MAX395 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – Serially Controlled, Low-Voltage, 8-Channel SPST Switch

19-0448; Rev 0; 11/95
Serially Controlled, Low-Voltage,
8-Channel SPST Switch
_______________General Description ____________________________Features
The MAX395 8-channel, serially controlled, single-pole/sin-
gle-throw (SPST) analog switch offers eight separately
controlled switches. The switches conduct equally well in
either direction. On-resistance (100Ω max) is matched
between switches to 5Ω max and is flat (10Ω max) over
the specified signal range.
These CMOS devices can operate continuously with
dual power supplies ranging from ±2.7V to ±8V or a
single supply between +2.7V and +16V. Each switch
can handle rail-to-rail analog signals. The off leakage
current is only 0.1nA at +25°C or 5nA at +85°C.
Upon power-up, all switches are off, and the internal shift
registers are reset to zero. The MAX395 is electrically
equivalent to two MAX391 quad switches controlled by a
serial interface, and is pin compatible with the MAX335.
The serial interface is compatible with SPI™/QSPI™ and
Microwire™. Functioning as a shift register, it allows data
(at DIN) to be clocked in synchronously with the rising
edge of clock (SCLK). The shift register’s output (DOUT)
enables several MAX395s to be daisy chained.
All digital inputs have 0.8V to 2.4V logic thresholds, ensur-
ing both TTL- and CMOS-logic compatibility when using
±5V supplies or a single +5V supply.
________________________Applications
Serial Data-Acquisition Industrial and Process-
Systems
Control Systems
Avionics
ATE Equipment
o SPI™/QSPI™, Microwire™-Compatible Serial
Interface
o 8 Separately Controlled SPST Switches
o 100Ω Signal Paths with ±5V Supplies
o Rail-to-Rail Signal Handling
o Asynchronous RESET Input
o Pin Compatible with Industry-Standard MAX335
o ±2.7V to ±8V Dual Supplies
+2.7V to +16V Single Supply
o >2kV ESD Protection per Method 3015.7
o TTL/CMOS-Compatible Inputs (with +5V or
±5V Supplies)
______________Ordering Information
PART
TEMP. RANGE PIN-PACKAGE
MAX395CNG
0°C to +70°C 24 Narrow Plastic DIP
MAX395CWG
0°C to +70°C 24 Wide SO
MAX395C/D
0°C to +70°C Dice*
MAX395ENG -40°C to +85°C 24 Narrow Plastic DIP
MAX395EWG -40°C to +85°C 24 Wide SO
MAX395MRG -55°C to +125°C 24 Narrow CERDIP**
* Contact factory for dice specifications.
** Contact factory for availability.
Audio Signal Routing
Networking
__________________Pin Configuration
________________Functional Diagram
NO0
NO7
TOP VIEW
SCLK 1
V+ 2
DIN 3
GND 4
NO0 5
MAX395
LOGIC
24 CS
23 RESET
22 DOUT
21 V-
20 NO7
COM0
COM7
PARALLEL REGISTER AND TRANSLATOR
COM0 6
NO1 7
19 COM7
18 NO6
DIN
8-BIT SHIFT REGISTER
DOUT
COM1 8
NO2 9
COM2 10
NO3 11
COM3 12
DIP/SO
17 COM6
16 NO5
15 COM5
14 NO4
13 COM4
RESET
SCLK
CLOCK TRANSLATOR
CS
CS TRANSLATOR
MAX395
LATCH
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products 1
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