SN54ALS244B Datasheet, PDF (1/6 Pages) Texas Instruments – OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS

SN54ALS244B, SN54AS244, SN74ALS244B, SN74AS244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDAS142 – D2661, DECEMBER 1982 – REVISED JULY 1987
• 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
• PNP inputs Reduce DC Loading
• Package Options include Plastic Small
Outline Packages, Ceramic Chip Carriers,
and Standard Plastic and Ceramic 300-mil
DIPs
• Dependable Texas instruments Quality and
Reliability
description
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 transmit-
ters. Taken together with the ’ALS240A,
’ALS241A, ’AS240, and ’AS241, these devices
provide the choice of selected combinations of
inverting outputs, symmetrical G (active-low input
control) inputs, and complementary G and G
inputs.
The –1 version of the SN74ALS244B is identical
to the standard version except that the
recommended maximum I_OL is increased to
48 mA. There is no –1 version of the
SN54ALS244B.
SN54ALS244B, SN54AS244 . . . J PACKAGE
SN74ALS244B, SN74AS244 . . . DW OR N PACKAGE
(TOP VIEW)
1G ₁
1A1 ₂
2Y4 ₃
1A2 ₄
2Y3 ₅
1A3 6
2Y2 7
1A4 8
2Y1 9
GND 10
20 ^V_CC
19 ^2G
18 ^1Y1
17 ^A24
16 ^1Y2
15 ^2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
SN54ALS244B, SN54AS244 . . . 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
The SN54ALS244B and SN54AS244 are characterized for operation over the full military temperature range
of – 55°C to 125°C. The SN74ALS244B and SN74AS244 are characterized for operation from 0°C to 70°C.
logic symbol^†
1
1G
EN
2
1A1
4
1A2
6
1A3
8
1A4
19
2G
EN
11
2A1
13
2A2
15
2A3
17
2A4
18
1Y1
16
1Y2
14
1Y3
12
1Y4
9
2Y1
7
2Y2
5
2Y3
3
2Y4
† This is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
Pin numbers are for DW, J, and N packages.
1G ¹
1A1 ²
1A2 ⁴
1A3 ⁶
1A4 ⁸
2G ¹⁹
2A1 ¹¹
2A2 ¹³
2A3 ¹⁵
2A4 ¹⁷
18
1Y1
16
1Y2
14
1Y3
12
1Y4
9
1Y1
7
1Y2
5
1Y3
3
1Y4
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 © 1987, Texas Instruments Incorporated
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