54AC280 9-Bit Parity Generator/Checker General Description Features The ’AC280 is a high-speed parity generator/checker that accepts nine bits of input data and detects whether an even or an odd number of these inputs is HIGH. If an even number of inputs is HIGH, the Sum Even output is HIGH. If an odd number is HIGH, the Sum Even output is LOW. The Sum Odd output is the complement of the Sum Even output. n ICC reduced by 50% n 9-bit width for memory applications n Standard Microcircuit Drawing (SMD) 5962-92201 Logic Symbols Connection Diagrams Pin Assignment for DIP and Flatpak DS100359-1 IEEE/IEC DS100359-2 Pin Assignment for LCC DS100359-4 Pin Names Description DS100359-3 I0–I8 Data Inputs ∑O Odd Parity Output ∑E Even Parity Output Truth Table Number of HIGH Inputs Outputs ∑ Even ∑ Odd I0–I8 0, 2, 4, 6, 8 H L 1, 3, 5, 7, 9 L H H = HIGH Voltage Level L = LOW Voltage Level FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100359 www.national.com 54AC280 9-Bit Parity Generator/Checker September 1998 Logic Diagram DS100359-5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.national.com 2 Absolute Maximum Ratings (Note 1) CDIP If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) Junction Temperature (TJ) 175˚C Recommended Operating Conditions −0.5V to +7.0V Supply Voltage (VCC) ’AC Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC Minimum Input Edge Rate (∆V/∆t) ’AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V ± 50 mA 2.0V to 6.0V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns Note 1: Absolute maximum ratings are those values beyond which damage to the device may occur. The databook specifications should be met, without exception, to ensure that the system design is reliable over its power supply, temperature, output/input loading variables. National does not recommend operation of FACT circuits outside databook specifications. ± 50 mA −65˚C to +150˚C DC Characteristics for ’AC Family Devices Symbol Parameter 54AC TA = VCC (V) Units Conditions −55˚C to +125˚C Guaranteed Limits VIH VIL VOH Minimum High Level 3.0 2.1 Input Voltage 4.5 3.15 5.5 3.85 Maximum Low Level 3.0 0.9 Input Voltage 4.5 1.35 5.5 1.65 Minimum High Level 3.0 2.9 Output Voltage 4.5 4.4 5.5 5.4 VOUT = 0.1V V or VCC − 0.1V V or VCC − 0.1V VOUT = 0.1V IOUT = −50 µA V (Note 2) VIN = VIL or VIH VOL 3.0 2.4 4.5 3.7 5.5 4.7 Maximum Low Level 3.0 0.1 Output Voltage 4.5 0.1 5.5 0.1 IOH = −12 mA V IOH = −24 mA IOH = −24 mA IOUT = 50 µA V (Note 2) VIN = VIL or VIH IIN Maximum Input 3.0 0.50 4.5 0.50 5.5 0.50 5.5 ± 1.0 IOL = 12 mA V IOL = 24 mA µA IOL = 24 mA VI = VCC, GND Leakage Current IOLD IOHD Minimum Dynamic Output Current (Note 3) 5.5 50 mA VOLD = 1.65V Max 5.5 −50 mA VOHD = 3.85V Min 3 www.national.com DC Characteristics for ’AC Family Devices (Continued) Symbol 54AC TA = Parameter VCC (V) Units Conditions −55˚C to +125˚C Guaranteed Limits ICC Maximum Quiescent 5.5 80.0 µA Supply Current VIN = VCC or GND Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. Note 4: IIN and ICC @ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V VCC. AC Electrical Characteristics VCC 54AC TA = −55˚C Parameter (V) (Note 5) to +125˚C CL = 50 pF tPLH Propagation Delay 3.3 1.0 20.0 tPHL In to ∑E 5.0 1.0 14.5 tPLH Propagation Delay 3.3 1.0 20.0 tPHL In to ∑O 5.0 1.0 14.5 Symbol Min Max Note 5: Voltage range 3.3 is 3.3V ± 0.3V. Voltage range 5.0 is 5.0V ± 0.5V. Capacitance Typ Units CIN Symbol Input Capacitance 4.5 pF CPD Power Dissipation Capacitance 75.0 pF www.national.com Parameter 4 Units Conditions VCC = OPEN VCC = 5.0V ns ns Physical Dimensions inches (millimeters) unless otherwise noted 20 Terminal Ceramic Leadless Chip Carrier NS Package Number E20A 14 Lead Ceramic Dual-In-Line Package NS Package Number J14A 5 www.national.com 54AC280 9-Bit Parity Generator/Checker Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 14 Lead Ceramic Flatpak (F) NS Package Number W14B LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. 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