SN54F280B, SN74F280B 9-BIT PARITY GENERATORS/CHECKERS SDFS008A – D2932, APRIL 1986 – REVISED OCTOBER 1993 • • • SN54F280B . . . J PACKAGE SN74F280B . . . D OR N PACKAGE (TOP VIEW) 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 G H NC I Σ EVEN Σ ODD GND description These universal, monolithic, 9-bit parity generators/checkers feature odd and even outputs to facilitate operation of either odd or even parity application. The word-length capability is easily expanded by cascading. Σ EVEN Σ ODD H L 1, 3, 5, 7, 9 L H 13 3 12 4 11 5 10 6 9 7 8 VCC F E D C B A H G NC VCC F NC NC I NC Σ EVEN FUNCTION TABLE 0, 2, 4, 6, 8 14 2 SN54F280B . . . FK PACKAGE (TOP VIEW) 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. NO. OF INPUTS A THRU I THAT ARE HIGH 1 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 E NC D NC C Σ ODD GND NC A B OUTPUTS 4 NC – No internal connection logic symbol† A B C D E F G H I 8 2k 9 10 5 11 Σ EVEN 12 13 6 Σ ODD 1 2 4 † 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. Copyright 1993, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–1 SN54F280B, SN74F280B 9-BIT PARITY GENERATORS/CHECKERS SDFS008A – D2932, APRIL 1986 – REVISED OCTOBER 1993 logic diagram (positive logic) A B C D E F G H I 8 9 10 Σ EVEN 6 Σ ODD 11 12 13 1 2 4 Pin numbers shown are for the D, J, and N packages. 2–2 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54F280B, SN74F280B 9-BIT PARITY GENERATORS/CHECKERS SDFS008A – D2932, APRIL 1986 – REVISED OCTOBER 1993 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 VCC VIH Supply voltage VIL IIK Low-level input voltage IOH IOL High-level output current Low-level output current TA Operating free-air temperature High-level input voltage SN74F280B MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 2 2 Input clamp current – 55 UNIT V V 0.8 0.8 V – 18 – 18 mA –1 –1 mA 20 20 mA 70 °C 125 0 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VOL II IIH IIL IOS§ ICC TEST CONDITIONS VCC = 4.5 V, VCC = 4.5 V II = – 18 mA IOH = – 1 mA VCC = 4.75 V, VCC = 4.5 V IOH = – 1 mA IOL = 20 mA VCC = 0, VCC = 5.5 V, VI = 7 V VI = 2.7 V VCC = 5.5 V, VCC = 5.5 V, VI = 0.5 V VO = 0 SN54F280B TYP‡ MAX MIN SN74F280B TYP‡ MAX MIN – 1.2 2.5 3.4 – 1.2 2.5 3.4 0.5 0.3 0.5 V 0.1 0.1 mA 20 20 µA – 20 – 60 –150 – 60 VCC = 5.5 V, VI = 0 26 35 26 ‡ 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 V V 2.7 0.3 UNIT – 20 µA –150 mA 35 mA 2–3 SN54F280B, SN74F280B 9-BIT PARITY GENERATORS/CHECKERS SDFS008A – D2932, APRIL 1986 – REVISED OCTOBER 1993 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 = 500 Ω, TA = MIN to MAX† ′F280B tPLH tPHL Any input Σ EVEN tPLH tPHL Any input Σ ODD SN54F280B SN74F280B MIN TYP MAX MIN MAX MIN MAX 3.2 6.1 9 2.7 13 2.7 10 3.2 6.6 10 2.7 15 2.7 11 3.2 6.1 9 2.7 14 2.7 10 3.2 6.6 10 2.7 14 2.7 11 † 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. 2–4 POST OFFICE BOX 655303 UNIT • DALLAS, TEXAS 75265 ns ns IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. 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