74ABT2244CSC Datasheet 74ABT2244CMSA, 74ABT2244CMTC, 74ABT2244CMSAX | P1-P3

tm

74ABT2244 Octal Buffer/Line Driver with 25

Ω

Series Resistors in the Outputs

March 2007

74ABT2244 Rev. 1.4

74ABT2244

Octal Buffer/Line Driver with 25

Ω

Series Resistors

in the Outputs

Features

■

Guaranteed latchup protection

■

High-impedance, glitch-free bus loading during entire

power up and power down cycle

■

Nondestructive, hot-insertion capability

General Description

The ABT2244 is an octal buffer and line driver designed

to drive the capacitive inputs of MOS memory drivers,

address drivers, clock drivers, and bus-oriented trans-

mitters/receivers.

The 25

Ω

series resistors in the outputs reduce ringing

and eliminate the need for external resistors.

Ordering Information

Devices are also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering number.

Pb-Free package per JEDEC J-STD-020B.

Connection Diagram

Pin Descriptions

Schematic of Each Output

Truth Table

H

=

HIGH Voltage Level X

=

Immaterial

L

=

LOW Voltage Level Z

=

High Impedance

Order Number

Package

Number Package Description

74ABT2244CSC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74ABT2244CSJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74ABT2244CMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), JEDEC MO-150, 5.3mm Wide

74ABT2244CMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153,

4.4mm Wide

Pin Names Description

OE

1

, OE

2

Output Enable Input (Active LOW)

I

0

–I

7

Inputs

O

0

–O

7

Outputs

OE

1

I

0–3

O

0–3

OE

2

I

4–7

O

4–7

HXZHXZ

LHHLHH

LLLLLL

74ABT2244 Octal Buffer/Line Driver with 25

Ω

Series Resistors in the Outputs

74ABT2244 Rev. 1.4 2

Absolute Maximum Ratings

Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be

operable above the recommended operating conditions and stressing the parts to these levels is not recommended.

In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.

The absolute maximum ratings are stress ratings only.

Recommended Operating Conditions

The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended

operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not

recommend exceeding them or designing to absolute maximum ratings.

Symbol Parameter Rating

T

STG

Storage Temperature –65°C to +150°C

T

A

Ambient Temperature Under Bias –55°C to +125°C

T

J

Junction Temperature Under Bias –55°C to +150°C

V

CC

V

CC

Pin Potential to Ground Pin –0.5V to +7.0V

V

IN

Input Voltage

(1)

–0.5V to +7.0V

I

IN

Input Current

(1)

–30mA to +5.0mA

V

O

Voltage Applied to Any Output

Disabled or Power-off State

HIGH State

–0.5V to 5.5V

–0.5V to V

CC

Current Applied to Output in LOW State (Max.) twice the rated I

OL

(mA)

DC Latchup Source Current (Across Comm Operating Range) –300mA

Over Voltage Latchup (I/O) 10V

Symbol Parameter Rating

T

A

Free Air Ambient Temperature –40°C to +85°C

V

CC

Supply Voltage +4.5V to +5.5V

∆

V

/

∆

t Minimum Input Edge Rate

Data Input

Enable Input

50mV/ns

20mV/ns

74ABT2244 Octal Buffer/Line Driver with 25

Ω

Series Resistors in the Outputs

74ABT2244 Rev. 1.4 3

DC Electrical Characteristics

Notes:

1. Either voltage limit or current limit is sufficient to protect inputs.

2. For 8-bit toggling, I

CCD

<

0.8mA/MHz.

3. Guaranteed, but not tested.

Symbol Parameter

V

CC

Conditions Min. Typ. Max. Units

V

IH

Input HIGH Voltage Recognized HIGH Signal 2.0 V

V

IL

Input LOW Voltage Recognized LOW Signal 0.8 V

V

CD

Input Clamp Diode Voltage Min. I

IN

=

–18mA –1.2 V

V

OH

Output HIGH Min. I

OH

=

–3mA 2.5 V

I

OH

=

–32mA 2.0

V

OL

Output LOW Voltage Min. I

OL

=

15mA 0.8 V

I

IH

Input HIGH Current Max. V

IN

=

2.7V

(3)

1µA

V

IN

=

V

CC

1

I

BVI

Input HIGH Current Breakdown

Test

Max. V

IN

=

7.0V 7 µA

I

IL

Input LOW Current Max. V

IN

=

0.5V

(3)

–1 µA

V

IN

=

0.0V –1

V

ID

Input Leakage Test 0.0 I

ID

=

1.9µA, All Other Pins

Grounded

475 V

I

OZH

Output Leakage Current 0–5.5V V

OUT

=

2.7V; OEn

=

2.0V 10 µA

I

OZL

V

OUT

=

0.5V; OEn

=

2.0V –10

I

OS

Output Short-Circuit Current Max. V

OUT

=

0.0V –100 –275 mA

I

CEX

Output HIGH Leakage Current Max. V

OUT

=

V

CC

50 µA

I

ZZ

Bus Drainage Test 0.0 V

OUT

=

5.5V, All Others GND 100 µA

I

CCH

Power Supply Current Max. All Outputs HIGH 50 µA

I

CCL

All Outputs LOW 30 mA

I

CCZ

Power Supply Current Max. OEn

=

V

CC

, All Others at V

CC

or GND

50 µA

I

CCT

Additional

I

CC

/Input

Outputs Enabled Max. V

I

=

V

CC

– 2.1V 2.5 mA

Outputs 3-STATE Enable Input V

I

=

V

CC

– 2.1V 2.5 mA

Outputs 3-STATE Data Input V

I

=

V

CC

– 2.1V,

All Others at V

CC

or GND

50 µA

I

CCD

Dynamic I

CC

No Load

(3)

Max.

Outputs OPEN, OEn = GND

(2)

,

One-Bit Toggling,

50% Duty Cycle

0.1 mA/

MHz

74ABT2244CSC

74ABT2244CSC

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