Datasheet

Applications Information
Operation with Supply Voltages
Other than 15V
Using supply voltages less than ±15V will reduce the
analog signal range. The MAX336/MAX337 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.)
Overvoltage Protection
Proper power-supply sequencing is recommended
for all CMOS devices. Do not exceed the absolute
maximum ratings, because stresses beyond the listed
ratings 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 significantly affect the
devices’ low switch resistance and low leakage character-
istics. Device operation is unchanged, and the difference
between V+ and V- should not exceed 44V.
* Analog signal inputs and outputs are names of convenience only; they are identical and interchangeable.
Figure 1. Overvoltage Protection Using External Blocking
Diodes
PIN
NAME FUNCTION
MAX336 MAX337
1 1 V+ Positive Supply-Voltage Input
2, 3, 13 3, 13, 14 N.C. No Internal Connection
— 2 COMB Analog Signal B Output* (bidirectional)
4–11 — NO16-NO9 Analog Signal Inputs* (bidirectional)
— 4–11 NO8B–NO1B Analog Signal B Inputs* (bidirectional)
12 12 GND Logic Ground
14–17 — A3–A0 Logic Address Inputs
— 15, 16, 17 A2, A1, A0 Logic Address Inputs
18 18 EN Logic Enable Input
19–26 — NO1–NO8 Analog Signal Inputs* (bidirectional)
— 19–26 NO1A–NO8A Analog Signal A Inputs* (bidirectional)
27 27 V- Negative Supply-Voltage Input. Connect to GND for single-supply operation.
28 — COM Analog Signal Output* (bidirectional)
— 28 COMA Analog Signal A Output* (bidirectional)
V
g
NO
COM
V-
V+
MAX336
MAX337
MAX336/MAX337 16-Channel/Dual 8-Channel,
Low-Leakage, CMOS Analog Multiplexers
www.maximintegrated.com
Maxim Integrated │ 6
Pin Description