19-0448; Rev 0; 11/95
Serially Controlled, Low-Voltage,
8-Channel SPST Switch
________________________Applications
Serial Data-Acquisition
Systems
Avionics
Audio Signal Routing
Industrial and ProcessControl Systems
ATE Equipment
Networking
__________________Pin Configuration
____________________________Features
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
MAX395C/D
MAX395ENG
0°C to +70°C
0°C to +70°C
-40°C to +85°C
24 Wide SO
Dice*
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.
________________Functional Diagram
NO0
NO7
TOP VIEW
SCLK
1
V+
2
DIN
3
GND
4
21 V-
NO0
5
20 NO7
COM0
6
19 COM7
NO1
7
18 NO6
COM1
8
17 COM6
NO2
9
16 NO5
MAX395
24 CS
23 RESET
LOGIC
COM2 10
15 COM5
NO3 11
COM0
COM7
22 DOUT
PARALLEL REGISTER AND TRANSLATOR
DIN
RESET
MAX395
SCLK
CLOCK TRANSLATOR
14 NO4
COM3 12
DOUT
8-BIT SHIFT REGISTER
LATCH
13 COM4
DIP/SO
CS
CS TRANSLATOR
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products
Call toll free 1-800-998-8800 for free samples or literature.
1
MAX395
_______________General Description
The MAX395 8-channel, serially controlled, single-pole/single-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, ensuring both TTL- and CMOS-logic compatibility when using
±5V supplies or a single +5V supply.
