Datasheet
MAX4554/MAX4555/MAX4556
Force-Sense Switches
______________________________________________________________________________________ 13
Pin Description
Analog Guard Channel 1 Normally Open Terminal—1
Analog Signal Normally Open Terminals——
Analog Signal Common Terminals. COM2 and COM3 are low-resis-
tance (force) switches on the MAX4555. COM1 is a low-resistance
(force) switch on the MAX4556.
2, 15*,
10*, 7
—
Analog Sense Channel 1 Normally Open Terminal—2
Analog Signal Normally Closed Pins. NC2 and NC3 are low-resistance
(force) switches.
3, 14, 11, 6—
Negative Analog Supply Voltage Input. Connect to GND for single-
supply operation.
44
Analog Force Signal Normally Open Terminal ——
Analog Force Channel 1 Normally Open Terminal—3*
Analog Force Channel 2 Normally Open Terminal—6*
Analog Sense Channel 2 Normally Open Terminal—7
Analog Force Signal Normally Closed Terminal——
Analog Guard Channel 2 Normally Open Terminal—8
Logic-Level Digital Inputs. See
Truth Tables.
1, 16, 9, 811, 10
Enable Logic-Level Digital Input. Connect to GND to enable all switches.—9
Analog Signal Normally Closed Terminal——
Ground. Connect to digital ground. (Analog signals have no ground
reference; they are limited to V+ and V-.)
55
Logic-Level Positive Supply Input. Connect to logic (+5V) supply. Can
be connected to V+ for single-supply operation.
1212
Analog Force Channel Common Terminal—14*
Analog Guard Channel Common Terminal—16
Analog Sense Channel Common Terminal—15
Positive Analog Supply Voltage Input. Internally connected to sub-
strate.
1313
1, 2
14*, 15, 16
—
—
4
3*
—
—
—
6*
—
9, 10, 11
—
—
7, 8
5
12
—
—
—
13
NO3, NO2
COM1, COM2
COM3, COM4
NOS1
NC1, NC2,
NC3, NC4
V-
NO1*
NOF1*
NOF2*
NOS2
NC1*
NOG2
IN1, IN2,
IN3, IN4
NOG1
EN
NC2, NC3
GND
VL
COMF*
COMG
COMS
V+
NAME FUNCTION
PIN
MAX4554 MAX4555 MAX4556
* Indicates high-current, low-resistance (force) switch terminal.
Note: NO_, NC_, and COM_ pins are identical and interchangeable. Any may be considered as an input or output; signals pass
equally well in either direction.