Texas Instruments CD74AC280, CD74ACT280 9-Bit Odd Even Parity Generator Checker Data Sheet User Manual

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CD74AC280, CD74ACT280

Data sheet acquired from Harris Semiconductor SCHS250

August 1998 9-Bit Odd/Even Parity Generator/Checker

Features Description Buffered Inputs The CD74AC280 and CD74ACT280 9-bit odd/even parity

generator/checkers that utilize the Harris Advanced CMOS

Typical Propagation Delay

Logic technology. Bothe even and odd parity outputs are

10ns at VCC = 5V, TA = 25o C, CL = 50p F

available for checking or generating parity for words up to nine bits long. Even parity is indicated (∑Eoutput is HIGH)

Exceeds 2k V ESD Protection MIL-STD-883, Method

when an even number of data inputs is HIGH. Odd parity is indicated (∑O output is HIGH) when an odd number of data

SCR-Latchup-Resistant CMOS Process and Circuit inputs is HIGH. Parity checking for words larger than nine Design bits can be accomplished by tying the ∑E output to any input

of an additional AC/ACT280 parity checker.

Speed of Bipolar FAST™/AS/S with Significantly Reduced Power Consumption

Balanced Propagation Delays Ordering Information

AC Types Feature 1.5V to 5.5V Operation and PART TEMP. PKG.

Balanced Noise Immunity at 30% of the Supply NUMBER RANGE (o C) PACKAGE NO. CD74AC280E 0 to 70o C, -40 to 85, 14 Ld PDIP E14.3

±24m A Output Drive Current

-55 to 125

Fanout to 15 FAST™ ICs

CD74ACT280E 0 to 70o C, -40 to 85, 14 Ld PDIP E14.3

Drives 50Ω Transmission Lines

-55 to 125

CD74AC280M 0 to 70o C, -40 to 85, 14 Ld SOIC M14.15

-55 to 125

Pinout

CD74ACT280M 0 to 70o C, -40 to 85, 14 Ld SOIC M14.15

CD74AC280, CD74ACT280

-55 to 125

(PDIP, SOIC)

NOTES:

TOP VIEW

1. When ordering, use the entire part number. Add the suffix to obtain the variant in the tape and reel. 2. Wafer and die for this part number is available which meets all elec-

I6 VCC

trical specifications. Please contact your local sales office or Harris

I7 I5 customer service for ordering information.

NC I4

Functional Diagram

GND I0

∑ EVEN

∑ ODD

GND = 7 VCC = 14

NC = 3

CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.

File Number 1957.1

FAST™ is a Trademark of Fairchild Semiconductor. Copyright © Harris Corporation 1998