ADG3247BRU-REEL7 Analog Devices Inc, ADG3247BRU-REEL7 Datasheet

ADG3247BRU-REEL7

Manufacturer Part Number

ADG3247BRU-REEL7

Description

IC SW BUS 2.5/3.3V 16BIT 38TSSOP

Manufacturer

Analog Devices Inc

Type

Bus Switchr

Datasheet

1.ADG3247BCPZ.pdf (12 pages)

Specifications of ADG3247BRU-REEL7

Rohs Status

RoHS non-compliant

Circuit

8 x 1:1

Independent Circuits

Voltage Supply Source

Single Supply

Voltage - Supply

2.5V, 3.3V

Mounting Type

Surface Mount

Package / Case

38-TSSOP

Operating Temperature

Current - Output High, Low

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GENERAL DESCRIPTION

The ADG3247 is a 2.5 V or 3.3 V 16-bit, 2-port digital switch.

It is designed on Analog Devices’ low voltage CMOS process,

which provides low power dissipation yet gives high switching

speed and very low on resistance, allowing inputs to be connected

to outputs without additional propagation delay or generating

additional ground bounce noise.

The ADG3247 is organized as dual 8-bit bus switches with

separate bus enable (BEx) inputs. This allows the device to be

used as two 8-bit digital switches or one 16-bit bus switch. These

bus switches allow bidirectional signals to be switched when ON.

In the OFF condition, signal levels up to the supplies are blocked.

This device is ideal for applications requiring level translation.

When operated from a 3.3 V supply, level translation from 3.3 V

inputs to 2.5 V outputs occurs. Similarly, if the device is operated

from a 2.5 V supply and 2.5 V inputs are applied, the device will

translate the outputs to 1.8 V. In addition to this, the ADG3247

has a level translating select pin (SEL). When SEL is low, V

reduced internally, allowing for level translation between 3.3 V

inputs and 1.8 V outputs. This makes the device suited to appli-

cations requiring level translation between different supplies, such

as converter to DSP/microcontroller interfacing.

REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective companies.

FEATURES

225 ps Propagation Delay through the Switch

4.5

Data Rate 1.244 Gbps

2.5 V/3.3 V Supply Operation

Selectable Level Shifting/Translation

Small Signal Bandwidth 610 MHz

Level Translation

40-Lead 6 mm

APPLICATIONS

3.3 V to 1.8 V Voltage Translation

3.3 V to 2.5 V Voltage Translation

2.5 V to 1.8 V Voltage Translation

Bus Switching

Bus Isolation

Hot Plug

Hot Swap

Analog Switching Applications

3.3 V to 2.5 V

3.3 V to 1.8 V

2.5 V to 1.8 V

Packages

Switch Connection between Ports

6 mm LFCSP and 38-Lead TSSOP

PRODUCT HIGHLIGHTS

1. 3.3 V or 2.5 V supply operation

2. Extremely low propagation delay through switch

3. 4.5 W switches connect inputs to outputs

4. Level/voltage translation

5. 40-lead 6 mm

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

Level Translating, Bus Switch

2.5 V/3.3 V, 16-Bit, 2-Port

FUNCTIONAL BLOCK DIAGRAM

BE1

BE2

A15

6 mm LFCSP and 38-lead TSSOP packages

ADG3247

B15

www.analog.com

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ADG3247BRU-REEL7 Summary of contents

Page 1

FEATURES 225 ps Propagation Delay through the Switch 4.5 Switch Connection between Ports Data Rate 1.244 Gbps 2.5 V/3.3 V Supply Operation Selectable Level Shifting/Translation Small Signal Bandwidth 610 MHz Level Translation 3 2 ...

Page 2

ADG3247–SPECIFICATIONS Parameter DC ELECTRICAL CHARACTERISTICS Input High Voltage Input Low Voltage Input Leakage Current OFF State Leakage Current ON State Leakage Current Maximum Pass Voltage 3 CAPACITANCE A Port Off Capacitance B Port Off Capacitance A, B Port On Capacitance ...

Page 3

... Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C Model Temperature Range ADG3247BCP –40°C to +85°C ADG3247BCP-REEL7 –40°C to +85°C ADG3247BRU –40°C to +85°C ADG3247BRU-REEL7 –40°C to +85°C Table I. Pin Description Mnemonic Description BEx Bus Enable (Active Low) SEL Level Translation Select Ax ...

Page 4

ADG3247 V Positive Power Supply Voltage. CC GND Ground (0 V) Reference. V Minimum Input Voltage for Logic 1. INH V Maximum Input Voltage for Logic 0. INL I Input Leakage Current at the Control Inputs OFF State ...

Page 5

SEL = 3. 3. 0.5 1.0 1.5 2.0 2.5 3.0 3 ...

Page 6

ADG3247 3 2 2.0 = 3.3V; SEL = 1.5 = SEL = 3. 1.0 0.5 = SEL = 2. ...

Page 7

SEL = 3. p 20dB ATTENUATION EYE WIDTH = ((CLOCK PERIOD – 55 JITTER p-p)/CLOCK PERIOD) 100% 50 0.5 0.6 0.7 0.8 0.9 ...

Page 8

ADG3247 For the following load circuit and waveforms, the notation that is used OUT PULSE D.U.T. GENERATOR R T NOTES t PULSE GENERATOR FOR ALL PULSES: 2.5ns, R FREQUENCY 10MHz. C INCLUDES BOARD, ...

Page 9

BUS SWITCH APPLICATIONS Mixed Voltage Operation, Level Translation Bus switches can be used to provide an ideal solution for inter- facing between mixed voltage systems. The ADG3247 is suitable for applications where voltage translation from 3.3 V technology to a ...

Page 10

ADG3247 V OUT 3.3V SUPPLY SEL = 0V 1.8V SWITCH 0V 3.3V INPUT Figure 10. 3 1.8 V Voltage Translation, SEL = 0 V Bus Isolation A common requirement of bus architectures is low capacitance loading of the ...

Page 11

PIN 1 INDICATOR 12 MAX 1.00 0.90 0.80 SEATING PLANE 38-Lead Thin Shrink Small Outline Package [TSSOP] PIN 1 0.15 0.05 COPLANARITY REV. 0 OUTLINE DIMENSIONS 40-Lead Lead Frame Chip Scale Package [LFCSP] (CP-40) Dimensions shown in millimeters 6.00 BSC ...

Page 12

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