Datasheet 74ACT244SJX, 74ACT244SJ, 74ACT244SCX, 74ACT244SC, 74ACT244PC Datasheet (Fairchild Semiconductor)

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November 1988 Revised November 1999

74AC244 • 74ACT244 Octal Buffer/Line Driver with 3-STATE Outputs

74AC244 • 74ACT244 Octal Buffer/Line Driv e r wit h 3- S TATE Outputs

General Description

The AC/ACT244 is an octal buffe r and line dr iver de signed to be employed as a memory addre ss driver, clock driver and bus-oriented transmitter/receiver which provides improved PC board densi ty.

Features

■ ICC and IOZ reduced by 5 0%

■ 3-STATE outputs drive bus lines or buffer memory

address registers

■ Outputs source/sink 24 mA

■ ACT244 has TTL-compatible inputs

Ordering Code:

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

Logic Symbol

IEEE/IEC

Connection Diagram

Pin Descriptions

Tru th Tables

X = Immaterial Z = High Impedance

FACT is a trademark of Fairchild Semiconductor Corporation.

Order Number Package Number Package Description

74AC244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body 74AC244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74AC244MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74AC244PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide 74ACT244SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body 74ACT244SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74ACT244MSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide 74ACT244MTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74ACT244PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

Pin Names Description

, OE

3-STATE Output Enable Inputs

0–I7

Inputs

0–O7

Outputs

Inputs Outputs

(Pins 12, 14, 16, 18)

LL L LH H HX Z

Inputs Outputs

(Pins 3, 5, 7, 9)

LL L LH H HX Z

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74AC244 • 74ACT244

Absolute Maximum Ratings(Note 1) Recommended Operating

Conditions

Note 1: Absolute maximum ratings are those values beyond which damage

to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, and ou tput/inp ut loadi ng varia bles. Fairchild does no t recommend operat ion of FACT circuits outside da t abook specifications.

DC Electrical Characteristics for AC

Note 2: All outputs loaded; thresholds on input assoc iat ed with output under tes t. Note 3: Maximum test duratio n 2. 0 ms, one output loaded at a time. Note 4: I

and ICC @ 3.0V are guaranteed to be less than or equa l to th e respective limit @ 5.5V VCC.

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

)

= −0.5V −20 mA

= VCC + 0.5V +20 mA

DC Input Voltage (V

) −0.5V to VCC + 0.5V

DC Output Diode Current (I

)

= −0.5V −20 mA

= VCC + 0.5V +20 mA

DC Output Voltage (V

) −0.5V to VCC + 0.5V

DC Output Source

or Sink Current (I

) ±50 mA

DC V

or Ground Current

per Output Pin (I

or I

GND

) ±50 mA

Storage Temperature (T

STG

) −65°C to +150°C

Junction Temperature (T

)

PDIP 140°C

Supply Voltage (V

) AC 2.0V to 6.0V ACT 4.5V to 5.5V

Input Voltage (V

) 0V to V

Output Voltage (VO) 0V to V

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

AC Devices V

from 30% to 70% of V

VCC @ 3.3V, 4.5V, 5.5V 125 mV/ns

Minimum Input Edge Rate (∆V/∆t)

ACT Devices V

from 0.8V to 2.0V

@ 4.5V, 5.5V 125 mV/ns

Symbol Parameter

TA = +25°CTA = −55°Cto+125°CTA = −40°Cto+85°C

Units Conditions

(V) Typ Guaranteed Limits

Minimum HIGH Level 3.0 1.5 2.1 2.1 2.1 V

OUT

= 0.1V

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

5.5 2.75 3.85 3.85 3.85

Maximum LOW Level 3.0 1.5 0.9 0.9 0.9 V

OUT

= 0.1V

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

5.5 2.75 1.65 1.65 1.65

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

OUT

= −50 µA

5.5 5.49 5.4 5.4 5.4

3.0 2.56 2.4 2.46 IOH = 12 mA

4.5 3.86 3.7 3.76 V IOH = 24 mA

5.5 4.86 4.7 4.76 I

= 24 mA (Note 2)

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

OUT

= 50 µA

5.5 0.001 0.1 0.1 0.1

3.0 0.36 0.50 0.44 IOL = 12 mA

4.5 0.36 0.50 0.44 V IOL = 24 mA

5.5 0.36 0.50 0.44 IOL = 24 mA (Note 2)

Maximum Input

5.5 ±0.1 ±1.0 ±1.0 µAVI = VCC, GND

(Note 4) Leakage Current I

Maximum VI (OE) = VIL, V

3-STATE 5.5 ±0.25 ±5.0 ±2.5 µAVI = VCC, V

GND

Current VO = VCC, GND

OLD

Minimum Dynamic 5.5 50 75 mA V

OLD

= 1.65V Max

OHD

Output Current (Note 3) 5.5 −50 −75 mA V

OHD

= 3.85V Min

Maximum Quiescent

5.5 4.0 80.0 40.0 µA

VIN = V

(Note 4) Supply Current or GND

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74AC244 • 74ACT244

DC Electrical Characteristics for ACT

Note 5: All outputs loaded; thres holds on input associate d w it h output under test. Note 6: Maximum test duration 2.0 ms, one output loaded at a time.

Symbol Parameter

TA = +25°CTA = −55°Cto+125°CTA =−40°Cto+85°C

Units Conditions

(V) Typ Guaranteed Limits

Minimum HIGH Level 4.5 1.5 2.0 2.0 2.0

OUT

= 0.1V

Input Voltage 5.5 1.5 2.0 2.0 2.0 or VCC − 0.1V

Maximum LOW Level 4.5 1.5 0.8 0.8 0.8

OUT

= 0.1V

Input Voltage 5.5 1.5 0.8 0.8 0.8 or V

− 0.1V

Minimum HIGH Level 4.5 4.49 4.4 4.4 4.4

OUT

= −50 µA

Output Voltage 5.5 5.49 5.4 5.4 5.4

IOH = 12

4.5 3.86 3.70 3.76 V IOH = 24 mA

5.5 4.86 4.70 4.76 I

= 24 mA (Note 5)

Maximum LOW Level 4.5 0.001 0.1 0.1 0.1

OUT

= 50 µA

Output Voltage 5.5 0.001 0.1 0.1 0.1

IOL = 12 mA

4.5 0.36 0.50 0.44 V I

= 24 mA

5.5 0.36 0.50 0.44 IOL = 24 mA (Note 5)

Maximum Input

5.5 ±0.1 ±1.0 ±1.0 µAVI = VCC, GND

Leakage Current

Maximum 3-STATE

5.5 ±0.25 ±5.0 ±2.5 µA

VI = VIL, V

Current VO = VCC, GND

CCT

Maximum

5.5 0.6 1.6 1.5 mA VI = VCC − 2.1V

ICC/Input

OLD

Minimum Dynamic 5.5 50 75 mA V

OLD

= 1.65V Max

OHD

Output Current (Note 6) 5.5 −50 −75 mA V

OHD

= 3.85V Min

Maximum Quiescent

5.5 4.0 80.0 40.0 µA

VIN = V

Supply Current or GND

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74AC244 • 74ACT244

AC Electrical Characteristics for AC

Note 7: Voltage Range 3.3 is 3.3V ± 0.3V

Voltage Range 5.0 is 5.0V ± 0.5V

AC Electrical Characteristics for ACT

Note 8: Voltage Range 5.0 is 5.0V ± 0.5V

Capacitance

Symbol Parameter

TA = +25°CT

= −55°C to +125°C TA = −40°C to +85°C

Units

(V)

= 50 pF CL = 50 pF CL = 50 pF

(Note 7) Min Typ Max Min Max Min Max

PLH

Propagation Delay 3.3 2.0 6.5 9.0 1.0 12.5 1.5 10.0

Data to Output 5.0 1 .5 5.0 7.0 1.0 9.5 1.0 7.5

PHL

Propagation Delay 3.3 2.0 6.5 9.0 1.0 12.0 2.0 10.0

Data to Output 5.0 1 .5 5.0 7.0 1.0 9.0 1.0 7.5

PZH

Output Enable Time 3.3 2.0 6.0 10.5 1.0 11.5 1.5 11.0

5.0 1.5 5.0 7.0 1.0 9.0 1.5 8.0

PZL

Output Enable Time 3.3 2.5 7.5 10.0 1.0 13.0 2.0 11.0

5.0 1.5 5.5 8.0 1.0 10.5 1.5 8.5

PHZ

Output Disable Time 3.3 3.0 7.0 10.0 1.0 12.5 1.5 10.5

5.0 2.5 6.5 9.0 1.0 10.5 1.0 9.5

PLZ

Output Disable Time 3.3 2.5 7.5 10.5 1.0 13.0 2.5 11.5

5.0 2.0 6.5 9.0 1.0 11.0 2.0 9.5

Symbol Parameter

TA = +25°CT

= −55°C to +125°C TA = −40°C to +85°C

Units

(V)

CL = 50 pF CL = 50 pF CL = 50 pF

(Note 8) Min Typ Max Min Ma x Min Max

PLH

Propagation Delay

5.0 2.0 6.5 9.0 1.0 10.0 1.5 10.0 ns

Data to Output

PHL

Propagation Delay

5.0 2.0 7.0 9.0 1.0 10.0 1.5 10.0 ns

Data to Output

PZH

Output Enable Time 5.0 1.5 6.0 8.5 1.0 9.5 1.0 9.5 ns

PZL

Output Enable Time 5.0 2.0 7.0 9.5 1.0 11.0 1.5 10.5 ns

PHZ

Output Disable Time 5.0 2.0 7.0 9.5 1.0 11.0 1.5 10.5 ns

PLZ

Output Disable Time 5.0 2.5 7.5 10.0 1.0 11.5 2.0 10.5 ns

Symbol Parameter Typ Units Conditions

Input Capacitance 4.5 pF VCC = OPEN

Power Dissipation Capacitance 45.0 pF VCC = 5.0V

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74AC244 • 74ACT244

Physical Dimensions inches (millimeters) unless otherwise noted

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

Package Number M20B

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74AC244 • 74ACT244

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

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

Package Number M20D

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74AC244 • 74ACT244

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

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

Package Num b er MSA20

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74AC244 • 74ACT244

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

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

Package Number MTC20

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74AC244 • 74ACT244 Octal Buffer/Line Driver with 3-STATE Outputs

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.3 00” Wide

Package Number N20A

Fairchild does not assume any responsibility for use of any circuitry described , no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are dev ic es or syste ms which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provide d in the labe l ing, can be re asonably expected to result in a significant injury to the user.

2. A critical compo nent in any com ponen t of a life s upp ort device or system whose failure to perform can be reasonably expected to cause the failure of the l ife support device or system, or to affect its safety or effectiveness.

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