SN74LVC543 Datasheet, PDF (1/6 Pages) Texas Instruments – OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS

D EPIC ™ (Enhanced-Performance Implanted
CMOS) Submicron Process
D Typical V_OLP (Output Ground Bounce)
< 0.8 V at V_CC = 3.3 V, T_A = 25°C
D Typical V_OHV (Output V_OH Undershoot)
> 2 V at V_CC = 3.3 V, T_A = 25°C
D Latch-Up Performance Exceeds 250 mA
Per JEDEC Standard JESD-17
D Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
SN74LVC543
OCTAL REGISTERED TRANSCEIVER
WITH 3-STATE OUTPUTS
SCAS299A – JANUARY 1993 – REVISED JULY 1995
DB, DW, OR PW PACKAGE
(TOP VIEW)
LEBA 1
OEBA 2
A1 3
A2 4
A3 5
A4 6
A5 7
A6 8
A7 9
A8 10
CEAB 11
GND 12
24 V_CC
23 CEBA
22 B1
21 B2
20 B3
19 B4
18 B5
17 B6
16 B7
15 B8
14 LEAB
13 OEAB
This octal registered transceiver is designed for
2.7-V to 3.6-V V_CC operation.
The SN74LVC543 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 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 places 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 for B to A is similar to that of A to B but uses CEBA, LEBA,
and OEBA.
To ensure the high-impedance state during power up or power down, OE should be tied to V_CC through a pullup
resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
The SN74LVC543 is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE†
INPUTS
OUTPUT
CEAB LEAB OEAB A
B
H
X
X
X
Z
X
X
H
X
Z
L
H
L
X
B0‡
L
L
L
L
L
L
L
L
H
H
† _{A-to-B data flow is shown; B-to-A flow control is the}
same except that it uses CEBA, LEBA, and OEBA.
‡ _{Output level before the indicated steady-state input}
conditions were established
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 © 1995, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
1