SN54HC42, SN74HC42 4-LINE TO 10-LINE DECODERS (1 of 10) SCLS091B – DECEMBER 1982 – REVISED MAY 1997 D D D D SN54HC42 . . . J OR W PACKAGE SN74HC42 . . . D OR N PACKAGE (TOP VIEW) Full Decoding of Input Logic All Outputs Are High for Invalid BCD Conditions Also for Applications as 3-Line to 8-Line Decoders Package Options Include Plastic Small-Outline (D) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs 0 1 2 3 4 5 6 GND 1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 VCC A B C D 9 8 7 description SN54HC42 . . . FK PACKAGE (TOP VIEW) 1 0 NC VCC A These monolithic decimal decoders consist of eight inverters and ten 4-input NAND gates. The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates. Full decoding of valid input logic ensures that all inputs remain off for all invalid input conditions. 2 3 NC 4 5 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 B C NC D 9 6 GND NC 7 8 The SN54HC42 is characterized for operation over the full military temperature range of –55°C to 125°C. The SN74HC42 is characterized for operation from –40°C to 85°C. 4 NC – No internal connection FUNCTION TABLE INPUTS NO NO. OUTPUTS D C B A 0 1 2 3 4 5 6 7 8 9 0 L L L L L H H H H H H H H H 1 L L L H H L H H H H H H H H 2 L L H L H H L H H H H H H H 3 L L H H H H H L H H H H H H 4 L H L L H H H H L H H H H H 5 L H L H H H H H H L H H H H 6 L H H L H H H H H H L H H H 7 L H H H H H H H H H H L H H 8 H L L L H H H H H H H H L H 9 H L L H H H H H H H H H H L H L H L H H H H H H H H H H H L H H H H H H H H H H H H H H L L H H H H H H H H H H H H L H H H H H H H H H H H H H H L H H H H H H H H H H H H H H H H H H H H H H H H Invalid Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Copyright 1997, 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 1 SN54HC42, SN74HC42 4-LINE TO 10-LINE DECODERS (1 of 10) SCLS091B – DECEMBER 1982 – REVISED MAY 1997 logic symbol† BCD/DEC 0 1 A B C D 15 14 13 12 2 1 2 4 8 3 4 5 6 7 8 9 1 2 3 4 5 6 7 9 10 11 0 1 2 3 4 5 6 7 8 9 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the D, J, N, and W packages. logic diagram (positive logic) 1 0 15 A 2 1 3 2 4 B 3 14 5 4 6 13 5 C 7 9 12 6 7 D 10 8 11 Pin numbers shown are for the D, J, N, and W packages. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 SN54HC42, SN74HC42 4-LINE TO 10-LINE DECODERS (1 of 10) SCLS091B – DECEMBER 1982 – REVISED MAY 1997 absolute maximum ratings over operating free-air temperature range† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±25 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Package thermal impedance, θJA (see Note 2): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78°C/W Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a trace length of zero. recommended operating conditions SN54HC42 VCC Supply voltage VIH High-level input voltage VCC = 2 V VCC = 4.5 V VCC = 6 V VCC = 2 V VIL Low-level input voltage VI VO Input voltage Output voltage tt Input transition (rise and fall) time TA SN74HC42 MIN NOM MAX MIN NOM MAX 2 5 6 2 5 6 1.5 1.5 3.15 3.15 4.2 4.2 0.5 0 0.5 0 1.35 0 1.35 0 1.8 0 1.8 0 0 0 VCC VCC 0 VCC VCC VCC = 2 V VCC = 4.5 V 0 1000 0 1000 0 500 0 500 VCC = 6 V 0 400 0 400 –55 125 –40 85 Operating free-air temperature POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 V V 0 VCC = 4.5 V VCC = 6 V UNIT V V V ns °C 3 SN54HC42, SN74HC42 4-LINE TO 10-LINE DECODERS (1 of 10) SCLS091B – DECEMBER 1982 – REVISED MAY 1997 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC IOH = –20 µA VOH VI = VIH or VIL IOH = –4 mA IOH = –5.2 mA IOL = 20 µA VOL VI = VIH or VIL IOL = 4 mA IOL = 5.2 mA II ICC VI = VCC or 0 VI = VCC or 0, IO = 0 MIN TA = 25°C TYP MAX SN74HC42 MIN MIN MAX 2V 1.9 1.998 1.9 1.9 4.5 V 4.4 4.499 4.4 4.4 6V 5.9 5.999 5.9 5.9 4.5 V 3.98 4.3 3.7 3.84 6V 5.48 5.8 5.2 MAX UNIT V 5.34 2V 0.002 0.1 0.1 0.1 4.5 V 0.001 0.1 0.1 0.1 6V 0.001 0.1 0.1 0.1 4.5 V 0.17 0.26 0.4 0.33 6V 0.15 0.26 0.4 0.33 6V ±0.1 ±100 ±1000 ±1000 nA 8 160 80 µA 3 10 10 10 pF 6V Ci SN54HC42 2 V to 6 V V switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) TA = 25°C TYP MAX SN54HC42 SN74HC42 MIN MIN PARAMETER FROM (INPUT) TO (OUTPUT) VCC 2V 65 150 225 190 tpd A, B, C, or D 0–9 4.5 V 18 30 45 38 6V 14 26 38 32 tt Any MIN MAX MAX 2V 28 75 110 95 4.5 V 8 15 22 19 6V 7 13 19 16 UNIT ns ns operating characteristics, TA = 25°C PARAMETER Cpd 4 TEST CONDITIONS Power dissipation capacitance No load POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 TYP 39 UNIT pF SN54HC42, SN74HC42 4-LINE TO 10-LINE DECODERS (1 of 10) SCLS091B – DECEMBER 1982 – REVISED MAY 1997 PARAMETER MEASUREMENT INFORMATION From Output Under Test Test Point Input VCC 50% 50% 0V CL = 50 pF (see Note A) tPLH In-Phase Output LOAD CIRCUIT 50% 10% tPHL 90% 90% tr Input 50% 10% 90% 90% tr tPHL VCC 50% 10% 0 V Out-of-Phase Output 90% tf VOH 50% 10% VOL tf tPLH 50% 10% tf 50% 10% 90% VOH VOL tr VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT TRANSITION TIMES VOLTAGE WAVEFORM INPUT RISE AND FALL TIMES NOTES: A. CL includes probe and test-fixture capacitance. B. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns. C. The outputs are measured one at a time with one input transition per measurement. D. tPLH and tPHL are the same as tpd. Figure 1. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 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. 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