DG421CJ Datasheet, PDF (9/12 Pages) Maxim Integrated Products – Improved Low-Power, CMOS Analog Switches with Latches

Improved Low-Power,
CMOS Analog Switches with Latches
_____________________________________________Pin Configurations (continued)
D1 ₁
WR 2
D3 ₃
S3 ₄
S4 5
D4 6
RS ₇
D2 ₈
DG423
DG425
DIP
16 ^S1
15 IN1
14 V-
13 GND
12 VL
11 V+
10 IN2
9 S2
TOP VIEW
3
2 1 20 19
D3 4
S3 5
N.C. 6
S4 7
D4 8
18 V-
DG423
DG425
17 GND
16 N.C.
15 VL
14 V+
9 10 11 12 13
PLCC
N.C. = No Internal Connection
_____________________________Functional Diagrams/Truth Tables (continued)
S1
S3
WR
CK Q
IN1
DRQ
RS
IN2 _{D R Q}
CK Q
S2
S4
D1
D3
DG423
D2
D4
S1
S3
WR
CK Q
IN1
DR
RS
IN2
DR Q
CK
S2
S4
D1
D3
DG425
D2
D4
TWO SPDT SWITCHES PER PACKAGE
DG423 TRUTH TABLE
TWO DPST SWITCHES PER PACKAGE
DG425 TRUTH TABLE
WR RS IN
0
01 ₁
SWITCH 1, 2
Off
On
SWITCH 3, 4
On
Off
WR RS IN SWITCH
0
Off
01
1
On
LOGIC "O" ≤ 0.8V
LOGIC "1" ≥ 2.4V
LATCH OPERATION TRUTH TABLE
LOGIC "O" ≤ 0.8V
LOGIC "1" ≥ 2.4V
IN RS WR
LATCH/SWITCH X
X 1 0 Latch operation transparent.
X1
Control data latched in.
Switches on or off as selected by last IN.
X 0 X _{All latches reset. Switches on or off as}
X
X when IN = 0, WR = 0, RS = 1.
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