MAX395 Maxim, MAX395 Datasheet

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MAX395

Manufacturer Part Number
MAX395
Description
The MAX395 8-channel, serially controlled, single-pole/single-throw (SPST) analog switch offers eight separately controlled switches
Manufacturer
Maxim
Datasheet

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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
Systems
Avionics
Audio Signal Routing
19-0448; Rev 0; 11/95
SPI and QSPI are trademarks of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
Call toll free 1-800-998-8800 for free samples or literature.
__________________Pin Configuration
_______________General Description
TOP VIEW
COM0
COM1
COM2
COM3
SCLK
GND
NO0
NO1
NO2
NO3
DIN
V+
________________________________________________________________ Maxim Integrated Products
10
11
12
1
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MAX395
DIP/SO
LOGIC
Industrial and Process-
Control Systems
ATE Equipment
Networking
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13
Serially Controlled, Low-Voltage,
CS
RESET
DOUT
V-
NO7
COM7
NO6
COM6
NO5
COM5
NO4
COM4
8-Channel SPST Switch
____________________________Features
* Contact factory for dice specifications.
** Contact factory for availability.
________________Functional Diagram
______________Ordering Information
MAX395CNG
MAX395CWG
MAX395C/D
MAX395ENG
MAX395EWG
MAX395MRG
SPI™/QSPI™, Microwire™-Compatible Serial
Interface
8 Separately Controlled SPST Switches
100Ω Signal Paths with ±5V Supplies
Rail-to-Rail Signal Handling
Asynchronous RESET Input
Pin Compatible with Industry-Standard MAX335
±2.7V to ±8V Dual Supplies
+2.7V to +16V Single Supply
>2kV ESD Protection per Method 3015.7
TTL/CMOS-Compatible Inputs (with +5V or
±5V Supplies)
PART
COM0
RESET
SCLK
NO0
DIN
CS
8-BIT SHIFT REGISTER
CLOCK TRANSLATOR
CS TRANSLATOR
PARALLEL REGISTER AND TRANSLATOR
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
LATCH
24 Narrow Plastic DIP
24 Wide SO
Dice*
24 Narrow Plastic DIP
24 Wide SO
24 Narrow CERDIP**
PIN-PACKAGE
MAX395
NO7
COM7
DOUT
1

Related parts for MAX395

MAX395 Summary of contents

Page 1

... 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. ...

Page 2

... Narrow Plastic DIP (derate 13.33mW/°C above +70°C)...1067mW Wide SO (derate 11.76mW/°C above +70°C)...............941mW Narrow CERDIP (derate 12.50mW/°C above +70°C)....1000mW Operating Temperature Ranges MAX395C_ G .......................................................0°C to +70°C MAX395E_ G ....................................................-40°C to +85°C MAX395MRG ..................................................-55°C to +125°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300° ...

Page 3

Serially Controlled, Low-Voltage, ELECTRICAL CHARACTERISTICS—Dual Supplies (continued) (V+ = +4.5V to +5.5V -4.5V to -5.5V, T PARAMETER SYMBOL SWITCH DYNAMIC CHARACTERISTICS Turn-On Time t ON Turn-Off Time t OFF Break-Before-Make Delay t BBM Charge Injection (Note 4) V ...

Page 4

... Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp. Note 4: Guaranteed by design. Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies. ...

Page 5

Serially Controlled, Low-Voltage, ELECTRICAL CHARACTERISTICS—Single +5V Supply (V+ = +4.5V to +5.5V 0V MIN PARAMETER SYMBOL ANALOG SWITCH Analog Signal Range V COM COM, NO On-Resistance Off Leakage Current ...

Page 6

... Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp. Note 4: Guaranteed by design. Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies. ...

Page 7

Serially Controlled, Low-Voltage, ELECTRICAL CHARACTERISTICS—Single +3V Supply (V+ = +3.0V to +3.6V 0V MIN PARAMETER SYMBOL ANALOG SWITCH Analog Signal Range V COM COM, NO On-Resistance Off Leakage Current ...

Page 8

... Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over the specified analog signal range. Note 3: Leakage parameters are 100% tested at maximum rated hot temperature and guaranteed by correlation at room temp. Note 4: Guaranteed by design. Note 5: Leakage testing at single supply is guaranteed by testing with dual supplies. ...

Page 9

Serially Controlled, Low-Voltage, __________________________________________Typical Operating Characteristics (V+ = +5V -5V, GND = 0V +25°C, unless otherwise noted.) A ON-RESISTANCE vs. V COM (DUAL SUPPLIES) 140 120 V± = ±2.5V 100 V± = ± V± ...

Page 10

Serially Controlled, Low-Voltage, 8-Channel SPST Switch ____________________________Typical Operating Characteristics (continued) (V+ = +5V -5V, GND = 0V +25°C, unless otherwise noted.) A DATA SETUP TIME vs. POSITIVE SUPPLY VOLTAGE 100 ...

Page 11

... For a simple interface using several MAX395s, “daisy chain” the shift registers as shown in Figure 5. The CS pins of all devices are connected together, and a stream of data is shifted through the MAX395s in series. When CS is brought high, all switches are updated simultaneously. Additional shift registers may be includ- ed anywhere in series with the MAX395 data chain ...

Page 12

... Typically, only one slave is addressed at a time. DOUT is not used. __________Applications Information The MAX395 can be used as a multiplexer, but to obtain the same electrical performance with slightly improved programming speed, use the MAX349 8- channel mux or the MAX350 dual 4-channel mux, both in 18-pin packages ...

Page 13

... Serially Controlled, Low-Voltage, 8x1 Multiplexer To use the MAX395 as an 8x1 multiplexer, connect all common pins together (COM0–COM7) to form the mux output; the mux inputs are NO0–NO7. The mux can be programmed normally, with only one channel selected for every eight clock pulses can be programmed in a fast mode, where channel chang- ing occurs on each clock pulse ...

Page 14

... RESET must not be driven beyond V+ or GND. SW0 Power-Supply Considerations The MAX395 construction is typical of most CMOS ana- log switches. It has three supply pins: V+, V-, and GND. V+ and V- are used to drive the internal CMOS switches and to set the limits of the analog voltage on any switch ...

Page 15

... The MAX395 operates with bipolar supplies between ±3.0V and ±8V. The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 17V. Do not connect the MAX395 V+ to +3V and connect the logic-level pins to TTL logic-level signals. This exceeds the absolute maxi- mum ratings and can damage the part and/or exter- nal circuits ...

Page 16

... TRANSISTOR COUNT: 500 SUBSTRATE CONNECTED TO V+. Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 __________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600 © ...

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