MAX4674ESE Просмотр технического описания (PDF) - Maxim Integrated
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MAX4674ESE Datasheet PDF : 13 Pages
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3V/5V, 4Ω, Wideband Quad
2:1 Analog Multiplexer
QSOP/TSSOP/SO
1
2
3
4
5
6
7
—
8
9
10
11
12
13
14
15
16
—
PIN
20 QFN
20
1
2
3
4
5
6
7, 9, 17, 19
8
10
11
12
13
14
15
16
18
EP
16 QFN
15
16
1
2
3
4
5
—
6
7
8
9
10
11
12
13
14
EP
Pin Description
NAME
FUNCTION
A0
NC1
NO1
COM1
NC2
NO2
COM2
N.C.
GND
COM3
NO3
NC3
COM4
NO4
NC4
EN
V+
EP
Address Input
Normally Closed Terminal
Normally Open Terminal
Analog Switch Common Terminal
Normally Closed Terminal
Normally Open Terminal
Analog Switch Common Terminal
No Connection
Ground
Analog Switch Common Terminal
Normally Open Terminal
Normally Closed Terminal
Analog Switch Common Terminal
Normally Open Terminal
Normally Closed Terminal
Output Enable, Active Low
Positive Supply Voltage
Exposed Pad. Connect to GND.
Detailed Description
The MAX4674 is a low on-resistance (RON), low-volt-
age, quad 2:1 analog multiplexer/demultiplexer that
operates from a +1.8V to +5.5V single supply. The
MAX4674 features very fast switching speed (tON =
18ns max, tOFF = 6ns max) and guaranteed break-
before-make switching. Its low RON allows high continu-
ous currents to be switched in a variety of applications.
Digital Interface
A0 and EN are CMOS digital inputs that meet TTL logic
levels when V+ = 5V. Note that A0 and EN can exceed
the voltage at V+ to a maximum of +5.5V. This feature
allows operation of the MAX4674 from a +3.3V supply
while controlling it with 5V CMOS logic signals.
The Pin Configuration/Functional Diagram/Truth Table
located on the first page of this data sheet details the
operation of the MAX4674.
Applications Information
Power-Supply Considerations
Overview
The MAX4674 construction is typical of most CMOS
analog switches. It has two supply pins, V+ and GND,
used to drive the internal CMOS switches and set the
limits of the analog voltage on any switches. Reverse
ESD-protection diodes are internally connected
between each analog-signal pin and both V+ and
GND. If any analog signal exceeds V+ and GND, one
of these diodes conducts. During normal operation,
these and other reverse-biased ESD diodes leak, form-
ing the only current drawn from VCC or GND.
Virtually all the analog leakage current comes from the
ESD diodes. Although the ESD diodes on a given sig-
nal pin are identical and therefore fairly well balanced,
they are reverse biased differently. Each is biased by
either V+ or GND and the analog signal. This means
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