Fairchild Semiconductor 74F2240SCX, 74F2240SC, 74F2240QCX, 74F2240QC Datasheet

January 1995
Revised May 1999

74F2240 Octal Buffer/Line Driver

© 1999 Fairchild Semiconductor Corporation DS010898.prf www.fairchildsemi.com

74F2240
Octal Buffer/Line Driver

with 25Ω Series Resistors in the Outputs

General Description

The 74F2240 is an inverting octal buffer and line driver
designed to drive capacitive inputs of MOS memory
devices, address and clock line s or act as a low under­shoot general purpose bus driver.

The 25Ω series resistor in t he out puts red uces un dersho ot
and ringing and eliminates the need for external resistors.

Features

■ 3-STATE outputs drive bus lines or buffer memory
address registers

■ Outputs sink 12 mA and source 15 mA

■ 25Ω series resistors in outputs eliminate the need for

external resistors

■ Designed to drive the capacitive inputs of MOS devices

■ Guarante ed 4000V minimum ESD protection

Ordering Code:

Devices also availab le in Tape and Reel. Specify by appending th e s uffix let t er “X” to the ordering cod e.

Connection Diagram Truth Table

Unit Loading/Fan Out

Order Number Package Number Package Description

74F2240SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F2240QC V20A 20-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.350 Square

OE

1

D

1n

O

1n

OE

2

D

2n

O

2n

HXZHXZ
LHLLHL
LLHLLH

Pin

Description

U.L. Output

Names HIGH/LOW

I

OH/IOL

OE1, OE23-STATE Output

1.0/1.667 20 µA/−1 mAEnable Input

(Active LOW)

I

0

- I

7

Inputs 1.0/1.667 20 µA/−1 mA

O

0

- O7Outputs 750/20 −15 mA/12 mA

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74F2240

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 limit or curren t limit is sufficient to protect in put s .

DC Electrical Characteristics

Storage Temperature −65°C to + 150°C
Ambient Temperature under Bias −55° 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 Output

In HIGH State (with V

CC

= 0V)

Standard Output −0.5V to V

CC

3-STATE Output −0.5V to +5.5V

Current Applied to Output

in LOW State (Max) twice the rated I

OL

(mA)

ESD Last Passing Voltage (Min) 4000V

Free Air Ambient Temperature 0°C to 70°C
Supply Voltage +4.5V to +5.5V

Symbol Parameter Min Typ Max Units

V

CC

Conditions

V

IH

Input HIGH Voltage 2.0 V Recognized as a HIGH Signal

V

IL

Input LOW Voltage 0.8 V Recognized as a LOW Signal

V

CD

Input Clamp Diode Voltage −1.2 V Min IIN = −18 mA

V

OH

Output HIGH 10% V

CC

2.4
VMin

IOH = −3 mA

Voltage 10% V

CC

2.0 IOH = −15 mA

V

OL

Output LOW Voltage 10% V

CC

0.75 V Min IOL = 12 mA

I

IH

Input HIGH Current 5.0 µAMaxVIN = 2.7V

I

BVI

Input HIGH Current Breakdown Test 7.0 µAMaxVIN = 7.0V

I

CEX

Output HIGH Leakage Current 50 µAMaxV

OUT

= V

CC

V

ID

Input Leakage

4.75 V 0.0

IID = 1.9 µA

Test All Other Pins Grounded

I

OD

Output Leakage

3.75 µA0.0

V

IOD

= 150 mV

Circuit Current All Other Pins Grounded

I

IL

Input LOW

−1.0 mA Max

VIN = 0.5V

Current

(OE1, OE2, Dn)

I

OZH

Output Leakage Current 50 µAMaxV

OUT

= 2.7V

I

OZL

Output Leakage Current −50 µAMaxV

OUT

= 0.5V

I

OS

Output Short-Circuit Current −100 −225 mA Max V

OUT

= 0V

I

ZZ

Bus Drainage Test 500 µA0.0V

OUT

= 5.25V

I

CCH

Power Supply Current 16 29 mA Max VO = HIGH

I

CCL

Power Supply Current 47 75 mA Max VO = LOW

I

CCZ

Power Supply Current 45 63 mA Max VO = HIGH Z