

SDFS008A − D2932, APRIL 1986 − REVISED OCTOBER 1993
Copyright 1993, Texas Instruments Incorporated
2−1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
•Generates Either Odd or Even Parity for
Nine Data Lines
•Cascadable for N-Bits Parity
•Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
These universal, monolithic, 9-bit parity
generators/checkers feature odd and even
outputs t o facilitate operation of either odd or even
parity application. The word-length capability is
easily expanded by cascading.
The SN54F280B is characterized for operation
over the full military temperature range of −55°C
to 125°C. The SN74F280B is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
NO. OF INPUTS
A THRU I
OUTPUTS
A THRU I
THAT ARE HIGH Σ EVEN Σ ODD
0, 2, 4, 6, 8 H L
1, 3, 5, 7, 9 L H
logic symbol†
2k
12
E
8
A9
B10
C11
D
13
F1
G2
H4
I
6
5Σ EVEN
Σ ODD
†This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
SN54F280B ...J PACKAGE
SN74F280B ...D OR N PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
E
NC
D
NC
C
NC
NC
I
NC
Σ EVEN
SN54F280B ...FK PACKAGE
(TOP VIEW)
H
G
NC
A
BF
ODD
GND
NC
NC − No internal connection
VCC
1
2
3
4
5
6
7
14
13
12
11
10
9
8
G
H
NC
I
Σ EVEN
Σ ODD
GND
VCC
F
E
D
C
B
A
Σ
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'+('!5 #" &.. ,&$&%+'+$(0


SDFS008A − D2932, APRIL 1986 − REVISED OCTOBER 1993
2−2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
logic diagram (positive logic)
A
B
C
8
9
10
D
E
F
11
12
13
G
H
I
1
2
4
5
6
Σ EVEN
Σ ODD
Pin numbers shown are for the D, J, and N packages.


SDFS008A − D2932, APRIL 1986 − REVISED OCTOBER 1993
2−3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
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 (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 high state −0.5 V to VCC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54F280B −55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F280B 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.
recommended operating conditions
SN54F280B SN74F280B
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 input voltage 0.8 0.8 V
IIK Input clamp current −18 −18 mA
IOH High-level output current −1 −1 mA
IOL Low-level output current 20 20 mA
TAOperating free-air temperature −55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F280B SN74F280B
UNIT
PARAMETER
TEST CONDITIONS
MIN TYP‡MAX MIN TYP‡MAX
UNIT
VIK VCC = 4.5 V, II = −18 mA −1.2 −1.2 V
VOH
VCC = 4.5 V IOH = − 1 mA 2.5 3.4 2.5 3.4
V
VOH VCC = 4.75 V, IOH = − 1 mA 2.7 V
VOL VCC = 4.5 V IOL = 20 mA 0.3 0.5 0.3 0.5 V
IIVCC = 0, VI = 7 V 0.1 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL VCC = 5.5 V, VI = 0.5 V −20 −20 µA
IOS§VCC = 5.5 V, VO = 0 −60 −150 −60 −150 mA
ICC VCC = 5.5 V, VI = 0 26 35 26 35 mA
‡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.


SDFS008A − D2932, APRIL 1986 − REVISED OCTOBER 1993
2−4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
switching characteristics (see Note 2)
PARAMETER FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
RL = 500 Ω,
TA = 25°C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500Ω,
TA = MIN to MAX†UNIT
(INPUT)
(OUTPUT)
′F280B SN54F280B SN74F280B
MIN TYP MAX MIN MAX MIN MAX
tPLH
Any input
Σ EVEN
3.2 6.1 9 2.7 13 2.7 10
ns
tPHL Any input Σ EVEN 3.2 6.6 10 2.7 15 2.7 11 ns
tPLH
Any input
Σ ODD
3.2 6.1 9 2.7 14 2.7 10
ns
tPHL
Any input
Σ
ODD
3.2 6.6 10 2.7 14 2.7 11
ns
†For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and waveforms are shown in Section 1.
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SN74F280BDR SOIC D 14 2500 330.0 16.4 6.5 9.0 2.1 8.0 16.0 Q1
SN74F280BNSR SO NS 14 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SN74F280BDR SOIC D 14 2500 367.0 367.0 38.0
SN74F280BNSR SO NS 14 2000 367.0 367.0 38.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
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