ANALOG DEVICES ADG3241 Service Manual

A

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2.5 V/3.3 V, 1-Bit, 2-Port

Level Translator Bus Switch in SOT-66

FEATURES

225 ps propagation delay through the switch

4.5 Ω switch connection between ports
Data rate 1.5 Gbps

2.5 V/3.3 V supply operation
Selectable level shifting/translation
Level translation

3.3 V to 2.5 V

3.3 V to 1.8 V

2.5 V to 1.8 V
Small signal bandwidth 770 MHz
Tiny 6-lead SC70 package and 6-lead SOT-66 package

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 swap
Hot plug
Analog switch applications

GENERAL DESCRIPTION

The ADG3241 is a 2.5 V or 3.3 V single digital switch. It is
designed on a low voltage CMOS process that provides low
power dissipation yet gives high switching speed and very low
on resistance. This allows the input to be connected to the
output without additional propagation delay or generating
additional ground bounce noise.

BE

The switch is enabled by means of the bus enable (
signal. This digital switch allows a bidirectional signal 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.
W

hen operated from a 3.3 V supply, level translation from 3.3 V
inputs to 2.5 V outputs is allowed. Similarly, if the device is
operated from a 2.5 V supply and 2.5 V inputs are applied, the
device translates the outputs to 1.8 V. In addition to this, a level

) input

ADG3241

FUNCTIONAL BLOCK DIAGRAM

B

BE

Figure 1.

translating select pin (
reduced internally, allowing for level translation between 3.3 V
inputs and 1.8 V outputs. This makes the device suited to
applications requiring level translation between different
supplies, such as converter to DSP/microcontroller interfacing.

SEL

) is included. When

PRODUCT HIGHLIGHTS

1. 3.3 V or 2.5 V supply operation.

2. E

xtremely low propagation delay through switch.

3. 4.5 Ω swi

4. L

5. T

tches connect inputs to outputs.

evel and voltage translation.

iny, SC70 package and SOT-66 package.

04221-001

SEL

is low, VCC is

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
rights of third parties that may result from its use. Specifications subject to change without notice. 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 owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2006 Analog Devices, Inc. All rights reserved.

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TABLE OF CONTENTS

Features.............................................................................................. 1

Timing Measurement Information.............................................. 11

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

General Description ......................................................................... 1

Product Highlights ........................................................................... 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Typical Performance Characteristics ............................................. 6

Terminology .................................................................................... 10

REVISION HISTORY

5/06 — Rev. A to Rev. B

Updated Format..................................................................Universal

Changes to Table 4............................................................................ 5

Changes to Ordering Guide......................................................... 14

10/04 — Rev. 0 to Rev. A.
C

hanges to Features.......................................................................... 1

Changes to Specifications................................................................ 2

Bus Switch Applications ................................................................ 12

Mixed Voltage Operation, Level Translation.......................... 12

3.3 V to 2.5 V Translation ......................................................... 12

2.5 V to 1.8 V Translation ......................................................... 12

3.3 V to 1.8 V Translation ......................................................... 12

Bus Isolation................................................................................ 13

Hot Plug and Hot Swap Isolation............................................. 13

Analog Switching ....................................................................... 13

High Impedance During Power-Up/Power-Down................ 13

Outline Dimensions....................................................................... 14

Ordering Guide .......................................................................... 14

Changes to Absolute Maximum Ratings........................................3

Changes to Pin Configurations .......................................................4

Changes to Ordering Guide.............................................................4

Updated Outline Dimensions....................................................... 11

7/03—Revision 0: Initial Version

Rev. B | Page 2 of 16

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SPECIFICATIONS

VCC = 2.3 V to 3.6 V, GND = 0 V, all specifications T

Table 1.

B Version
Parameter Symbol Conditions Min Typ

DC ELECTRICAL CHARACTERISTICS

Input High Voltage V
V
Input Low Voltage V
V

INH

INH

VCC = 2.7 V to 3.6 V 0.8 V

INL

INL

Input Leakage Current II ±0.01 ±1 μA
Off State Leakage Current IOZ 0 ≤ A, B ≤ VCC ±0.01 ±1 μA
On State Leakage Current 0 ≤ A, B ≤ VCC ±0.01 ±1 μA
Maximum Pass Voltage VP

CAPACITANCE3

A Port Off Capacitance CA OFF f = 1 MHz 3.5 pF
B Port Off Capacitance CB OFF f = 1 MHz 3.5 pF
A, B Port On Capacitance CA, CB ON f = 1 MHz 7 pF
Control Input Capacitance CIN f = 1 MHz 4 pF

SWITCHING CHARACTERISTICS3

Propagation Delay A to B or B to A, t
Bus Enable Time BE to A or B
Bus Disable Time BE to A or B
Bus Enable Time BE to A or B
Bus Disable Time BE to A or B
Bus Enable Time BE to A or B
Bus Disable Time BE to A or B

5

5

5

5

5

5

4

t

PD

, t

PHL

t

, t

PZH

t

, t

PHZ

t

, t

PZH

t

, t

PHZ

t

, t

PZH

t

, t

PHZ

Maximum Data Rate
Channel Jitter

DIGITAL SWITCH

On Resistance RON

POWER REQUIREMENTS

V

2.3 3.6 V

CC

Quiescent Power Supply Current ICC

Increase in ICC per Input

1

Temperature range is as follows: B Version: −40°C to +85°C.

2

Typical values are at 25°C, unless otherwise stated.

3

Guaranteed by design, not subject to production test.

4

The digital switch contributes no propagation delay other than the RC delay of the typical RON of the switch and the load capacitance when driven by an ideal voltage

source. Since the time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagation delay to the system. Propagation delay
of the digital switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.

5

See Timing Measurement Information section.

6

This current applies to the Control Pin BE only. The A and B ports contribute no significant ac or dc currents as they transition.

6

∆ICC

MIN

to T

, unless otherwise noted.1

MAX

2

Max Unit

VCC = 2.7 V to 3.6 V 2.0 V
VCC = 2.3 V to 2.7 V 1.7 V

V

PLH

PZL

PLZ

PZL

PLZ

PZL

PLZ

= 2.3 V to 2.7 V 0.7 V

CC

= VCC = SEL = 3.3 V, IO = −5 μA

V

A/VB

= VCC = SEL = 2.5 V, IO = −5 μA

V

A/VB

= VCC = 3.3 V, SEL = 0 V, IO = −5 μA

V

A/VB

= 50 pF, VCC = SEL = 3 V

C

L

= 3.0 V to 3.6 V; SEL = VCC

V

CC

= 3.0 V to 3.6 V; SEL = VCC

V

CC

= 3.0 V to 3.6 V; SEL = 0 V

V

CC

= 3.0 V to 3.6 V; SEL = 0 V

V

CC

= 2.3 V to 2.7 V; SEL = VCC

V

CC

= 2.3 V to 2.7 V; SEL = VCC

V

CC

= SEL = 3.3 V; VA/VB = 2 V

V

CC

= SEL = 3.3 V; VA/VB = 2 V

V

CC

= 3 V, SEL = VCC, VA = 0 V, IBA = 8 mA

V

CC

= 3 V, SEL = VCC, VA = 1.7 V, IBA = 8 mA

V

CC

= 2.3 V, SEL = VCC, VA = 0 V, IBA = 8 mA

V

CC

= 2.3 V, SEL = VCC, VA = 1 V, IBA = 8 mA

V

CC

= 3 V, SEL = 0 V, VA = 0 V, IBA = 8 mA

V

CC

= 3 V, SEL = 0 V, VA = 1 V, IBA = 8 mA

V

CC

Digital Inputs = 0 V or V
Digital Inputs = 0 V or V

= 3.6 V, BE = 3.0 V; SEL = VCC

V

CC

; SEL = VCC

CC

; SEL = 0 V

CC

2.2 2.5 2.7 V

1.5 1.8 2.1 V

1.5 1.8 2.1 V

0.225 ns
1 3.2 4.6 ns
1 3 4 ns
1 3 4 ns
1 2.5 3.8 ns
1 3 4 ns
1 2.5 3.4 ns

1.5 Gbps
45 ps p-p

4.5 8 Ω
12 28 Ω
5 9 Ω
9 18 Ω
5 8 Ω
12 Ω

0.01 1 μA

0.1 0.2 mA

0.15 8 μA

Rev. B | Page 3 of 16

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ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise noted.

Table 2.

Parameter Rating

VCC to GND −0.5 V to +4.6 V
Digital Inputs to GND −0.5 V to +4.6 V
DC Input Voltage −0.5 V to +4.6 V
DC Output Current 25 mA per channel
Operating Temperature Range

Industrial (B Version) −40°C to +85°C
Storage Temperature Range −65°C to +150°C
Junction Temperature 150°C
SC70 Package

θJA Thermal Impedance 332°C/W
SOT-66 Package

θJA Thermal Impedance 191°C/W (4-layer board)
Lead Temperature, Soldering (10 sec) 300°C
IR Reflow, Peak Temperature

(<20 sec)

235°C

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Only one absolute maximum rating can be applied at any one
time.

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on
the human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Rev. B | Page 4 of 16

ADG3241

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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

BE SEL

1

ADG3241

ND

2

TOP VIEW

(Not to Scale)

A

3

Figure 2. 6-Lead SC70

Table 3. Pin Function Descriptions

Pin No.

SC70 SOT-66 Mnemonic Description

1 6 Bus Enable (Active Low)
2 4 GND Ground Reference
3 3 A
4 5 B
5 1 V

6 2 Level Translation Select

6

V

5

CC

B

4

04221-002

V

CC

SEL

A

Figure 3. 6-Lead SOT-66

BE

Port A, Input or Output
Port B, Input or Output

Positive Power Supply Voltage

CC

SEL

1

ADG3241

2

TOP VI EW

3

(Not to Scale)

6

BE

5

B

4

GND

04221-003

Table 4. Truth Table

BE SEL

1

Function

L L A = B, 3.3 V to 1.8 V level shifting
L H A = B, 3.3 V to 2.5 V/2.5 V to 1.8 V level shifting
H X Disconnect

1

SEL

= 0 V only when VDD = 3.3 V ± 10%.

Rev. B | Page 5 of 16