Fairchild Semiconductor 74ABT2240CMSA, 74ABT2240CSJX, 74ABT2240CSJ, 74ABT2240CSCX, 74ABT2240CSC Datasheet

© 1999 Fairchild Semiconductor Corporation DS011665 www.fairchildsemi.com

March 1994
Revised November 1999

74ABT2240 Octal Buffer/Line Driver with 25Ω Series Resistors in the Outputs

74ABT2240
Octal Buffer/Line Driver with

25Ω Series Resistors in the Outputs

General Description

The ABT2240 is an in verting octal buffer and line driver
designed to drive the capacitive inputs of MOS memory
drivers, address drivers, clock drivers, and bus-oriented
transmitters/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 also availab le in Tape and Reel. Specify by appending letter suffix “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 Numb er Package Description

74ABT2240CSC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide Body
74ABT2240CSJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74ABT2240CMSA MSA20 20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74ABT2240CMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Pin Names Descriptions

OE

1

, OE

2

Output Enable Input (Active LOW)

D

0–D7

Data Inputs

O

0–O7

Outputs

OE

1

I

0–3

O

0–3

OE

2

I

4–7

O

4–7

H X Z H X Z
L H L L H L
L L H L L H

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74ABT2240

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.

Note 2: Either voltage lim it or c urrent limit is sufficient to prot ect inputs.

DC Electrical Characteristics

Note 3: Guaranteed, but not tested.
Note 4: For 8 bits toggling, I

CCD

< 0.8 mA/MHz.

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 Inpu t 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 IIN = −18 mA

V

OH

Output HIGH 2.5 V Min IOH = −3 mA
Voltage 2.0 V Min IOH = −32 mA

V

OL

Output LOW Voltage 0.8 V Min IOL = 15 mA

I

IH

Input HIGH Current 1

µAMax

VIN = 2.7V (Note 3)

1V

IN

= V

CC

I

BVI

Input HIGH Current Breakdown Test 7 µAMaxVIN = 7.0V

I

IL

Input LOW Current −1

µAMax

VIN = 0.5V (Note 3)

−1V

IN

= 0.0V

V

ID

Input Leakage Test V 0.0 IID = 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 −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 VCCor GND

I

CCT

Additional Outputs Enabled 1.5 mA VI = V

CC

− 2.1V

ICC/Input Outputs 3-STATE 1.5 mA Max Enable Input VI = VCC − 2.1V

Outputs 3-STATE 50 µA Data Input VI = VCC − 2.1V

All Others at VCCor GND

I

CCD

Dynamic I

CC

No Load mA/

Max

Outputs OPEN

(Note 3) 0.1

MHz

OEn = GND (Note 4)
One Bit Toggling, 50% Duty Cycle

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74ABT2240

AC Electrical Characteristics

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 VCC = 4.5V–5.5V

C

L

= 50 pF CL = 50 pF

Min Typ Max Min Max

t

PLH

Propagation 1.0 4.9 1.0 4.9

ns

t

PHL

Delay Data to Outputs 1.5 5.3 1.5 5.3

t

PZH

Output Enable 1.5 6.6 1.5 6.6

ns

t

PZL

Time 2.7 6.9 2.7 6.9

t

PHZ

Output Disable 1.9 6.4 1.9 6.4

ns

t

PLZ

Time 1.9 6.4 1.9 6.4

Symbol Parameter Typ Units

Conditions

T

A

= 25°C

C

IN

Input Capacitance 5.0 pF VCC = 0V

C

OUT

(Note 5) Output Capacitance 9.0 pF VCC = 5.0V