1

LTC1380/LTC1393

Single-Ended 8-Channel/

Differential 4-Channel Analog

Multiplexer with SMBus Interface

–5

150

200

250

3

1167 G15

100

50

125

175

225

75

25

0

–3

–1

1

–4

4

–2

0

2

5

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

LTC1380

0.1

µF

15k

8 ANALOG

INPUTS

15k

0.1

µF

–5V

5V

ANALOG OUTPUT

1380/93 TA01

S0

S1

S2

S3

S4

S5

S6

S7

SCL

SDA

A0

A1

GND

SMBus

HOST

SCL

SDA

LTC1380 Single-Ended 8-Channel Multiplexer

The LTC

SMBus

single-ended 8-channel multiplexer, while the LTC1393 is a

differential 4-channel multiplexer. The SMBus digital inter-

face requires only two wires (SCL and SDA). Both the

LTC1380 and the LTC1393 have four hard-wired SMBus

addresses, selectable with two external address pins. This

allows four devices, each with a unique SMBus address, to

coexist on one system and for four devices to be synchro-

nized with one stop bit.

The supply current is typically 10

µA. Both digital interface

pins are SMBus compatible over the full operating supply

voltage range. The LTC1380 analog switches feature a

20pAandguaranteedbreak-before-makeoperation.Charge

injection is

±1pC typical.

The LTC1380/LTC1393 are available in 16-lead SO and GN

packages. Operation is fully specified over the commercial

and industrial temperature ranges.

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Micropower Operation: Supply Current = 20

µA Max

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2-Wire SMBus Interface

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Single 2.7V to

±5V Supply Operation

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Expandable to 32 Single or 16 Differential Channels

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Guaranteed Break-Before-Make

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Low Charge Injection: 20pC Max

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Low Leakage:

±5nA Max

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Available in 16-Lead SO and GN Packages

FEATURES

, LTC and LT are registered trademarks of Linear Technology Corporation.

SMBus is a registered trademark of Intel Corporation.

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Data Acquisition Systems

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Process Control

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Laptop Computers

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Signal Multiplexing/Demultiplexing

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Analog-to-Digital Conversion Systems