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Maxim Integrated - Improved Low-Power / CMOS Analog Switches with Latches

Numéro de référence DG425DY
Description Improved Low-Power / CMOS Analog Switches with Latches
Fabricant Maxim Integrated 
Logo Maxim Integrated 





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DG425DY fiche technique
19-0137; Rev 1; 3/94
Improved Low-Power,
CMOS Analog Switches with Latches
_______________General Description
Maxim’s redesigned DG421/DG423/DG425 monolithic
analog switches now feature guaranteed on-resistance
matching (3max) between switches and on-resistance
flatness over the signal range (4max). These low on-
resistance switches (20typ) conduct equally well in both
directions. They guarantee a low charge injection of 15pC
maximum and an ESD tolerance of 2000V minimum per
Method 3015.7. Off leakage current over temperature has
also been reduced (less than 5nA at +85°C).
The DG421/DG423/DG425 are precision, dual CMOS
switches with latchable logic inputs that simplify inter-
facing with microprocessors (µPs). The single-pole/single-
throw DG421 and double-pole/single-throw DG425 are
normally open dual switches. The dual, single-
pole/double-throw DG423 has two normally open and
two normally closed switches. Fast switching times
(175ns for tON and 145ns for tOFF) and low power
consumption (35µW max) make these parts ideal for
battery-powered applications requiring µP-compatible
switches. Operation is from a single +10V to +30V supply,
or bipolar ±4.5V to ±20V supplies. Fabricated with the
same 44V silicon-gate process, these switches have
rail-to-rail signal handling capabilities.
_______________________Applications
Sample-and-Hold Circuits
Fax Machines
Battery-Operated Systems
Guidance and Control Systems
Audio Signal Routing
Modems
Test Equipment
PBX, PABX
Military Radios
Communication Systems
__Functional Diagrams/Truth Tables
______________________New Features
o Plug-In Upgrades for Industry-Standard
DG421/DG423/DG425
o Improved r(DS)ON Match Between Channels (3max)
o Guaranteed rFLAT(ON) Over Signal Range (4max)
o Improved Charge Injection (15pC max)
o Improved Off Leakage Current Over Temperature
(<5nA at +85°C)
o Withstands Electrostatic Discharge (2000V min)
per Method 3015.7
__________________Existing Features
o Low rDS(ON) (35max)
o Single-Supply Operation +10V to +30V
Bipolar-Supply Operation ±4.5V to ±20V
o Low Power Consumption (35µW max)
o Rail-to-Rail Signal Handling Capability
o TTL/CMOS-Logic Compatible
______________Ordering Information
PART
TEMP. RANGE
PIN-PACKAGE
DG421CJ
0°C to +70°C
16 Plastic DIP
DG421CY
0°C to +70°C
16 SO
DG421C/D
0°C to +70°C
Dice*
DG421DJ
-40°C to +85°C
16 Plastic DIP
DG421DY
-40°C to +85°C
16 SO
DG421DK
-40°C to +85°C
16 CERDIP
DG421AK
-55°C to +125°C
16 CERDIP**
Ordering Information continued at end of data sheet.
* Contact factory for dice specifications.
**Contact factory for availability and processing to MIL-STD-883B.
_________________Pin Configurations
S1 D1
WR
IN1 CK
DQ
R
IN2 CK
DQ
RS R
S2
DG421
D2
TWO SPST SWITCHES
PER PACKAGE
DG421 TRUTH TABLE
WR RS IN SWITCH
0
0 11
Off
On
LOGIC "O" 0.8V
LOGIC "1" 2.4V
SWITCHES SHOWN FOR
LOGIC "1" INPUT
Functional Diagrams/Truth Tables continued at end of data sheet.
TOP VIEW
D1 1
WR 2
N.C. 3
N.C. 4
N.C. 5
N.C. 6
RS 7
D2 8
DG421
16 S1
15 IN1
14 V-
13 GND
12 VL
11 V+
10 IN2
9 S2
N.C. = No Internal Connection
DIP
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.

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