ADG3249BRJ-R2 datasheet(8/12 Pages) AD

Part #	ADG3249BRJ-R2

Description	2.5 V/3.3 V, 2:1 Multiplexer/ Demultiplexer Bus Switch

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Manufacturer	AD [Analog Devices]

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8 / 12 page

REV. 0

–8–

ADG3249

For the following load circuit and waveforms, the notation that is used is VIN and VOUT where

VV and V

V or V

V and V

V

IN

A

OUT

B

IN

B

OUT

A

==

CONTROL

INPUT

EN

0V

tPLH

VOUT

VT

VIH

VH

VT

VL

tPLH

Figure 2. Propagation Delay

VCC

VIN

VOUT

CL

RL

SW1

GND

2

VCC

RT

DUT

PULSE

GENERATOR

NOTES

PULSE GENERATOR FOR ALL PULSES: tR 2.5ns, tF 2.5ns,

FREQUENCY

10MHz.

CL INCLUDES BOARD, STRAY, AND LOAD CAPACITANCES.

RT IS THE TERMINATION RESISTOR, SHOULD BE EQUAL TO ZOUT

OF THE PULSE GENERATOR.

Figure 1. Load Circuit

TIMING MEASUREMENT INFORMATION

ENABLE

DISABLE

CONTROL INPUT

EN

VIN = 0V

VIN = VCC

VOUT

SW1 @ 2VCC

VOUT

SW1 @ GND

tPLZ

tPZH

tPHZ

tPZL

VT

0V

VCC

VT

VH

VH –V

VL

VL + V

VCC

0V

VT

VINH

0V

Figure 3. Enable and Disable Times

Table III. Switch Position

Test

S1

tPLZ, tPZL

2

× V

CC

tPHZ, tPZH

GND

Test Conditions

Symbol

VCC = 3.3 V

± 0.3 V (SEL = V

CC)VCC = 2.5 V

± 0.2 V (SEL = V

CC)VCC = 3.3 V

± 0.3 V (SEL = 0 V) Unit

RL

500

Ω

V

300

150

mV

CL

50

30

pF

VT

1.5

0.9

V

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