Datasheet
Detailed Description
The MAX4699/MAX4701 are low-voltage CMOS analog
switches that operate from a single +1.8V to +5.5V
power supply. The MAX4702 requires an additional
logic supply that allows for setting lower logic thresh-
olds. The MAX4699/MAX4701 are double-pole/double-
throw (DPDT) devices. The MAX4702 is a quad
single-pole/double-throw (SPDT) device. These devices
feature a break-before-make switching, fast switching
speeds (with V+ = 5V: t
ON
= 18ns max, t
OFF
= 9ns max
and with V+ = 3V: t
ON
= 35ns, t
OFF
= 20) and rail-to-rail
signal handling. A logic input on the MAX4702 allows
for logic thresholds as low as 1.0V.
Applications Information
Analog Signal Levels
Analog signals that range over the entire supply voltage
(V+ to GND) can be passed with very little change in on-
resistance (see
Typical Operating Characteristics
). The
switches are bidirectional, so the NO, NC, and COM pins
can be used as either inputs or outputs.
_______________________________________________________________________________________ 7
MAX4699/MAX4701/MAX4702
Low-Voltage, Dual DPDT/Quad SPDT
Analog Switches in QFN
Pin Description
TQFN-EP PIN TSSOP PIN
MAX4699/
MAX4701
MAX4702 MAX4701 MAX4702
NAME FUNCTION
1 1 3 3 NC1 Analog Switch 1—Normally Closed Terminal
— 2 — 4 IN Digital Control Input Switch 1, 2, 3, and 4
2 — 4 — IN1, IN2 Digital Control Input Switch 1 and 2
3 3 5 5 NO2 Analog Switch 2—Normally Open Terminal
4 4 6 6 COM2 Analog Switch 2—Common Terminal
5 5 7 7 NC2 Analog Switch 2—Normally Closed Terminal
6 6 8 8 GND Ground
7 7 9 9 NO3 Analog Switch 3—Normally Open Terminal
8 8 10 10 COM3 Analog Switch 3—Common Terminal
9 9 11 11 NC3 Analog Switch 3—Normally Closed Terminal
— 10 — 12 V
L
Logic Power-Supply Input
10 — 12 — IN3, IN4 Digital Control Input Switch 3 and 4
11 11 13 13 NO4 Analog Switch 4—Normally Open Terminal
12 12 14 14 COM4 Analog Switch 4—Common Terminal
13 13 15 15 NC4 Analog Switch 4—Normally Closed Terminal
14 14 16 16 V+ Positive Supply Voltage Input
15 15 1 1 NO1 Analog Switch 1—Normally Open Terminal
16 16 2 2 COM1 Analog Switch 1—Common Terminal
— — — — EP Exposed Pad (TQFN Only). Connect EP to GND.
POSITIVE SUPPLY
COM
NO
D2
D1
GND
V
g
V+
MAX4699
MAX4701
MAX4702
Figure 1. Overvoltage Protection Using Two External Blocking
Diodes