Texas Instruments CD74ACT273SM96, CD74ACT273SM, CD74ACT273M96, CD74ACT273M, CD74ACT273E Datasheet

Data sheet acquired from Harris Semiconductor SCHS249A

August 1998 - Revised April 2000

CD54AC273, CD74AC273 CD54ACT273, CD74ACT273

Octal D Flip-Flop with Reset

Features

•Buffered Inputs

•Typical Propagation Delay

-6.5ns at VCC = 5V, TA = 25oC, CL = 50pF

•Exceeds 2kV ESD Protection MIL-STD-883, Method 3015

•SCR-Latchup-Resistant CMOS Process and Circuit Design

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

•Balanced Propagation Delays

•AC Types Feature 1.5V to 5.5V Operation and Balanced Noise Immunity at 30% of the Supply

•±24mA Output Drive Current

-Fanout to 15 FAST™ ICs

-Drives 50Ω Transmission Lines

Pinout

CD54AC273, CD54ACT273 (CDIP)

CD74AC273, CD74ACT273

(PDIP, SOIC)

TOP VIEW

Description

The ’AC273 and ’ACT273 devices are octal D-type flip-flops with reset that utilize advanced CMOS logic technology. Information at the D input is transferred to the Q output on the positive-going edge of the clock pulse. All eight flip-flops are controlled by a common clock (CP) and a common reset (MR). Resetting is accomplished by a low voltage level independent of the clock.

Ordering Information

PART	TEMPERATURE
NUMBER	RANGE	PACKAGE
CD74AC273E	-40oC to 85oC	20 Ld PDIP
CD54AC273F3A	-55oC to 125oC	20 Ld CDIP
CD74ACT273E	-40oC to 85oC	20 Ld PDIP
CD54ACT273F3A	-55oC to 125oC	20 Ld CDIP
CD74AC273M	-40oC to 85oC	20 Ld SOIC
CD74ACT273M	-40oC to 85oC	20 Ld SOIC
NOTES:

1.When ordering, use the entire part number. Add the suffix 96 to obtain the variant in the tape and reel.

2.Wafer and die for this part number is available which meets all electrical specifications. Please contact your local sales office for ordering information.

MR	1	20	VCC
Q0	2	19	Q7

D0

3

18

D7

D1

4

17

D6

Q1

5

16

Q6

Q2

6

15

Q5

D2

7

14

D5

D3

8

13

D4

Q3

9

12

Q4

GND

10

11 CP

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

	FAST™ is a Trademark of Fairchild Semiconductor.	1
	Copyright © 2000, Texas Instruments Incorporated

CD54AC273, CD74AC273, CD54ACT273, CD74ACT273

Functional Diagram

CLOCK
	CP
	D0	Q0
	D1	Q1
	D2	Q2
DATA	D3	Q3	DATA
INPUTS	D4	Q4	OUTPUTS
	D5	Q5
	D6	Q6
	D7	Q7

RESET MR

TRUTH TABLE

			INPUTS		OUTPUTS
RESET			CLOCK	DATA
	(MR)		CP	Dn	Qn
	L		X	X	L
	H		↑	H	H
	H		↑	L	L
	H		L	X	Q0

H = High level (steady state), L = Low level (steady state), X = Irrelevant, ↑ = Transition from Low to High level, Q0 = The level of Q before the indicated steady-state input conditions were established.

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CD54AC273, CD74AC273, CD54ACT273, CD74ACT273

Absolute Maximum Ratings

DC Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . .	-0.5V to 6V
DC Input Diode Current, IIK	±20mA
For VI < -0.5V or VI > VCC + 0.5V . . . . . . . . . . . . . . . . . .
DC Output Diode Current, IOK	±50mA
For VO < -0.5V or VO > VCC + 0.5V . . . . . . . . . . . . . . . .
DC Output Source or Sink Current per Output Pin, IO	±50mA
For VO > -0.5V or VO < VCC + 0.5V . . . . . . . . . . . . . . . .
DC VCC or Ground Current, ICC or IGND (Note 3) . . . . . .	. . .±100mA

Thermal Information

Thermal Resistance, θJA (Typical, Note 5)

E Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69oC/W M Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58oC/W

Maximum Junction Temperature (Plastic Package) . . . . . . . . . . 150oC Maximum Storage Temperature Range . . . . . . . . . .-65oC to 150oC Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300oC

Operating Conditions

Temperature Range, TA

CD54AC273, CD54ACT273 . . . . . . . . . . . . . . . . . -55oC to 125oC

CD74AC273, CD74ACT273 . . . . . . . . . . . . . . . . . . -40oC to 85oC

Supply Voltage Range, VCC (Note 4)

AC Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5V to 5.5V

ACT Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.5V to 5.5V

DC Input or Output Voltage, VI, VO . . . . . . . . . . . . . . . . . 0V to VCC

Input Rise and Fall Slew Rate, dt/dv

AC Types, 1.5V to 3V . . . . . . . . . . . . . . . . . . . . . . . . . 50ns (Max)

AC Types, 3.6V to 5.5V . . . . . . . . . . . . . . . . . . . . . . . . 20ns (Max)

ACT Types, 4.5V to 5.5V. . . . . . . . . . . . . . . . . . . . . . . 10ns (Max)

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

NOTES:

3.For up to 4 outputs per device, add ±25mA for each additional output.

4.Unless otherwise specified, all voltages are referenced to ground.

5.The package thermal impedance is calculated in accordance with JESD 51.

DC Electrical Specifications

		TEST					-40oC TO		-55oC TO
		CONDITIONS		VCC	25oC		85oC		125oC
PARAMETER	SYMBOL	VI (V)	IO (mA)	(V)	MIN	MAX	MIN	MAX	MIN	MAX	UNITS
AC TYPES
High Level Input Voltage	VIH	-	-	1.5	1.2	-	1.2	-	1.2	-	V
				3	2.1	-	2.1	-	2.1	-	V
				5.5	3.85	-	3.85	-	3.85	-	V
Low Level Input Voltage	VIL	-	-	1.5	-	0.3	-	0.3	-	0.3	V
				3	-	0.9	-	0.9	-	0.9	V
				5.5	-	1.65	-	1.65	-	1.65	V
High Level Output Voltage	VOH	VIH or VIL	-0.05	1.5	1.4	-	1.4	-	1.4	-	V
			-0.05	3	2.9	-	2.9	-	2.9	-	V
			-0.05	4.5	4.4	-	4.4	-	4.4	-	V
			-4	3	2.58	-	2.48	-	2.4	-	V
			-24	4.5	3.94	-	3.8	-	3.7	-	V
			-75	5.5	-	-	3.85	-	-	-	V
			(Note 6, 7)
			-50	5.5	-	-	-	-	3.85	-	V
			(Note 6, 7)

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