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HD74LS280
9-bit Odd / Even Parity Generator / Checker
REJ03D0475-0300 Rev.3.00 Jul.15.2005 This parity generator / checker offers the designer a trade-off between reduced power consumption and high performance. Although the HD74LS280 is implemented without expander inputs, the corresponding function is provided by the availability of an input at pin 4 and the absence of any internal connection at pin 3.
Features
* Ordering Information
Part Name HD74LS280P HD74LS280FPEL Package Type DILP-14 pin SOP-14 pin (JEITA) Package Code (Previous Code) PRDP0014AB-B (DP-14AV) Package Abbreviation P Taping Abbreviation (Quantity) -- EL (2,000 pcs/reel)
PRSP0014DF-B FP (FP-14DAV) Notes: Please consult the sales office for the above package availability.
Pin Arrangement
G Inputs H NC Input I Even Outputs Odd GND
1 G 2 3 4 5 6 7 I Even Odd A H F E D C B
14 13 12 11 10 9 8
VCC F E D Inputs C B A
(Top view)
Function Table
Number of inputs A through I that are high 0, 2, 4, 6, 8 1, 3, 5, 7, 9 Outputs Even H L Odd L H
Rev.3.00, Jul.15.2005, page 1 of 5
HD74LS280
Block Diagram
A B C Even
D E F Odd G H I
Absolute Maximum Ratings
Item Supply voltage Input voltage Power dissipation Storage temperature Symbol VCC VIN PT Tstg Ratings 7 7 400 -65 to +150 Unit V V mW C
Note: Voltage value, unless otherwise noted, are with respect to network ground terminal.
Recommended Operating Conditions
Item Supply voltage Output current Operating temperature Symbol VCC IOH IOL Topr Min 4.75 -- -- -20 Typ 5.00 -- -- 25 Max 5.25 -400 8 75 Unit V A mA C
Rev.3.00, Jul.15.2005, page 2 of 5
HD74LS280
Electrical Characteristics
(Ta = -20 to +75 C)
Item Input voltage Symbol VIH VIL VOH Output voltage VOL IIH IIL min. 2.0 -- 2.7 -- -- -- -- -- -20 -- -- typ.* -- -- -- -- -- -- -- -- -- 16 -- max. -- 0.8 -- 0.4 0.5 20 -0.4 0.1 -100 27 -1.5 Unit V V V V A mA mA mA mA V Condition
VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V, IOH = -400 A IOL = 4 mA VCC = 4.75 V, VIH = 2 V, IOL = 8 mA VIL = 0.8 V VCC = 5.25 V, VI = 2.7 V VCC = 5.25 V, VI = 0.4 V VCC = 5.25 V, VI = 7 V VCC = 5.25 V VCC = 5.25 V VCC = 4.75 V, IIN = -18 mA
Input current
II Short-circuit output current IOS Supply current** ICC Input clamp voltage VIK Notes: * VCC = 5 V, Ta = 25C ** ICC is measured with all outputs open and all inputs grounded.
Switching Characteristics
(VCC = 5 V, Ta = 25C)
Item Symbol tPLH tPHL tPLH tPHL Outputs Even Odd min. -- -- -- -- typ. 33 29 23 31 max. 50 45 45 50 Unit ns ns ns ns Condition
Propagation delay time
CL = 15 pF, RL = 2 k
Rev.3.00, Jul.15.2005, page 3 of 5
HD74LS280
Testing Method
Test Circuit
4.5V VCC Output
Load circuit 1 A Input RL even CL
See Function Table
B C D E F G H I
P.G. Zout = 50
Output odd Same as Load Circuit 1.
Notes:
1. CL includes probe and jig capacitance. 2. All diodes are 1S2074(H).
Waveform
tTLH 90% 1.3 V 10% tPLH tTHL 90% 1.3 V 10% tPHL VOH In phase output tPHL 1.3 V tPLH VOH Out of phase output 1.3 V 1.3 V VOL 1.3 V VOL 3V 0V
Input
Note:
Input pulse; tTLH 15 ns, tTHL 6 ns, PRR = 1 MHz, duty cycle 50%.
Rev.3.00, Jul.15.2005, page 4 of 5
HD74LS280
Package Dimensions
JEITA Package Code P-DIP14-6.3x19.2-2.54 RENESAS Code PRDP0014AB-B Previous Code DP-14AV MASS[Typ.] 0.97g
D
14
8
1 b3
7
Z
E
Reference Symbol
Dimension in Millimeters Min Nom 7.62 19.2 6.3 20.32 7.4 5.06 0.51 0.40 0.48 1.30 0.19 0 2.29 2.54 0.25 0.31 15 2.79 2.39 2.54 0.56 Max
A
A1
e1 D E
L
A A1 bp
e
bp
e1
c
b3 c
e Z
( Ni/Pd/Au plating )
L
JEITA Package Code P-SOP14-5.5x10.06-1.27
RENESAS Code PRSP0014DF-B
Previous Code FP-14DAV
MASS[Typ.] 0.23g
*1
D 8
F
NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET.
14
bp
HE
E
Index mark
*2
c
Reference Symbol
Dimension in Millimeters Min Nom 10.06 5.50 Max 10.5
Terminal cross section ( Ni/Pd/Au plating )
1 Z e
*3
D E A2 A1 0.00
7 bp x M L1
0.10
0.20 2.20
A bp b1 c c
1
0.34
0.40
0.46
0.15
0.20
0.25
A
HE
0 7.50 7.80 1.27
8 8.00
A1
y L
e x y
0.12 0.15 1.42 0.50
1
Detail F
Z L L 0.70 1.15
0.90
Rev.3.00, Jul.15.2005, page 5 of 5
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