMP
IN5
IN6
IN7
IN8
COMP
VDD
/CS
SCK
MOSI
COMS
REF
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
SUB
NC
NC
COMP
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
32
31
30
29
28
27
26
25
24
23
22
21
20
35
37
36
34
33
38
NC
SPM
VC
VCS
COMP
IN1
IN2
DVR
IN3
IN4
COMP
IN5
IN6
IN7
IN8
COMP
VDD
/CS
SCK
MOSI
MISO
/MISO
COMS
REF
LD1
LD2
LD3
LD4
LD5
LD6
LD7
LD8
SUB
NC
NC
COMP
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
32
31
30
29
28
27
26
25
24
23
22
21
20
35
37
36
34
33
38
32
31
30
29
28
27
26
25
24
23
22
21
20
35
37
36
34
33
38
NC
Characteristics CLT01-38S4
4/8 DocID024384 Rev1
Table 1. Pin-out name and description
Name Type description Pin name
INIPower input Logic input with a current regulation behavior, I = 1 to 8 8 to 11, 13 to 16
LDIPower output LED output driver with a current regulati on behavior, I = 1 to 8 20 to 27
VC Power input 24 V sensor power supply 5
VCS Signal input 24 V sensor power supply sensing input 6
COMP Ground Power ground of power sensor supply 4, 7, 12, 17
VDD Power output 5 V logic power supply 38
COMS Ground Signal ground of logic / output section 30
REF Signal input Input current limiter reference setting 29
SPM Signal input SPI shift register length selector (8 or 16 bits) 3
/CS Logic input SPI chip Select signal 35
SCK Logic input SPI serial clock signal 34
MOSI Logic output SPI serial data input signal 33
DVR Signal input SPI data selector:
DVR = GND pin 31 = MISO
DVR = VDD pin 31 = /MISO
1
MISO or
/MISO Logic output SPI serial data output signal or Inverting SPI serial data output
signal 31
SUB Substrate Exposed pad: connected to die substrate, to connect to COMP Exposed pad
NC Not connected (or to be connected to COMP) 2, 18, 19, 28, 36, 37
DocID024384 Rev1 5/8
CLT01-38S4 Package information
3 Package information
Epoxy meets UL94, V0
Lead-free p ackages
In order to meet environmental requirements, ST offers these devices in dif ferent grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
Figure 4. HTSSOP-38 dimension definitions
c
E1
E
A
A2
A1
b
D
P
P1
0.25 mm
Ø
L
20
19
14°
38
1e
Package information CLT01-38S4
6/8 DocID024384 Rev1
Figure 5. footprin t (dimensions in mm)
Table 2. HTSSOP-38 dimension values
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A - - 1.1 - - 0.043
A1 0.05 - 0.15 0.002 - 0.006
A2 0.85 0.9 0.95 0.033 0.035 0.037
b 0.17 - 0.27 0.007 - 0.011
c 0.09 - 0.20 0.003 - 0.008
D 9.60 9.70 9.80 0.378 0.382 0.386
E1 4.30 4.40 4.50 0.169 0.173 0.177
e - 0.50 - - 0.020 -
E - 6.40 - - 0.252 -
L 0.50 0.60 0.70 0.020 0.024 0.027
P 6.40 6.50 6.60 0.252 0.256 0.260
P1 3.10 3.20 3.30 0.122 0.126 0.130
Ø 0° - 8° 0° - 8°
0.3 6.60
3.30
1.30
0.5
0.60
4.50
7.10
DocID024384 Rev1 7/8
CLT01-38S4 Ordering information
4 Ordering information
Figure 6. Ordering information scheme
5 Revision history
Table 3. Ordering information
Order code Marking Package Weight Base qty Delivery mode
CLT01-38S4-TR CLT01-38S4 HTSSOP-38 114 mg 2500 Tape and reel
CLT01-38S4 CLT01- 38S4 HTSSOP-38 114 mg 40 Tube
CLT 01 - 3 8 S4
Current limiting termination
Version
Current limitation
3 = 3 mA
Octal input
Serial
Table 4. Revision history
Date Revision Changes
23-Apr-2013 1 First issue
CLT01-38S4
8/8 DocID024384 Rev1
Mouser Electronics
Authorized Distributor
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CLT01-38S4 CLT01-38S4-TR