Texas Instruments SN74ABT543ADBLE, SN74ABT543ADBR, SN74ABT543ADW, SN74ABT543ADWR, SN74ABT543ANT Datasheet

SN74ABT543A OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS

SCBS464A ± JUNE 1992 ± REVISED JUNE 1994

•State-of-the-Art EPIC-ΙΙB BiCMOS Design

Significantly Reduces Power Dissipation

•ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)

•Latch-Up Performance Exceeds 500 mA Per JEDEC Standard JESD-17

•Typical VOLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C

•High-Drive Outputs (±32-mA IOH, 64-mA IOL)

•Package Options Include Plastic Small-Outline (DW) and Shrink Small-Outline (DB) Packages, and Standard Plastic 300-mil DIPs (JT)

description

DB, DW, OR NT PACKAGE

(TOP VIEW)

	LEBA			1	24			VCC
OEBA				2	23			CEBA
	A1			3	22			B1
	A2			4	21			B2
	A3			5	20			B3
	A4			6	19			B4
	A5			7	18			B5
	A6			8	17			B6
	A7			9	16			B7
	A8			10	15			B8
CEAB				11	14			LEAB
	GND
				12	13			OEAB

The SN74ABT543A octal transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate latch-enable (LEAB or LEBA) and output-enable (OEAB or OEBA) inputs are provided for each register to permit independent control in either direction of data flow.

The A-to-B enable (CEAB) input must be low in order to enter data from A or to output data from B. If CEAB is low and LEAB is low, the A-to-B latches are transparent; a subsequent low-to-high transition of LEAB puts the A latches in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the data present at the output of the A latches. Data flow from B to A is similar but requires using the CEBA, LEBA, and OEBA inputs.

To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.

The SN74ABT543A is packaged in TI's shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area.

The SN74ABT543A is characterized for operation from ±40°C to 85°C.

FUNCTION TABLE²

			INPUTS				OUTPUT
						A	B
	CEAB		LEAB		OEAB
	H		X		X	X	Z
	X		X		H	X	Z
	L		H		L	X	B ³
							0
	L		L		L	L	L
	L		L		L	H	H

² A-to-B data flow is shown; B-to-A flow control is the same except that it uses CEBA, LEBA, and OEBA.

³Output level before the indicated steady-state input conditions were established.

EPIC-ΙΙB 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 1994, Texas Instruments Incorporated

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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SN74ABT543A

OCTAL REGISTERED TRANSCEIVER

WITH 3-STATE OUTPUTS

SCBS464A ± JUNE 1992 ± REVISED JUNE 1994

logic symbol²

2	1EN3
OEBA
23	G1
CEBA
1	1C5
LEBA
13	2EN4
OEAB
11	G2
CEAB
14	2C6
LEAB
3	3	1	5D	22
A1				B1
4	6D	1	4	21
A2				B2
5				20
A3				B3
6				19
A4				B4
7				18
A5				B5
8				17
A6				B6
9				16
A7				B7
10				15
A8				B8

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

logic diagram (positive logic)

OEBA	2
CEBA	23
LEBA	1
OEAB	13
CEAB	11
LEAB	14
A1	3	C1
			22
		1D
			B1
		C1
		1D
		To Seven Other Channels

2	POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

SN74ABT543A

OCTAL REGISTERED TRANSCEIVER

WITH 3-STATE OUTPUTS

SCBS464A ± JUNE 1992 ± REVISED JUNE 1994

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

Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . ±0.5 V to 7	V
Input voltage range, VI (except I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. ±0.5 V to 7	V
Voltage range applied to any output in the high state or power-off state, VO . . . . . . . . . . . . .	±0.5 V to 5.5	V
Current into any output in the low state, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . 128 mA
Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . ±18 mA
Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . ±50 mA
Maximum power dissipation at TA = 55°C (in still air): DB package . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 0.7 W
DW package . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . . . 1 W
NT package . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 1.3 W
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	±65°C to 150°C

²Stresses 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.

NOTE 1: The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

recommended operating conditions (see Note 2)

			MIN	MAX	UNIT
VCC	Supply voltage		4.5	5.5	V
VIH	High-level input voltage		2		V
VIL	Low-level input voltage			0.8	V
VI	Input voltage		0	VCC	V
IOH	High-level output current			±32	mA
IOL	Low-level output current			64	mA
t/ v	Input transition rise or fall rate	Outputs enabled		5	ns/V
TA	Operating free-air temperature		±40	85	°C

NOTE 2: Unused or floating pins (input or I/O) must be held high or low.

POST OFFICE BOX 655303 •DALLAS, TEXAS 75265

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