MAX349 Maxim, MAX349 Datasheet - Page 13

• Manufacturer Part Number: MAX349
• Description: The MAX349/MAX350 are 8-channel and dual 4-channel serially controlled multiplexers (muxes)
• Manufacturer: Maxim

Note: NO and COM pins are identical and interchangeable. Either may be considered as an input or an output; signals pass equally
Figure 1. Timing Diagram
COM-OUT
DIP/SO
6–13
DIN
DOUT
14
15
16
17
18
SCLK
—
—
—
—
1
2
3
4
5
CS
well in either direction.
MAX349
6–9, 11–14
10, 15, 16
SSOP
17
18
19
20
—
—
—
—
1
2
3
4
5
______________________________________________________________________________________
PIN
8-Channel/Dual 4-Channel Multiplexers
DIP/SO
10–13
6–9
14
15
16
17
18
—
—
—
1
2
3
4
5
MAX350
t
CSS
t
DS
SSOP
11–14
10, 16
Serially Controlled, Low-Voltage,
6–9
—
—
15
17
18
19
20
1
2
3
4
5
t
DH
t
CH
NO0A–NO3A
NO3B–NO0B
NO0–NO7
COMA
COMB
RESET
NAME
DOUT
SCLK
COM
GND
N.C.
DIN
CS
V+
V-
t
DO
t
CL
Serial Clock Digital Input
Positive Analog Supply Voltage Input
Serial Data Digital Input
Ground. Connect to digital ground. (Analog signals have
no ground reference; they are limited to V+ and V-.)
Common Analog Switch (mux output)
Normally Open Analog Switch Inputs 0–7
Common Analog Switch “A” (mux output)
Normally Open Analog Switch “A” Inputs 0–3
Normally Open Analog Switch “B” Inputs 0–3
Common Analog Switch “B” (mux output)
No Connect, not internally connected.
Negative Analog Supply Voltage Input. Connect to GND
for single-supply operation.
Serial Data Digital Output. Output high is V+.
RESET Input. Connect to logic high (or V+) for normal operation.
Drive low to set all switches off and set internal shift registers to 0.
Chip-Select Digital Input (Figure 1)
FUNCTION
t
CSH2
Pin Description
t
t
ON
OFF
,
13