MAX349-MAX350 MAXIM [Maxim Integrated Products], MAX349-MAX350 Datasheet

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MAX349-MAX350

Manufacturer Part Number
MAX349-MAX350
Description
Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
The MAX349/MAX350 are 8-channel and dual 4-channel
serially controlled multiplexers (muxes). These muxes
conduct equally well in either direction. On-resistance
(100Ω max) is matched between switches to 16Ω 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 sin-
gle supply between +2.7V and +16V. Each mux 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 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 MAX349s or MAX350s
to be daisy chained.
All digital inputs have 0.8V or 2.4V logic thresholds,
ensuring both TTL and CMOS-logic compatibility when
using ±5V supplies or a single +5V supply.
________________________Applications
19-0451; Rev 1; 10/98
Serial Data-Acquisition
Systems
Avionics
Audio Signal Routing
Pin Configurations continued at end of data sheet.
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
N.C. = NOT INTERNALLY
CONNECTED
SCLK
COM
________________________________________________________________ Maxim Integrated Products
GND
NO0
NO1
NO2
NO3
DIN
V+
1
2
3
4
5
6
7
8
9
8-Channel/Dual 4-Channel Multiplexers
General Description
Industrial and Process-
Control Systems
ATE Equipment
Networking
DIP/SO
MAX349
LOGIC
Serially Controlled, Low-Voltage,
18
17
16
15
12
11
10
14
13
CS
RESET
DOUT
V-
N.C.
NO7
NO5
NO4
NO6
Pin Configurations/Functional Diagrams
TOP VIEW
____________________________Features
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
MAX349CPN
MAX349CWN
MAX349CAP
MAX349C/D
SPI/QSPI, MICROWIRE-Compatible Serial
Interface
8 Separately Controlled SPST Switches
Single 8-to-1 Mux (MAX349)
Dual 4-to-1 Mux (MAX350)
100Ω Signal Paths with ±5V Supplies
Rail-to-Rail
Asynchronous RESET Input
±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
COMA
NO0A
NO1A
NO2A
NO3A
SCLK
®
GND
DIN
V+
Signal Handling
TEMP. RANGE
1
2
3
4
5
6
7
9
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
8
Ordering Information
DIP/SO
MAX350
LOGIC
18 Plastic DIP
18 Wide SO
20 SSOP
Dice*
18
17
16
15
14
13
12
11
10
PIN-PACKAGE
CS
RESET
DOUT
V-
COMB
NO0B
NO1B
NO2B
NO3B
1

Related parts for MAX349-MAX350

MAX349-MAX350 Summary of contents

Page 1

... MICROWIRE™. Functioning as a shift register, it allows data (at DIN clocked in synchronously with the rising edge of clock (SCLK). The shift register’s output (DOUT) enables several MAX349s or MAX350s to be daisy chained. All digital inputs have 0.8V or 2.4V logic thresholds, ensuring both TTL and CMOS-logic compatibility when using ± ...

Page 2

... SSOP (derate 8.00mW/°C above +70°C) ..........640mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature Ranges MAX349C_ _, MAX350C_ _ .................................0°C to +70°C MAX349E_ _, MAX350E_ _ ...............................-40°C to +85°C MAX349M_ _, MAX350M_ _ ...........................-55°C to +125°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10sec) .............................+300° ...

Page 3

... COM Off-Capacitance C Switch On-Capacitance Off-Isolation Channel-to-Channel Crosstalk POWER SUPPLY Power-Supply Range V+ Supply Current V- Supply Current _______________________________________________________________________________________ Serially Controlled, Low-Voltage unless otherwise noted. Typical values are MIN MAX CONDITIONS MAX349 V+ = 5.5V -5.5V, COM(ON COM NO ±4.5V MAX350 ...

Page 4

Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers TIMING CHARACTERISTICS—Dual Supplies (Figure 1) (V+ = +4.5V to +5.5V -4.5V to -5.5V, T PARAMETER SYMBOL SERIAL DIGITAL INTERFACE SCLK Frequency f Cycle Time Lead Time CS Lag Time ...

Page 5

... 5.5V 4.5V, COM NO(OFF 5.5V 0V, COM V = 4.5V NO MAX349 V+ = 5.5V 4.5V, COM MAX350 COM(OFF) MAX349 V+ = 5.5V 0V, COM V = 4.5V NO MAX350 MAX349 V+ = 5.5V COM(ON) COM NO ±4.5V MAX350 DIN SCLK 0. 0.8mA DOUT DOUT -1.6mA DOUT ...

Page 6

Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers ELECTRICAL CHARACTERISTICS—Single +5V Supply (continued) (V+ = +4.5V to +5.5V 0V MIN PARAMETER SYMBOL SWITCH DYNAMIC CHARACTERISTICS Turn-On Time Turn-Off Time Break-Before-Make Delay Charge Injection (Note 4) Off-Isolation ...

Page 7

Multiplexers TIMING CHARACTERISTICS—Single +5V Supply (Figure 1) (V+ = +4.5V to +5.5V 0V MIN PARAMETER SYMBOL SERIAL DIGITAL INTERFACE SERIAL DIGITAL INTERFACE SCLK Frequency Cycle Time (Note Lead Time ...

Page 8

... Typical values are at T MAX CONDITIONS , 3.0V 1.5V, COM 1mA NO MAX349 V+ = 3.6V 3V, COM MAX350 MAX349 V+ = 3.6V 0V, COM MAX350 MAX349 V+ = 3.6V COM NO MAX350 DIN SCLK , 0. 0.1mA DOUT DOUT I = -1.6mA DOUT DOUT ...

Page 9

Multiplexers ELECTRICAL CHARACTERISTICS—Single +3V Supply (continued) (V+ = +3.0V to +3.6V 0V MIN PARAMETER SYMBOL SWITCH DYNAMIC CHARACTERISTICS Turn-On Time (Note 4) Turn-Off Time (Note 4) Break-Before-Make Delay (Note 4) t Charge ...

Page 10

Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers TIMING CHARACTERISTICS—Single +3V Supply (Figure 1) (V+ = +3.0V to +3.6V 0V MIN PARAMETER SYMBOL SERIAL DIGITAL INTERFACE SCLK Frequency Cycle Time (Note Lead ...

Page 11

Multiplexers __________________________________________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 12

Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers (V+ = +5V -5V, GND = 0V +25°C, unless otherwise noted.) A DATA SETUP TIME vs. POSITIVE SUPPLY VOLTAGE 100 ...

Page 13

... Multiplexers PIN MAX349 MAX350 DIP/SO SSOP DIP/ — 6–13 6–9, 11–14 — — — 5 — — 6–9 — — 10–13 — — 10, 15, 16 — Note: NO and COM pins are identical and interchangeable. Either may be considered as an input or an output; signals pass equally well in either direction ...

Page 14

... MAX350s, “daisy-chain” the shift registers as shown in Figure 5. The CS pins of all devices are connected, 14 ______________________________________________________________________________________ and a stream of data is shifted through the MAX349s or MAX350s in series. When CS is brought high, all switches are updated simultaneously. Additional shift registers may be included anywhere in series with the MAX349/MAX350 data chain ...

Page 15

... Multiplexers Table 1. MAX349 Serial-Interface Switch Programming RESET ...

Page 16

... DOUT is sourced from V+. RESET must not be driven beyond V+ or GND. MAX349 MICROWIRE MAX350 PORT THE DOUT-MISO CONNECTION IS NOT REQUIRED FOR WRITING TO THE MAX349/MAX350, BUT MAY BE USED FOR DATA-ECHO PURPOSES. Figure 4. Connections for SPI and QSPI SCLK MAX349 MAX350 DIN DOUT ...

Page 17

... FOUR CLOCK PULSES Figure 7. Differential Multiplexer Input Control Power-Supply Considerations The MAX349/MAX350 construction is typical of most CMOS analog switches. It has three supply pins: V+, V- and GND. V+ and V- are used to drive the internal CMOS switches, and they set the limits of the analog voltage on any switch. Reverse ESD-protection diodes are internally connected between each analog signal pin and both V+ and V- ...

Page 18

... The V+ and V- supplies need not be symmetrical, but their sum cannot exceed the absolute maximum rating of 17V. Do not connect the MAX349/MAX350 V+ to +3V and connect the logic- level pins to TTL logic-level signals. This exceeds the absolute maximum ratings and can damage the part and/or external circuits ...

Page 19

... Plastic DIP 18 Wide SO COM 20 SSOP Dice* NO0 18 Plastic DIP 18 Wide SO NO1 20 SSOP 18 CERDIP** GND COMA NO0A NO1A TRANSISTOR COUNT: 500 SUBSTRATE CONNECTED TO V+. MAX349 V+ CS DIN SCLK RESET DOUT NO4 NO5 NO2 NO3 0.100" (2.54mm) MAX350 V+ CS SCLK DIN RESET DOUT ...

Page 20

Serially Controlled, Low-Voltage, 8-Channel/Dual 4-Channel Multiplexers ________________________________________________________Package Information 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 ...

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