OCTAL BUFFERS/DRIVERS. SN54F244 Datasheet

SN54F244 BUFFERS/DRIVERS. Datasheet pdf. Equivalent

SN54F244 Datasheet
Recommendation SN54F244 Datasheet
Part SN54F244
Description OCTAL BUFFERS/DRIVERS
Feature SN54F244; • 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers • Package Options Include Plast.
Manufacture etcTI
Datasheet
Download SN54F244 Datasheet




Texas Instruments SN54F244
3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
Package Options Include Plastic
Small-Outline (SOIC) and Shrink
Small-Outline (SSOP) Packages, Ceramic
Chip Carriers, and Plastic and Ceramic
DIPs
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
transmitters. Taken together with the F240 and
F241, these devices provide the choice of
selected combinations of inverting and
noninverting outputs, symmetrical OE (active-low
output-enable) inputs, and complementary OE
and OE inputs.
The F244 is organized as two 4-bit buffers/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.
The SN74F244 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 SN54F244 is characterized for operation over
the full military temperature range of − 55°C to
125°C. The SN74F244 is characterized for
operation from 0°C to 70°C.
SN54F244, SN74F244
OCTAL BUFFERS/DRIVERS
WITH 3ĆSTATE OUTPUTS
SDFS063A − D2932, MARCH 1987 − REVISED OCTOBER 1993
SN54F244 . . . J PACKAGE
SN74F244 . . . DB, DW, OR N PACKAGE
(TOP VIEW)
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 2OE
18 1Y1
17 2A4
16 1Y2
15 2A3
14 1Y3
13 2A2
12 1Y4
11 2A1
SN54F244 . . . 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
FUNCTION TABLE
(each buffer)
INPUTS
OE A
OUTPUT
Y
LH
H
LL
L
HX
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.
Copyright 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
2−1



Texas Instruments SN54F244
SN54F244, SN74F244
OCTAL BUFFERS/DRIVERS
WITH 3ĆSTATE OUTPUTS
SDFS063A − D2932, MARCH 1987 − REVISED OCTOBER 1993
logic symbol
logic diagram (positive logic)
1
1OE
EN
1OE
1
2
1A1
4
1A2
6
1A3
8
1A4
18
1Y1
16
1Y2
14
1Y3
12
1Y4
19
2OE
EN
11
2A1
13
2A2
15
2A3
17
2A4
9
2Y1
7
2Y2
5
2Y3
3
2Y4
This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
2
1A1
1A2 4
6
1A3
8
1A4
2OE
19
11
2A1
13
2A2
15
2A3
17
2A4
18
1Y1
16
1Y2
14
1Y3
12
1Y4
9
2Y1
7
2Y2
5
2Y3
3
2Y4
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1.2 V to 7 V
Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −30 mA to 5 mA
Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . −0.5 V to 5.5 V
Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC
Current into any output in the low state: SN54F244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74F244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54F244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55°C to 125°C
SN74F244 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −65°C to 150°C
Stresses beyond those listed under “absolute maximum ratings” 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 “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
2−2
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443



Texas Instruments SN54F244
recommended operating conditions
VCC
VIH
VIL
IIK
IOH
IOL
TA
Supply voltage
High-level input voltage
Low-level input voltage
Input clamp current
High-level output current
Low-level output current
Operating free-air temperature
SN54F244, SN74F244
OCTAL BUFFERS/DRIVERS
WITH 3ĆSTATE OUTPUTS
SDFS063A − D2932, MARCH 1987 − REVISED OCTOBER 1993
SN54F244
MIN NOM MAX
4.5 5 5.5
2
0.8
− 18
− 12
48
−55 125
SN74F244
MIN NOM MAX
4.5 5 5.5
2
0.8
− 18
− 15
64
0 70
UNIT
V
V
V
mA
mA
mA
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F244
MIN TYP† MAX
SN74F244
MIN TYP† MAX
VIK
VCC = 4.5 V,
II = − 18 mA
− 1.2
IOH = − 3 mA
2.4 3.3
2.4 3.3
VOH
VCC = 4.5 V
IOH = − 12 mA
IOH = − 15 mA
2 3.2
2 3.1
VCC = 4.75 V,
IOH = − 3 mA
2.7
VOL
VCC = 4.5 V
IOL = 48 mA
IOL = 64 mA
0.38 0.55
0.42
IOZH
VCC = 5.5 V,
VO = 2.7 V
50
IOZL
VCC = 5.5 V,
VO = 0.5 V
− 50
II
VCC = 5.5 V,
VI = 7 V
0.1
IIH
VCC = 5.5 V,
VI = 2.7 V
20
OE
IIL Any A VCC = 5.5 V,
VI = 0.5 V
−1
− 1.6
IOS‡
VCC = 5.5 V,
VO = 0
− 100
−225 −100
Outputs high
ICC
VCC = 5.5 V,
Outputs open
Outputs low
Outputs disabled
40 60
60 90
60 90
40
60
60
† All typical values are at VCC = 5 V, TA = 25°C.
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
− 1.2
0.55
50
− 50
0.1
20
−1
− 1.6
− 225
60
90
90
UNIT
V
V
V
µA
µA
mA
µA
mA
mA
mA
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
2−3







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)