General Description
The MAX349/MAX350 are 8-channel and dual 4-channel
serially controlled multiplexers (muxes). These muxes
conduct equally well in either direction. On-resistance
(100 max) is matched between switches to 16 max
and is flat (10max) 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
Serial Data-Acquisition Industrial and Process-
Systems Control Systems
Avionics ATE Equipment
Audio Signal Routing Networking
____________________________Features
SPI/QSPI, MICROWIRE-Compatible Serial
Interface
8 Separately Controlled SPST Switches
Single 8-to-1 Mux (MAX349)
Dual 4-to-1 Mux (MAX350)
100 Signal Paths with ±5V Supplies
Rail-to-Rail
®
Signal Handling
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)
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
________________________________________________________________
Maxim Integrated Products
1
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
CS
RESET
DOUT
V-
GND
DIN
V+
SCLK
TOP VIEW
N.C.
NO7
NO6
NO5
NO2
NO1
NO0
COM
10
9
NO4
NO3
DIP/SO
MAX349
LOGIC
18
17
16
15
14
13
12
11
1
2
3
4
5
6
7
8
CS
RESET
DOUT
V-
GND
DIN
V+
SCLK
COMB
NO0B
NO1B
NO2B
NO2A
NO1A
NO0A
COMA
10
9
NO3B
NO3A
DIP/SO
MAX350
LOGIC
N.C. = NOT INTERNALLY
CONNECTED
Pin Configurations/Functional Diagrams
19-0451; Rev 1; 10/98
PART
MAX349CPN
MAX349CWN
MAX349CAP 0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE PIN-PACKAGE
18 Plastic DIP
18 Wide SO
20 SSOP
Ordering Information
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
MAX349C/D 0°C to +70°C Dice*
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.
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—Dual Supplies
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltages Referenced to GND
V+...........................................................................-0.3V, +17V
V-............................................................................-17V, +0.3V
V+ to V-...................................................................-0.3V, +17V
SCLK,
CS, DIN, DOUT, RESET .................-0.3V to (V+ + 0.3V)
NO, COM.................................................(V- - 2V) to (V+ + 2V)
Continuous Current into Any Terminal..............................±30mA
Peak Current, NO or COM
(pulsed at 1ms, 10% duty cycle).................................±100mA
Continuous Power Dissipation (T
A
= +70°C)
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ..889mW
18-Pin SO (derate 9.52mW/°C above +70°C)...............762mW
20-Pin 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°C
CONDITIONS UNITS
MIN TYP MAX
(Note 1)
SYMBOLPARAMETER
60 100
VV- V+V
COM
, V
NO
Analog Signal Range
V+ = 5V, V- = -5V,
V
COM
= ±3V, I
NO
= 1mA
125
R
ON
COM-NO On-Resistance
C, E, M
T
A
= +25°C
C, E, M
T
A
= +25°C 16
C, E, M
V+ = 5V, V- = -5V,
V
COM
= ±3V, I
NO
= 1mA
20
R
ON
COM-NO On-Resistance Match
Between Channels (Note 2)
T
A
= +25°C 10
C, E, M
V+ = 5V, V- = -5V, I
NO
= 1mA,
V
COM
= -3V, 0V, 3V
15
R
FLAT(ON)
COM-NO On-Resistance
Flatness (Note 2)
T
A
= +25°C -0.1 0.002 0.1
ANALOG SWITCH
C, E -5 5
V+ = 5.5V, V- = -5.5V,
V
COM
= -4.5V, V
NO
= 4.5V
M -10 10
T
A
= +25°C -0.1 0.002 0.1
C, E -5 5
NO Off-Leakage Current
(Note 3)
I
NO(OFF)
V+ = 5.5V, V- = -5.5V,
V
COM
= 4.5V, V
NO
= -4.5V
M -10 10
nA
T
A
= +25°C -0.1 0.002 0.1
C, E -10 10
M -100 100
T
A
= +25°C -0.1 0.002 0.1
C, E -5 5
V+ = 5.5V,
V- = -5.5V,
V
COM
=
±4.5V,
V
NO
= ±4.5V
M -50 50
T
A
= +25°C -0.2 0.002 0.2
C, E -10 10
M -100 100
T
A
= +25°C -0.2 0.002 0.2
C, E -5 5
COM Off-Leakage Current
(Note 3)
I
COM(OFF)
V+ = 5.5V,
V- = -5.5V,
V
COM
=
-4.5V,
V
NO
= 4.5V
M -50 50
nA
MAX349
MAX349
MAX350
MAX350
MAX349/MAX350
Serially Controlled, Low-Voltage,
8-Channel/Dual 4-Channel Multiplexers
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(V+ = +4.5V to +5.5V, V- = -4.5V to -5.5V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
V2.4C, E, MV
IH
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold High
MAX350
nA
-50 50M
V+ = 5.5V,
V- = -5.5V,
V
COM
= V
NO
=
±4.5V
COM On-Leakage Current
(Note 3)
I
COM(ON)
-5 5C, E
MAX349
-0.2 0.02 0.2T
A
= +25°C
-100 100M
-10 10C, E
DOUT Output Voltage Logic Low V
DOUT
VI
DOUT
= -1.6mA 0 0.4C, E, M
mV100C, E, M
DOUT Output Voltage Logic High V
DOUT
SCLK
HYST
VI
DOUT
= 0.8mA
SCLK Input Hysteresis
2.8 V+C, E, M
µA-1 0.03 1C, E, M
V
DIN
, V
SCLK
,
V
CS
= 0.8V or 2.4V
I
IH,
I
IL
DIN, SCLK, CS, RESET Input
Current Logic High or Low
V0.8C, E, MV
IL
DIN, SCLK, CS, RESET Input
Voltage Logic Threshold Low
-0.2 0.001 0.2T
A
= +25°C
Turn-On Time t
ON
400
ns
From rising edge of CS
C, E, M
200 275T
A
= +25°C
-2 2
30
C, E, M
C, E, M
R
L
= 50, C
L
= 15pF,
V
NO
= 1V
RMS
, f = 100kHz
Off-Isolation V
ISO
dB
pC
pF
pF
Charge Injection (Note 4)
NO Off-Capacitance
COM Off-Capacitance
V
CTE
C
NO(OFF)
C
COM(OFF)
V
COM
= GND, f = 1MHz
C
L
= 1nF, V
NO
= 0V, R
S
= 0
Break-Before-Make Delay t
BBM
2
ns
V
NO
= GND, f = 1MHz
T
A
= +25°C
2T
A
= +25°C
110
From rising edge of CS
T
A
= +25°C
540T
A
= +25°C
PARAMETER SYMBOL
MIN TYP MAX
(Note 1)
UNITS
V+ Supply Current I+
720
µA
V- Supply Current I-
-1 0.1 1
µA
Turn-Off Time t
OFF
300
ns
From rising edge of CS
C, E, M
90 150T
A
= +25°C
DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+
DIN = CS = SCLK = 0V or V+,
RESET = 0V or V+
Channel-to-Channel Crosstalk V
CT
dB< -90
R
L
= 50, C
L
= 15pF,
V
NO
= 1V
RMS
, f = 100kHz
T
A
= +25°C
Switch On-Capacitance C
(ON)
> 90
C, E, M
T
A
= +25°C
pF
Power-Supply Range V+, V- ±3 ±8 V
T
A
= +25°C
8
CONDITIONS
V
COM
= V
NO
= GND,
f = 1MHz
T
A
= +25°C
T
A
= +25°C
DIGITAL I/O
SWITCH DYNAMIC CHARACTERISTICS
POWER SUPPLY

MAX349CAP+T

Mfr. #:
Manufacturer:
Maxim Integrated
Description:
Multiplexer Switch ICs 8:1 Low Voltage MUX
Lifecycle:
New from this manufacturer.
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