ISL23710 Datasheet, PDF (2/8 Pages) Intersil Corporation – Terminal Voltage +-3V or +-5V, 128 Taps Up/Down Interface

ISL23710
Block Diagram
U/D
7-BIT
127
R_H
V-
V_CC
INC
UP/DOWN
COUNTER
CS
126
UP/DOWN
R_H
(U/D)
INCREMENT
INTERFACE
(INC)
AND
R_W
CONTROL
DEVICE SELECT
(CS)
R_L
GND
SIMPLE BLOCK DIAGRAM
RECALL
CONTROL
CIRCUITRY
125
124
ONE
OF
128
DECODER
2
TRANSFER RESISTOR
GATES
ARRAY
1
0
R_L
R_W
DETAILED BLOCK DIAGRAM
Pin Descriptions
PIN NUMBER
1
2
3
4
5
SYMBOL
U/D
V-
GND
CS
NC
6
RH
7
RW
8
RL
9
VCC
10
INC
DESCRIPTION
Controls the direction of wiper movement and whether the counter is incremented or decremented.
Negative supply voltage for the potentiometer wiper control.
Ground. Should be connected to a digital ground.
Chip Select. The device is selected when the CS input is LOW.
No Connect. Pin is to be left unconnected.
A fixed terminal for one end of the potentiometer resistor.
The wiper terminal which is equivalent to the movable terminal of a potentiometer.
A fixed terminal for one end of the potentiometer resistor.
Positive logic supply voltage.
Increment input; negative edge triggered.
2
FN6126.0
August 22, 2005