MAX338 Maxim, MAX338 Datasheet - Page 6

• Manufacturer Part Number: MAX338
• Description: The MAX338/MAX339 are monolithic, CMOS analog multiplexers (muxes)
• Manufacturer: Maxim

Using supply voltages less than ±15V will reduce the
analog signal range. The MAX338/MAX339 switches
operate with ±4.5V to ±20V bipolar supplies or with a
+4.5V to +30V single supply. Connect V- to GND when
operating with a single supply. Both device types can
also operate with unbalanced supplies such as +24V
and -5V. The Typical Operating Characteristics graphs
show typical on-resistance with 20V, 15V, 10V, and 5V
supplies. (Switching times increase by a factor of two
or more for operation at 5V.)
Proper power-supply sequencing is recommended for
all CMOS devices. Do not exceed the absolute maxi-
mum ratings, because stresses beyond the listed rat-
ings may cause permanent damage to the devices.
Always sequence V+ on first, then V-, followed by the
logic inputs NO and COM. If power-supply sequencing
is not possible, add two small signal diodes in series
with supply pins for overvoltage protection (Figure 1).
Adding diodes reduces the analog signal range to 1V
below V+ and 1V above V-, but does not affect the
devices’ low switch resistance and low leakage charac-
teristics. Device operation is unchanged, and the differ-
ence between V+ and V- should not exceed 44V.
8-Channel/Dual 4-Channel,
Low-Leakage, CMOS Analog Multiplexers
6
______________________________________________________________Pin Description
__________Applications Information
1, 15, 16,
DIP/SO
_______________________________________________________________________________________
9–12
4–7
—
—
—
—
13
14
—
2
3
8
MAX338
Supply Voltages Other than 15V
THIN QFN
15, 14, 13
7–10
2–5
16
11
12
EP
—
—
—
—
1
6
PIN
Overvoltage Protection
DIP/SO
1, 16
10–3
4–7
8, 9
—
—
—
—
14
15
—
2
3
MAX339
Operation with
THIN QFN
15, 14
8–11
2–5
6, 7
EP
—
16
—
—
—
12
13
1
COMA, COMB
NO1A–NO4A
NO4B–NO1B
Exposed Pad
NO1–NO14
A0, A2, A1
NO8–NO5
A0, A1
NAME
COM
GND
EN
V+
V-
Figure 1. Overvoltage Protection Using External Blocking
Diodes
V
Address Inputs
Address Inputs
Enable
Negative-Supply Voltage Input
Analog Inputs—Bidirectional
Analog Inputs—Bidirectional
Analog Output—Bidirectional
Analog Outputs—Bidirectional
Analog Inputs—Bidirectional
Analog Inputs—Bidirectional
Positive-Supply Voltage Input
Ground
Exposed Pad. Connect to V+.
g
NO
FUNCTION
V+
V-
COM