Texas Instruments 74ACT11240NT, 74ACT11240DWR, 74ACT11240DW, 74ACT11240DBR, 74ACT11240DBLE Datasheet

								74ACT11240
	OCTAL BUFFER/LINE DRIVER
			WITH 3-STATE OUTPUTS
	SCAS210A ± MAY 1987 ± REVISED APRIL 1996
D Inputs Are TTL-Voltage Compatible	DB, DW, OR NT PACKAGE
D Flow-Through Architecture Optimizes		(TOP VIEW)
PCB Layout
D Center-Pin VCC and GND Configurations	1Y1		1	24		1OE
	1Y2		2	23		1A1
Minimize High-Speed Switching Noise	1Y3					1A2
		3		22
D EPICt (Enhanced-Performance Implanted
	1Y4		4	21		1A3
CMOS) 1-mm Process	GND		5	20		1A4
D 500-mA Typical Latch-Up Immunity at	GND		6	19		VCC
125 C	GND					VCC
°	GND		7	18		2A1
D Package Options Include Plastic			8	17
Small-Outline (DW) and Shrink	2Y1		9	16		2A2
Small-Outline (DB) Packages, and Standard	2Y2		10	15		2A3
Plastic 300-mil DIPs (NT)	2Y3		11	14		2A4
	2Y4		12	13
						2OE

description

This octal buffer or line driver is designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. This device provides inverting outputs and symmetrical active-low output-enable (OE) inputs. This device features high fan-out and improved fan-in.

The 74ACT11240 is characterized for operation from ±40°C to 85°C.

FUNCTION TABLE (each buffer)

	INPUTS			OUTPUT
				Y
	OE		A
	L		H	L
	L		L	H
	H		X	Z

logic symbol²

			24									13
1OE				EN						2OE				EN
			23					1		17							9
1A1						1			1Y1	2A1				1				2Y1
			22					2		16							10
1A2									1Y2	2A2								2Y2
			21					3		15							11
1A3									1Y3	2A3								2Y3
			20					4		14							12
1A4									1Y4	2A4								2Y4

² This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

EPIC is a trademark of Texas Instruments Incorporated.

PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.

Copyright 1996, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

1

74ACT11240

OCTAL BUFFER/LINE DRIVER WITH 3-STATE OUTPUTS

SCAS210A ± MAY 1987 ± REVISED APRIL 1996

logic diagram (positive logic)

1OE	24			2OE	13
1A1	23	1	1Y1	2A1	17	9	2Y1
1A2	22	2	1Y2	2A2	16	10	2Y2
1A3	21	3	1Y3	2A3	15	11	2Y3
1A4	20	4	1Y4	2A4	14	12	2Y4

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)²

Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . ±0.5 V to 6	V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±0.5 V to VCC + 0.5	V
Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±0.5 V to VCC + 0.5	V
Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . ±50 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . . ±50 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . ±200 mA
Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DB package . . . . . .	. . . . . . . . . . . 0.65 W
DW package . . . . .	. . . . . . . . . . . . 1.7 W
NT package . . . . . .	. . . . . . . . . . . . 1.3 W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . ±65°C to 150°C

² Stresses beyond those listed under ªabsolute maximum ratingsº may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ªrecommended operating conditionsº is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2.The maximum package power dissipation is calculated using a junction temperature of 150_C and a board trace length of 750 mils, except for the NT package, which has a trace length of zero.

recommended operating conditions

		MIN	NOM	MAX	UNIT
VCC	Supply voltage	4.5	5	5.5	V
VIH	High-level input voltage	2			V
VIL	Low-level input voltage			0.8	V
VI	Input voltage	0		VCC	V
VO	Output voltage	0		VCC	V
IOH	High-level output current			±24	mA
IOL	Low-level output current			24	mA
Dt/Dv	Input transition rise or fall rate	0		10	ns/V
TA	Operating free-air temperature	±40		85	°C

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265