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2
FN6054.3
October 28, 2010
Pinout
ISL43231
(20 LD QFN)
TOP VIEW
NOA
COMA
NCA
EN
NC
B
NO
B
N.C.
+V
COM
B
-V
GND
N.C.
LE
ADD
A
COMC
NOC
NCC
ADDC
ADDB
1
2
3
4
5
78
9
10
6
20
19
18
17
16
13
14
15
12
11
Truth Table
ISL43231
LE
EN
ADDC ADDB ADDA
SWITCH ON
0
1
0
X
Last Switches
Selected
X
0
XXXX
NONE
XX
1
XXX
NONE
110
X
0
NCA
110
X
1
NOA
110
X
0
X
NCB
110
X
1
X
NOB
1100
X
NCC
1101
X
NOC
NOTE: Logic “0”
≤0.8V. Logic “1” ≥2.4V, with V+ between 2.7V and
10V.
X = Don’t Care.
Ordering Information
PART
NUMBER
(Note)
PART
MARKING
TEMP.
RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL43231IRZ* 43 231IRZ
-40 to +85 20 Ld QFN
L20.4x4
*Add “-T” suffix for tape and reel. Please refer to
TB347 for details
on reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination
finish, which is RoHS compliant and compatible with both SnPb and
Pb-free soldering operations). Intersil Pb-free products are MSL
classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
Pin Descriptions
PIN
FUNCTION
V+
Positive Power Supply Input
V-
Negative Power Supply Input. Connect to GND for
Single Supply Configurations.
GND
Ground Connection
EN
Digital Control Input. Connect to GND for Normal
Operation. Connect to V+ to turn all switches off.
EN
Digital Control Input. Connect to V+ for Normal
Operation. Connect to GND to turn all switches off.
LE
Digital Control Input. Connect to +V for Normal
Operation. Connect to GND to latch the last switch state.
COM
Analog Switch Common Pin
NO
Analog Switch Normally Open Pin
NC
Analog Switch Normally Closed Pin
ADD
Address Input Pin
N.C.
No Internal Connection
ISL43231