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74ACT280
9 BIT PARITY GENERATOR/CHECKER
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HIGH SPEED: tPD = 4 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION: ICC = 4 A (MAX.) at TA = 25 oC COMPATIBLE WITH TTL OUTPUTS VIH = 2V (MIN), VIL = 0.8V (MAX) 50 TRANSMISSION LINE DRIVING CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL = 24 mA (MIN) BALANCED PROPAGATION DELAYS: tPLH tPHL OPERATING VOLTAGE RANGE: VCC (OPR) = 4.5V to 5.5V PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 280 IMPROVED LATCH-UP IMMUNITY
B M (Plastic Package) (Micro Package) ORDER CODES : 74ACT280B 74ACT280M 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. Conservely, 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. The device is designed to interface directly High Speed CMOS systems with TTL, NMOS and CMOS output voltage levels. All inputs and outputs are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.
DESCRIPTION The AC280 is an advanced high-speed CMOS 9 BIT PARITY GENERATOR - CHECKER fabricated with sub-micron silicon gate and double-layer metal wiring C2MOS technology. It is ideal for low power applications mantaining high speed operation similar to eqivalent Bipolar Schottky TTL. It is composed of nine data inputs (A to I) and odd/even parity outputs (ODD and EVEN). The PIN CONNECTION AND IEC LOGIC SYMBOLS
December 1998
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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 ODD A to I NAME AND FUNCT ION Parity Outputs Data Inputs
NC GND VCC
No Connection Ground (0V) Positive Supply Voltage
TRUTH TABLE
NUMBER OF INPUT A TRHU I T HAT ARE HIGH 0, 2, 4, 6, 8 1, 3, 5, 7, 9 EVEN H L OUTPUT ODD L H
LOGIC DIAGRAM
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ABSOLUTE MAXIMUM RATINGS
Symbol VCC VI VO IIK IOK IO Tstg TL Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Current 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 50 200 -65 to +150 300 Unit V V V mA mA mA mA
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ICC or IGND DC VCC or Ground Current
C C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied.
RECOMMENDED OPERATING CONDITIONS
Symbol VCC VI VO Top dt/dv Supply Voltage Input Voltage Output Voltage Operating Temperature: Input Rise and Fall Time VCC = 4.5 to 5.5V (note 1) Parameter Value 4.5 to 5.5 0 to VCC 0 to VCC -40 to +85 8 Unit V V V
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ns/V
1) VIN from 0.8 V to 2.0 V
DC SPECIFICATIONS
Symb ol Parameter V CC (V) VIH VIL VOH High Level Input Voltage Low Level Input Voltage High Level Output Voltage 4.5 5.5 4.5 5.5 4.5 5.5 4.5 5.5 VOL Low Level Output Voltage 4.5 5.5 4.5 5.5 II ICCT ICC IOLD IOHD Input Leakage Current Max ICC /Input Quiescent Supply Current Dynamic Output Current (note 1, 2) 5.5 5.5 5.5 5.5 V I (* ) = V IH or V IL VO = 0.1 V or VCC - 0.1 V VO = 0.1 V or VCC - 0.1 V V I (* ) = V IH or V IL IO=-50 A IO=-50 A IO=-24 mA IO=-24 mA IO=50 A IO=50 mA IO=24 mA IO=24 mA VI = VCC or GND VI = VCC -2.1 V VI = VCC or GND VOLD = 1.65 V max VOHD = 3.85 V min 0.6 4 4.4 5.4 3.86 4.86 0.001 0.001 0.1 0.1 0.36 0.36 0.1 Test Co nditions
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Valu e T A = 25 C Min. 2.0 2.0 T yp. 1.5 1.5 1.5 1.5 4.49 5.49 0.8 0.8 4.4 5.4 3.76 4.76 0.1 0.1 0.44 0.44 1 1.5 40 75 -75 Max. -40 to 85 C Min. 2.0 2.0 0.8 0.8 Max.
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V V V
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A mA A mA mA
1) Maximum test duration 2ms, one output loaded attime 2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50 .
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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 , Input tr = tf =3 ns)
Symb ol Parameter V CC (V) tPLH tPHL Propagation Delay Time (Input - ODD, EVEN) 5.0(*) T est Con ditio n Valu e T A = 25 oC -40 to 85 o C Min. T yp. Max. Min. Max. 3.0 8.5 13.0 2.0 14.5 Un it
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(*) Voltage range is 5V 0.5V
CAPACITIVE CHARACTERISTICS
Symb ol Parameter V CC (V) C IN CPD Input Capacitance Power Dissipation Capacitance (note 1) 5.0 5.0 Test Co nditions
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Valu e T A = 25 C Min. T yp. 4 75 Max. -40 to 85 C Min. Max.
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pF pF
1) CPD isdefined as the value of the IC'sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto Test Circuit).Average operating current can be obtained by the following equation. ICC(opr) = CPD * VCC * fIN + ICC
TEST CIRCUIT
CL = 50 pF or equivalent (includes jigand probe capacitance) RL = R1 = 500 orequivalent RT = ZOUT of pulse generator (typically 50)
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WAVEFORM: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
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Plastic DIP-14 MECHANICAL DATA
mm 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 inch TYP. MAX.
DIM.
P001A
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SO-14 MECHANICAL DATA
DIM. MIN. 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 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
P013G
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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. Specification 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. The ST logo is a registered trademark of STMicroelectronics (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com .
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