SN54ABT2244 Datasheet, PDF (1/7 Pages) Texas Instruments – OCTAL BUFFERS AND LINE/MOS DRIVERS WITH 3-STATE OUTPUTS

SN54ABT2244, SN74ABT2244
OCTAL BUFFERS AND LINE/MOS DRIVERS
WITH 3-STATE OUTPUTS
SCBS106B – JANUARY 1991 – REVISED JULY 1994
• Output Ports Have Equivalent 25-Ω Series
Resistors, So No External Resistors Are
Required
• State-of-the-Art EPIC-ΙΙB™ BiCMOS Design
Significantly Reduces Power Dissipation
• Typical V_OLP (Output Ground Bounce)
< 1 V at V_CC = 5 V, T_A = 25°C
• Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK), and
Plastic (N) and Ceramic (J) DIPs
description
SN54ABT2244 . . . J PACKAGE
SN74ABT2244 . . . DB, DW, N, OR PW PACKAGE
(TOP VIEW)
1OE ₁
1A1 ₂
2Y4 ₃
1A2 ₄
2Y3 ₅
1A3 ₆
2Y2 ₇
1A4 ₈
2Y1 ₉
GND ₁₀
20 ^V_CC
19 ^2OE
18 ^1Y1
17 ^2A4
16 ^1Y2
15 ^2A3
14 ^1Y3
13 ^2A2
12 ^1Y4
11 ^2A1
These octal buffers and line drivers are designed
specifically to improve both the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters. Taken together with the ′ABT2240
and ′ABT2241, these devices provide the choice
of selected combinations of inverting and
noninverting outputs, symmetrical active-low
output-enable (OE) inputs, and complementary
OE and OE inputs. These devices feature high
fan-out and improved fan-in.
SN54ABT2244 . . . FK PACKAGE
(TOP VIEW)
3 2 1 20 19
1A2 4
18 1Y1
2Y3 ⁵
17 2A4
1A3 ⁶
16 _1Y2
2Y2 ⁷
15 _2A3
1A4
8
14
9 10 11 12 13
1Y3
The outputs, which are designed to sink up to
12 mA, include 25-Ω series resistors to reduce
overshoot and undershoot.
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 SN74ABT2244 is available 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 SN54ABT2244 is characterized for operation over the full military temperature range of – 55°C to 125°C.
The SN74ABT2244 is characterized for operation from – 40°C to 85°C.
FUNCTION TABLE
(each buffer)
INPUTS
OE
A
OUTPUT
Y
L
H
H
L
L
L
H
X
Z
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1994, Texas Instruments Incorporated
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