Fairchild Semiconductor 74ALVC2245 Datasheet

74ALVC2245
Low Voltage Bidirectional Transceiver

with 3.6V Tolerant Inputs and Outputs
and 26

Ω Series Resistors in B Outputs

February 2002
Revised February 2002

74ALVC2245 Low Voltage Bidirectional Transceiver with 3.6V Tolerant Inputs and Outputs and 26

Resistors in B Outputs

General Description

The ALVC2245 contains eight non-inverting bidirectional
buffers with 3-STATE outputs and is in tended for bus ori­ented applications . The T/R
of data flow. The OE
by placing them in a high impedance state.

The 74ALVC2245 is designed for low voltage (1.65V to

3.6V) V
The ALVC2245 is also designed with 26

in the B Port outpu ts. This design reduces line nois e in
applications such as memory address drivers, cl ock driv­ers, and bus transceivers transmitters

The 74ALVC2245 is fabricated with an a dvanced CMOS
technology to achieve high-speed operation while main­taining low CMOS power dissipation.

applications with I/O compatibility up to 3.6V.

CC

input determines the direction

input disables both th e A and B ports

Ω series resistance

Features

■ 1.65V to 3.6V VCC supply operation

■ 3.6V tolerant inputs and outputs

■ 26

Ω series resistors in B Port outputs

■ Power-off high impedance inputs and outputs

■ Supports Live Insertion and Withdrawal (Note 1)

■ t

(A to B)

PD

4.9 ns max for 3.0V to 3.6V V

6.1 ns max for 2.3V to 2.7V V

9.8 ns max for 1.65V to 1.95V V

■ Uses patented Quiet Series noise/EMI reduction

circuitry

■ Latchup conforms to JEDEC JED78

■ ESD performance:

Human body model
Machine model

Note 1: To ensure the high impedance state during power up and power

should be tied to VCC through a pul l up res istor. The min imum

down, OE

n

value of the resistor is dete rmined by the curren t sourcing capabilit y of the
driver.

> 2000V

> 200V

CC
CC

CC

Ordering Code:

Order Number Package Number Package Description

74ALVC2245WM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74ALVC2245MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Devices also availab le in Tape and Reel. Specify by appending the suffix letter “X” to the o rdering code.

Logic Symbol Pin Descriptions

Pin Names Description

OE
T/R
A

0–A7

B

0–B7

Quiet Series is a tra demark of Fairchild Semiconductor Corp oration.

© 2002 Fairchild Semiconductor Corporation ds500717 www.fairchildsemi.com

Output Enable Input (Active LOW)
Transmit/Receive Input

Side A Inputs or 3-STATE Outpu ts
Side B Inputs or 3-STATE Outpu ts

Ω

Series

Connection Diagram Truth Table

74ALVC2245

Logic Diagram

Inputs

Outputs

T/R

OE

L L Bus B0–B7 Data to Bus A0–A
L H Bus A0–A7 Data to Bus B0–B

7

7

H X HIGH Z State on A0–A7, B0–B7 (Note 2)

H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance

Note 2: Unused bus terminals during HIGH Z State must be held HIGH or
LOW.

www.fairchildsemi.com 2

Absolute Maximum Ratings(Note 3) Recommended Operating

Supply Voltage (VCC) −0.5V to +4.6V
DC Input Voltage (V
Output Voltage (V
DC Input Diode Current (I

V

< 0V −50 mA

I

DC Output Diode Current (I

< 0V −50 mA

V

O

) −0.5V to 4.6V

I

) (Note 4) −0.5V to VCC +0.5V

O

)

IK

)

OK

DC Output Source/Sink Current

(I

) ±50 mA

OH/IOL

or GND Current per

DC V

CC

Supply Pin (I

Storage Temperature Range (T

or GND) ±100 mA

CC

) −65°C to +150°C

STG

Conditions

Power Supply

Operating 1.65V to 3.6V
Input Voltage 0V to V
Output Voltage (VO)0V to V
Free Air Operating Temperature (TA) −40°C to +85°C
Minimum Input Edge Rate (

= 0.8V to 2.0V, VCC = 3.0V 10 ns/V

V

IN

Note 3: The Absolute Maxi mum Ratings are thos e values beyond which
the safety of the d evice cannot b e guaranteed . The device sh ould not be
operated at these limit s. The parametric values defi ned in the Electrical
Characteristics tables are not guaranteed at the Absolute Maximum Rat­ings. The “Recommended Operating Conditions” table will define the condi­tions for actual device operation.

Absolute Maximum Rating must be observed.

Note 4: I

O

Note 5: Floating or unused control inputs must be held HIGH or LOW.

(Note 5)

∆t/∆V)

DC Electrical Characteristics

V

Symbol Parameter Conditions

V

IH

V

IL

V

OH

V

OL

I

I

I

CC

HIGH Level Input Voltage 1.65 - 1.95 0.65 x V

LOW Level Input Voltage 1.65 - 1.95 0.35 x V

HIGH Level Output Voltage IOH = −100 µA 1.65 - 3.6 VCC - 0.2
A Outputs IOH = −4 mA 1.65 1.2

HIGH Level Output Voltage IOH = −100 µA 1.65 - 3.6 VCC - 0.2
B Outputs I

LOW Level Output Voltage IOL = 100 µA 1.65 - 3.6 0.2
A Outputs IOL = 4 mA 1.65 0.45

LOW Level Output Voltage IOL = 100 µA 1.65 - 3.6 0.2
B Outputs IOL = 2 mA 1.65 0.45

Input Leakage Current 0 ≤ VI ≤ 3.6V 1.65 - 3.6 ±5.0 µA
Quiescent Supply Current VI = VCC or GND, IO = 0 3.6 40 µA

I

= −6 mA 2.3 2.0

OH

= −12 mA 2.3 1.7

I

OH

IOH = −24 mA 3.0 2

= −2 mA 1.65 1.2

OH

= −4 mA 2.3 1.9

I

OH

IOH = −6 mA 2.3 1.7

IOH = −8 mA 2.7 2
IOH = −12 mA 3.0 2

IOL = 6 mA 2.3 0.4
IOL = 12 mA 2.3 0.7

IOL = 24 mA 3.0 0.55

IOL = 4 mA 2.3 0.4
IOL = 6 mA 2.3 0.55

IOL = 8 mA 2.7 0.6
IOL = 12 mA 3.0 0.8

CC

(V)

2.7 - 3.6 2.0

2.7 - 3.6 0.8

2.7 2.2

3.0 2.4

3.0 2.4

2.7 0.4

3.0 0.55

Min Max Units

CC

74ALVC2245

CC
CC

V2.3 - 2.7 1.7

CC

V2.3 - 2.7 0.7

V

V

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