4-3
BKPF-L753A
IC
IC

PCF8574AT (PHILIPS)

NJM5534M (JRC)

NJM5534M(TE2)

MAX742CWP-TE2 (MAXIM)

FB+
CC+
AV+
100/200
12/15
VREF
SS
CC_
FB_
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
GND
CSH+
CSL+
EXT+
PUMP
PDRV_
EXT_
V+
CSH_
CSL_
A-GND

DUAL-OUTPUT, SWITCH-MODE REGURATOR

—TOP VIEW—
INPUT
12/15
100/200
AV+
CC_
CC+
CSH_
CSH+
CSL_
CSL+
FB_
FB+
PDRV
SS
V+
OUTPUT
EXT_
EXT+
VREF
: SELECTS VOUTS (±15 V/±12 V)
: SELECTS OSC FREQUENCY (200 kHz/100 kHz)
: ANALOG SUPPLY VOLTAGE INPUT (+5 V)
: INVERTING COMPENSATION CAPACITOR
: STEP-UP COMPENSATION CAPACITOR
: CURRENT SENSE HIGH (INVERTING SECTION)
: CURRENT SENSE HIGH (STEP-UP SECTION)
: CURRENT SENSE LOW (INVERTING SECTION)
: CURRENT SENSE LOW (STEP-UP SECTION)
: INVERTING SECTION FEEDBACK INPUT
: STEP-UP FEEDBACK INPUT
: VOLTAGE INPUT
: SOFT-START TIMING CAPACITOR
: HIGH-CURRENT SUPPLY VOLTAGE INPUT (+5 V)
: PUSH-PULL OUTPUT
: PUSH-PULL OUTPUT
: REFERENCE VOLTAGE OUTPUT
SOFT-START
AND
THERMAL
SHUTDOWN
PAMP
OSC
SQUARE
PULSE
12/15
SELECT
VREF
VREF 7
S
QR
+
_
S
Q
R
+
_
EXT+
17 V+
13
GND
18
EXT_
14
PDRV
15
PUMP
16
CSH_
12
CSL_
11
CSH+
20
CSL+
19
∑
∑
SS
8
FB+1
A-GND 3
12/
15
6
FB_10
5
100/
200
4
AV+
2
CC+
9
CC_
1
2
3
4
_
+
8
7
6
5
VEE
VCC
BALANCE COMPENSATE
/BALANCE
COMPENSATE
OPERATINAL AMPLIFIER
—TOP VIEW—
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A0IN
A1IN
A2IN
P0I/O
P1I/O
P2I/O
P3I/O
SDA
SCL
INT
P7I/O
P6I/O
P5I/O
P4I/O
13
4
5
6
7
9
10
11
12
15
INT
P0
P1
P2
P3
P4
P5
P6
P7
SDA
A0
A1
A2
SCL
1
2
3
14
INPUT
A0 - A2
SCL
OUTPUT
INT
SDA
INPUT/OUTPUT
P0 - P7
; ADDRESS INPUTS
; SYSTEM CLOCK LINE
; INTERRUPT OUTPUT
; SERIAL DATA LINE
; 8-BIT QUASI-BIDIRECTIONAL I/O PORT
GND
VDD
C-MOS REMOTE 8-BIT I/O EXPANDER
—TOP VIEW—
INTERRUPT
LOGIC
INPUT
FILTER
POWER-ON
RESET
LP FILTER
SHIFT
REGISTER
I/O
PORTS
8-BIT
INT 13
A0 1
A1 2
A2 3
SCL 14
SDA 15
VDD 16
VSS 8
PCF8574
PCF8574A
P0
4
P1
5
P2
6
P3
7
P4
9
P5
10
P6
11
P7
12
write pulse
read pulse
I
2
C BUS
CONTROL