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M74HC280
9 BIT PARITY GENERATOR
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HIGH SPEED : tPD = 22ns (TYP.) at VCC = 6V LOW POWER DISSIPATION: ICC =4A(MAX.) at TA=25C HIGH NOISE IMMUNITY: VNIH = V NIL = 28 % VCC (MIN.) SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 4mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL WIDE OPERATING VOLTAGE RANGE: VCC (OPR) = 2V to 6V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 280
DIP
SOP
TSSOP
ORDER CODES
PACKAGE DIP SOP TSSOP TUBE M74HC280B1R M74HC280M1R T&R M74HC280RM13TR M74HC280TTR
DESCRIPTION The M74HC280 is an high speed CMOS 9-BIT PARITY GENERATOR fabricated with silicon gate C2MOS technology. It is composed of nine data inputs (A to I) and odd/ even parity outputs (ODD and EVEN). The nine data inputs control the output conditions. When the number of high level input is odd, ODD output is kept high and EVEN output low.
Conversely, when the output is even, EVEN output is kept high and ODD low. The IC generates either odd or even parity making it flexible application. The word-length capability is easily expanded by cascading. All inputs are equipped with protection circuits against static discharge and transient excess voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
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M74HC280
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
PIN No 5, 6 8, 9, 10, 11, 12, 13, 1, 2, 4 3 7 14 SYMBOL EVEN DD A to I NAME AND FUNCTION Parity Outputs Data Inputs
NC GND VCC
No Connection Ground (0V) Positive Supply Voltage
TRUTH TABLE
NUMBER OF INPUTS A - I THAT ARE HIGH EVEN 0, 2, 4, 6, 8 1, 3, 5, 7, 9 H L OUTPUTS ODD L H
LOGIC DIAGRAM
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M74HC280
ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO PD Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current Power Dissipation Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +7 -0.5 to VCC + 0.5 -0.5 to VCC + 0.5 20 20 25 50 500(*) -65 to +150 300 Unit V V V mA mA mA mA mW C C
ICC or IGND DC VCC or Ground Current
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied (*) 500mW at 65 C; derate to 300mW by 10mW/C from 65C to 85C
RECOMMENDED OPERATING CONDITIONS
Symbol VCC VI VO Top tr, tf Supply Voltage Input Voltage Output Voltage Operating Temperature Input Rise and Fall Time VCC = 2.0V VCC = 4.5V VCC = 6.0V Parameter Value 2 to 6 0 to VCC 0 to VCC -55 to 125 0 to 1000 0 to 500 0 to 400 Unit V V V C ns ns ns
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M74HC280
DC SPECIFICATIONS
Test Condition Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 2.0 4.5 6.0 4.5 6.0 VOL Low Level Output Voltage 2.0 4.5 6.0 4.5 6.0 II ICC Input Leakage Current Quiescent Supply Current 6.0 6.0 IO=-20 A IO=-20 A IO=-20 A IO=-4.0 mA IO=-5.2 mA IO=20 A IO=20 A IO=20 A IO=4.0 mA IO=5.2 mA VI = VCC or GND VI = VCC or GND TA = 25C Min. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.18 5.68 2.0 4.5 6.0 4.31 5.8 0.0 0.0 0.0 0.17 0.18 0.1 0.1 0.1 0.26 0.26 0.1 4 1.9 4.4 5.9 4.13 5.63 0.1 0.1 0.1 0.33 0.33 1 40 Typ. Max. Value -40 to 85C Min. 1.5 3.15 4.2 0.5 1.35 1.8 1.9 4.4 5.9 4.10 5.60 0.1 0.1 0.1 0.40 0.40 1 80 A A V V Max. -55 to 125C Min. 1.5 3.15 4.2 0.5 1.35 1.8 Max. V Unit
VIH
High Level Input Voltage Low Level Input Voltage High Level Output Voltage
VIL
V
VOH
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns)
Test Condition Symbol Parameter VCC (V) 2.0 4.5 6.0 2.0 4.5 6.0 TA = 25C Min. Typ. 30 8 7 80 26 22 Max. 75 15 13 200 40 34 Value -40 to 85C Min. Max. 95 19 16 250 50 43 -55 to 125C Min. Max. 110 22 19 290 58 49 ns Unit
tTLH tTHL Output Transition Time tPLH tPHL Propagation Delay Time (Input to EVEN,ODD)
ns
CAPACITIVE CHARACTERISTICS
Test Condition Symbol Parameter VCC (V) 5.0 5.0 TA = 25C Min. Typ. 5 61 Max. 10 Value -40 to 85C Min. Max. 10 -55 to 125C Min. Max. 10 pF pF Unit
CIN CPD
Input Capacitance Power Dissipation Capacitance (note 1)
1) CPD is defined as the value of the IC's internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC
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M74HC280
TEST CIRCUIT
CL = 50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50)
WAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
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M74HC280
Plastic DIP-14 MECHANICAL DATA
mm. DIM. MIN. a1 B b b1 D E e e3 F I L Z 1.27 3.3 2.54 0.050 8.5 2.54 15.24 7.1 5.1 0.130 0.100 0.51 1.39 0.5 0.25 20 0.335 0.100 0.600 0.280 0.201 1.65 TYP MAX. MIN. 0.020 0.055 0.020 0.010 0.787 0.065 TYP. MAX. inch
P001A
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M74HC280
SO-14 MECHANICAL DATA
DIM. A a1 a2 b b1 C c1 D E e e3 F G L M S 3.8 4.6 0.5 8.55 5.8 1.27 7.62 4.0 5.3 1.27 0.68 8 (max.) 0.149 0.181 0.019 8.75 6.2 0.35 0.19 0.5 45 (typ.) 0.336 0.228 0.050 0.300 0.157 0.208 0.050 0.026 0.344 0.244 0.1 mm. MIN. TYP MAX. 1.75 0.2 1.65 0.46 0.25 0.013 0.007 0.019 0.003 MIN. inch TYP. MAX. 0.068 0.007 0.064 0.018 0.010
PO13G
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M74HC280
TSSOP14 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.45 0.60 0.05 0.8 0.19 0.09 4.9 6.2 4.3 5 6.4 4.4 0.65 BSC 8 0.75 0 0.018 0.024 1 TYP MAX. 1.2 0.15 1.05 0.30 0.20 5.1 6.6 4.48 0.002 0.031 0.007 0.004 0.193 0.244 0.169 0.197 0.252 0.173 0.0256 BSC 8 0.030 0.004 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.0089 0.201 0.260 0.176 inch
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1
0080337D
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M74HC280
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2001 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom (c) http://www.st.com
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