Fairchild Semiconductor 74ACQ244SJ, 74ACQ244SCX, 74ACQ244SC, 74ACQ244PC, 74ACQ244SJX Datasheet

© 1999 Fairchild Semiconductor Corporation DS010235 www.fairchildsemi.com

July 1989
Revised November 1999

74ACQ244 • 74ACTQ244 Quiet Series Octal Buffer/Line Driver with 3-STATE Outputs

74ACQ244 • 74ACTQ244
Quiet Series Octal Buffer/Line Driver

with 3-STA TE Outputs

General Description

The ACQ/ACTQ244 is an octal buffer and line driver
designed to be employed as a memory address driver,
clock driver and bus or iented tra nsmitter or receive r which
provides improved PC board density. The ACQ/ACTQ uti­lizes Fairchild Quiet Series technology to guarantee quiet
output switching and improved dynamic threshold pe rfor­mance. FACT Quiet Series features GTO output control
and undershoot correcto r in addition t o a split ground bus
for superior performance.

Features

■ ICC and IOZ reduced by 5 0%

■ Guaranteed simultaneous switching noise level and

dynamic threshold performan ce

■ Guarante ed pin-to-pin skew AC performance

■ Improved latch-up immunity

■ 3-STATE outputs drive bus lines or buffer memory

address registers

■ Outputs source/sink 24 mA

■ Faster prop delays than the standard AC/ACT244

Ordering Code:

Device also available in Tape and Reel. Specify by appending s uffix let te r “X” to the ordering code.

Connection Diagram Pin Descriptions

FACT, Qui et Series , FACT Quiet Series, an d GTO are trademarks of Fairchild Semiconductor Corporation.

Order Number Package Number Package Description

74ACQ244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACQ244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACQ244PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide
74ACTQ244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ACTQ244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ACTQ244QSC MQA20 20-Lead Quarter Size Outline Packag e (Q SOP ), JED EC MO -13 7, 0.15 0” Wide
74ACTQ244MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ACTQ244PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

Pin Names Description

OE

1

, OE

2

3-STATE Output Enable Inputs

I

0–I 7

Inputs

O

0–O 7

Outputs

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74ACQ244 • 74ACTQ244

Logic Symbol

IEE/IEC

Tr uth Tables

H = HIGH Voltage Level
L = LOW Voltage Level
X = Inmaterial
Z = HIGH Impedance

Inputs Outputs

OE

1

In (Pins 12, 14, 16, 18)

LL L
LH H
HX Z

Inputs Outputs

OE

2

In (Pins 3, 5, 7, 9)

LL L
LH H
HX Z

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74ACQ244 • 74ACTQ244

Absolute Maximum Ratings(Note 1) Recommended Operating

Conditions

Note 1: Absolute max imum rating s are those va lues beyon d w hich damage

to the device may occu r. The databook spe cificatio ns shou ld be met, wit h­out exception, to ensure that the system de sign is relia ble over its p ower
supply, temperature, and output/input loading variables. Fairchild does not
recommend operation of FACT circuits outside databook specificat ions.

DC Electrical Characteristics for ACQ

Supply Voltage (VCC) −0.5V to +7.0V
DC Input Diode Current (I

IK

)

V

I

= −0.5V −20 mA

V

I

= VCC + 0.5V +20 mA

DC Input Voltage (V

I

) −0.5V to VCC + 0.5V

DC Output Diode Current (I

OK

)

V

O

= −0.5V −20 mA

V

O

= VCC + 0.5V +20 mA

DC Output Voltage (V

O

) −0.5V to V

CC

+ 0.5V

DC Output S ource

or Sink Current (I

O

) ±50 mA

DC V

CC

or Ground Current

per Output Pin (I

CC

or I

GND

) ±50 mA

Storage Temperature (T

STG

) −65°C to +150°C

DC Latch-Up Source or

Sink Current ±300 mA

Junction Temperature (T

J

)

PDIP 140°C

Supply Voltage (V

CC

)
ACQ 2.0V to 6.0V
ACTQ 4.5V to 5.5V

Input Voltage (V

I

)0V to V

CC

Output Voltage (VO)0V to V

CC

Operating Temperature (TA) −40°C to +85°C
Minimum Input Edge Rate ∆V/∆t

ACQ Devices
V

IN

from 30% to 70% of V

CC

VCC @ 3.0V, 4.5V, 5.5V 125 mV/ns

Minimum Input Edge Rate ∆V/∆t

ACTQ Devices
V

IN

from 0.8V to 2.0V

V

CC

@ 4.5V, 5.5V 125 mV/ns

Symbol Parameter

V

CC

TA = +25°C TA = −40°C to +85°C

Units Conditions

(V) Typ Guaranteed Limits

V

IH

Minimum HIGH Level 3.0 1.5 2.1 2.1 V

OUT

= 0.1V

Input Voltage 4.5 2.25 3.15 3.15 V or VCC − 0.1V

5.5 2.75 3.85 3.85

V

IL

Maximum LOW Level 3.0 1.5 0.9 0.9 V

OUT

= 0.1V

Input Voltage 4.5 2.25 1.35 1.35 V or VCC − 0.1V

5.5 2.75 1.65 1.65

V

OH

Minimum HIGH Level 3.0 2.99 2.9 2.9
Output Voltage 4.5 4.49 4.4 4.4 V I

OUT

= −50 µA

5.5 5.49 5.4 5.4
VIN = VIL or V

IH

3.0 2.56 2.46 IOH = −12 mA

4.5 3.86 3.76 V I

OH

= −24 mA

5.5 4.86 4.76 I

OH

= −24 mA (Note 2)

V

OL

Maximum LOW Level 3.0 0.002 0.1 0.1
Output Voltage 4.5 0.001 0.1 0.1 V I

OUT

= 50 µA

5.5 0.001 0.1 0.1
VIN = VIL or V

IH

3.0 0.36 0.44 IOL = 12 mA

4.5 0.36 0.44 V IOL = 24 mA

5.5 0.36 0.44 IOL = 24 mA (Note 2)

I

IN

Maximum Input

5.5 ±0.1 ±1.0 µAVI = VCC, GND

(Note 4) Leakage Current
I

OLD

Minimum Dynamic 5.5 75 mA V

OLD

= 1.65V Max

I

OHD

Output Current (Note 3) 5.5 −75 mA V

OHD

= 3.85V Min

ICC Maximum Quiescent

5.5 4.0 40.0 µAVIN = VCC or GND

(Note 4) Supply Current
I

OZ

Maximum 3-STATE VI(OE) = VIL, V

IH

Leakage Current 5.5 ±0.25 ±2.5 µAVI = VCC, GND

VO = VCC, GND