Texas Instruments SN74ALS244CN Handleiding


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SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
Copyright 1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
3-State Outputs Drive Bus Lines or Buer
Memory Address Registers
pnp Inputs Reduce dc Loading
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic (N)
and Ceramic (J) 300-mil DIPs
description
These octal buers and line drivers are designed
specically to improve the performance and
density of 3-state memory address drivers, clock
drivers, and bus-oriented receivers and
transmitters. With the ALS240A, ALS241C,′ ′
AS240A, and AS241A, these devices provide the
choice of selected combinations of inverting
outputs, symmetrical active-low output-enable
(OE) inputs, and complementary OE and OE
inputs.
The -1 version of SN74ALS244C is identical to the
standard version, except that the recommended
maximum IOL for the -1 version is 48 mA. There is
no -1 version of the SN54ALS244C.
The SN54ALS244C and SN54AS244A are
characterized for operation over the full military
temperature range of 55 C to 125° °C. The
SN74ALS244C and SN74AS244A are
characterized for operation from 0°C to 70 C.°
FUNCTION TABLE
(each buer)
INPUTS OUTPUT
OE A Y
L H H
L L L
H X Z
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
SN54ALS244C, SN54AS244A . . . J PACKAGE
SN74ALS244C, SN74AS244A . . . DW OR N PACKAGE
(TOP VIEW)
3 2 1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
1Y1
2A4
1Y2
2A3
1Y3
1A2
2Y3
1A3
2Y2
1A4
SN54ALS244C, SN54AS244A . . . FK PACKAGE
(TOP VIEW)
2Y4
1A1
1OE
1Y4
2A2 2OE
2Y1
GND
2A1 V
CC
PRODUCTION DATA information is current as of publication date.
Products conform to specications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
2POST OFFICE BOX 655303 DALLAS, TEXAS 75265
logic symbollogic diagram (positive logic)
1
2
4
6
8
19
11
13
15
17 3
5
7
9
12
14
16
18
1A1
1A2
1A3
1A4
1Y1
2A1
2A2
2A3
2A4
2Y1
1Y2
1Y3
1Y4
2Y2
2Y3
2Y4
2OE
1OE
2
1A1 4
1A2 6
1A3
8
1A4
EN
1
1Y1
18
1Y2
16
1Y3
14
1Y4
12
11
2A1 13
2A2 15
2A3
17
2A4
EN
19
2Y1
9
2Y2
7
2Y3
5
2Y4
3
1OE
2OE
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, VI 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage applied to a disabled 3-state output 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: SN54ALS244C 55°C to 125 C°. . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS244C 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.
SN54ALS244C, SN54AS244A, SN74ALS244C, SN74AS244A
OCTAL BUFFERS AND LINE DRIVERS
WITH 3-STATE OUTPUTS
SDAS142C – JULY 1987 – REVISED AUGUST 1995
3
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
recommended operating conditions
SN54ALS244C SN74ALS244C
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL
Low level in
p
ut voltage
0.80.8
V
V
IL
Lo
w-
le
v
el
inp
u
t
v
oltage
0.7
V
IOH High-level output current 12 15 mA
IOL
Low level out
p
ut current
12 24
mA
I
OL
Lo
w-
le
v
el
o
u
tp
u
t
c
u
rrent
48§
mA
TAOperating free-air temperature 55 125 0 70 C°
Applies over temperature range – 55°C to 70 C°
Applies over temperature range 70°C to 125 C°
§Applies only to the -1 version and only if V
CC is between 4.75 V and 5.25 V
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS244C SN74ALS244C
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYPMAX MIN TYPMAX
UNIT
VIK VCC = 4.5 V, II = –18 mA 1.5 1.5 V
VCC 4 5 V to 5 5 V
IOH = – 0.4 mA VCC 2 VCC 2
VOH
V
CC =
4
.
5
V
to
5
.
5
V
IOH = – 3 mA 2.4 3.2 2.4 3.2
V
V
OH
VCC 4 5 V
IOH = – 12 mA 2
V
V
CC =
4
.
5
V
IOH = – 15 mA 2
IOL = 12 mA 0.25 0.4 0.25 0.4
VOL VCC = 4.5 V IOL = 24 mA 0.35 0.5 V
IOL = 48 mA (-1 version) 0.35 0.5
IOZH VCC = 5.5 V, V
O = 2.7 V 20 20 Aµ
IOZL VCC = 5.5 V, V
O = 0.4 V 20 20 µA
IIVCC = 5.5 V, V
I = 7 V 0.1 0.1 mA
IIH VCC = 5.5 V, V
I = 2.7 V 20 20 Aµ
IIL VCC = 5.5 V, V
I = 0.4 V 0.1 0.1 mA
IO#VCC = 5.5 V, V
O = 2.25 V 20 112 30 112 mA
Outputs high 9 18 9 17
ICC VCC = 5.5 V Outputs low 15 25 15 24 mA
Outputs disabled 17 29 17 27
All typical values are at V
CC = 5 V, TA = 25 C.°
#The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS.


Product specificaties

Merk: Texas Instruments
Categorie: Niet gecategoriseerd
Model: SN74ALS244CN
Breedte: 26.92 mm
Diepte: 6.6 mm
Hoogte: 4.57 mm
Breedte verpakking: 13.97 mm
Diepte verpakking: 506 mm
Hoogte verpakking: 11.23 mm
Soort: PDIP-20
Type verpakking: PDIP
Aantal per verpakking: 20 stuk(s)
Temperatuur bij opslag: -65 - 150 °C
Bedrijfstemperatuur (T-T): 0 - 70 °C
Aantal pinnen: 20
Breedte (met pennen): 26.92 mm
Diepte (met pennen): 10.92 mm
Hoogte (met pennen): 8.26 mm

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