SN74LVT244DBR Datasheet, PDF (1/13 Pages) Texas Instruments – 3.3-V ABT OCTAL BUFFERS/DRIVERS WITH 3-STATE OUTPUTS

• State-of-the-Art Advanced BiCMOS
Technology (ABT) Design for 3.3-V
Operation and Low Static Power
Dissipation
• Support Mixed-Mode Signal Operation (5-V
Input and Output Voltages With 3.3-V V_CC)
• Support Unregulated Battery Operation
Down to 2.7 V
• Typical V_OLP (Output Ground Bounce)
< 0.8 V at V_CC = 3.3 V, T_A = 25°C
• 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
• Bus-Hold Data Inputs Eliminate the Need
for External Pullup Resistors
• Supports Live Insertion
• Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages, Ceramic Chip Carriers (FK),
Ceramic Flatpacks (W), and Ceramic
DIPS (J)
SN54LVT244, SN74LVT244
3.3-V ABT OCTAL BUFFERS/DRIVERS
WITH 3-STATE OUTPUTS
SCBS135B – AUGUST 1992 – REVISED MARCH 1994
SN54LVT244 . . . J OR W PACKAGE
SN74LVT244 . . . DB, DW, 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
SN54LVT244 . . . FK PACKAGE
(TOP VIEW)
1A2
3 2 1 20 19
4
18
1Y1
2Y3 ₅
17 ^2A4
1A3 6
16 1Y2
2Y2 7
15 2A3
1A4 8
14 1Y3
9 10 11 12 13
description
These octal buffers and line drivers are designed specifically for low-voltage (3.3-V) V_CC operation, but with the
capability to provide a TTL interface to a 5-V system environment.
The ’LVT244 is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low,
the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
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 SN74LVT244 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 SN54LVT244 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
SN74LVT244 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
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
LVT244–5
2–1