Fairchild Semiconductor 74ABT2244CSJX, 74ABT2244CSJ, 74ABT2244CSCX, 74ABT2244CSC, 74ABT2244CPC Datasheet

© 1999 Fairchild Semiconductor Corporation DS010991 www.fairchildsemi.com

May 1992

Revised November 1999

74ABT2244 Octal Buffer/Line Driver with 25Ω Series Resistors in the Outputs

74ABT2244

Octal Buffer/Line Driver with

25Ω Series Resistors in the Outputs

General Description

The ABT2244 is an octal buffer and line driver desig ned to

drive the capacitive inputs of MOS memory drivers,

address drivers, clock drivers, an d bus-oriented transmit-

ters/receivers.

The 25Ω series resist ors i n the outputs reduc e r inging a nd

eliminate the need for external resistors.

Features

■ Guarante ed latchup protection

■ High impedance glitch-free bus loading during entire

power up and power down cycle

■ Nondestructive hot insertion capability

Ordering Code:

Devices are also avai lable in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Schematic of Each Output

Pin Descriptions

Truth T able

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

Order Number Package Number Package Description

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

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

74ABT2244CMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide

74ABT2244CMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74ABT2244CPC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” 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

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74ABT2244

Absolute Maximum Ratings(Note 1) Recommended Operating

Conditions

Note 1: Absolute maximum ratings are values beyond which the device

may be damaged or have its useful life impaired. Functional operation

under these conditi ons is not implied.

DC Electrical Characteristics

Note 2: Either voltage limit or cu rrent limit is sufficient to protec t inputs.

Note 3: For 8 bits toggling, I

CCD

< 0.8 mA/MHz.

Note 4: Guaranteed, but not tested.

Storage Temperature −65°C to +150°C

Ambient Temperature under Bias −55°C to +125°C

Junction Temperature under Bias −55°C to +150°C

V

CC

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

Input Voltage (Note 2) −0.5V to +7.0V

Input Current (Note 2) −30 mA to +5.0 mA

Voltage Applied to Any Output

in the Disabled or

Power-off State −0.5V to 5.5V

in the HIGH State −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) −300 mA

Over Voltage Latchup (I/O) 10V

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

Supply Voltage +4.5V to +5.5V

Minimum Input Edge Rate (∆V/∆t)

Data Input 50 mV/ns

Enable Input 20 mV/ns

Symbol Parameter Min Typ Max Units

V

CC

Conditions

V

IH

Input HIGH Voltage 2.0 V Recognized HIGH Signal

V

IL

Input LOW Voltage 0.8 V Recognized LOW Signal

V

CD

Input Clamp Diode Voltage −1.2 V Min I

IN

= −18 mA

V

OH

Output HIGH 2.5 V Min I

OH

= −3 mA

2.0 V Min I

OH

= −32 mA

V

OL

Output LOW Voltage 0.8 V Min I

OL

= 15 mA

I

IH

Input HIGH Current 1

µAMax

V

IN

= 2.7V (Note 4)

1V

IN

= V

CC

I

BVI

Input HIGH Current Breakdown Test 7 µAMaxV

IN

= 7.0V

I

IL

Input LOW Current −1

µAMax

V

IN

= 0.5V (Note 4)

−1V

IN

= 0.0V

V

ID

Input Leakage Test

475 V 0.0

I

ID

= 1.9 µA

All Other Pins Grounded

I

OZH

Output Leakage Current 10 µA0 − 5.5V

V

OUT

= 2.7V; OEn = 2.0V

I

OZL

Output Leakage Current −10 µA0 − 5.5V V

OUT

= 0.5V; OEn = 2.0V

I

OS

Output Short-Circuit Current −100 −275 mA Max V

OUT

= 0.0V

I

CEX

Output HIGH Leakage Current 50 µAMaxV

OUT

= V

CC

I

ZZ

Bus Drainage Test 100 µA0.0V

OUT

= 5.5V; All Others GND

I

CCH

Power Supply Current 50 µA Max All Outputs HIGH

I

CCL

Power Supply Current 30 mA Max All Outputs LOW

I

CCZ

Power Supply Current

50 µAMax

OEn = V

CC

All Others at V

CC

or GND

I

CCT

Additional Outputs Enabled 2.5 mA V

I

= V

CC

− 2.1V

I

CC

/Input Outputs 3-STATE 2.5 mA Max Enable Input V

I

= V

CC

− 2.1V

Outputs 3-STATE 50 µA Data Input V

I

= V

CC

− 2.1V

All Others at V

CC

or GND

I

CCD

Dynamic I

CC

No Load mA/ Max Outputs OPEN

(Note 4) 0.1

MHz

OEn = GND (Note 3)

One Bit Toggling, 50% Duty Cycle

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74ABT2244

AC Electrical Characteristics

(SOIC and SSOP Package)

Capacitance

Note 5: C

OUT

is measured at frequency f = 1 MHz, per MIL-STD-883, Method 3012.

Symbol Parameter

T

A

= +25°CT

A

= −40°C to +85°C

Units

V

CC

= +5V V

CC

= 4.5V–5.5V

C

L

= 50 pF C

L

= 50 pF

Min Typ Max Min Max

t

PLH

Propagation 1.0 2.2 3.9 1.0 3.9

ns

t

PHL

Delay Data to Outputs 1.0 2.9 4.4 1.0 4.4

t

PZH

Output Enable 1.5 3.7 6.0 1.5 6.0

ns

t

PZL

Time 2.1 4.3 7.0 2.1 7.0

t

PHZ

Output Disable 1.7 3.5 5.8 1.7 5.8

ns

t

PLZ

Time 1.7 3.7 5.8 1.7 5.8

Symbol Parameter Typ Units

Conditions

T

A

= 25°C

C

IN

Input Capacitance 5.0 pF V

CC

= 0V

C

OUT

(Note 5) Output Capacitance 9.0 pF V

CC

= 5.0V