SN54HC684, SN74HC684 8-BIT MAGNITUDE COMPARATORS SCLS340A – MARCH 1996 – REVISED MAY 1997 D D Compare Two 8-Bit Words Package Options Include Plastic Small-Outline (DW) and Ceramic Flat (W) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs SN54HC684 . . . J OR W PACKAGE SN74HC684 . . . DW OR N PACKAGE (TOP VIEW) P>Q P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND description These magnitude comparators perform comparisons of two 8-bit binary or BCD words. These devices provide P = Q and P > Q outputs. The SN54HC684 is characterized for operation over the full military temperature range of –55°C to 125°C. The SN74HC684 is characterized for operation from –40°C to 85°C. P>Q L H OUTPUTS H L P<Q H H 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC P=Q Q7 P7 Q6 P6 Q5 P5 Q4 P4 The P < Q function can be generated by applying P = Q and P > Q to a 2-input NAND gate. P1 Q1 P2 Q2 P3 4 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 Q7 P7 Q6 P6 Q5 Q3 GND P4 Q4 P5 P>Q 19 Q0 P0 P>Q VCC P=Q P=Q P=Q 20 2 SN54HC684 . . . FK PACKAGE (TOP VIEW) FUNCTION TABLE DATA INPUTS P, Q 1 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 UNLESS OTHERWISE NOTED this document contains PRODUCTION DATA information 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 SN54HC684, SN74HC684 8-BIT MAGNITUDE COMPARATORS SCLS340A – MARCH 1996 – REVISED MAY 1997 logic symbol† P0 P1 P2 P3 P4 P5 P6 P7 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 2 0 COMP 4 6 8 11 P P=Q Q P>Q P=Q 13 15 17 3 7 0 5 7 9 12 14 16 18 7 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2 19 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 1 P>Q SN54HC684, SN74HC684 8-BIT MAGNITUDE COMPARATORS SCLS340A – MARCH 1996 – REVISED MAY 1997 logic diagram (positive logic) 19 P0 Q0 P1 Q1 P2 Q2 P3 Q3 P4 Q4 P5 Q5 P6 Q6 P7 Q7 P=Q 2 3 4 5 6 7 8 9 11 12 1 13 P>Q 14 15 16 17 18 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN54HC684, SN74HC684 8-BIT MAGNITUDE COMPARATORS SCLS340A – MARCH 1996 – REVISED MAY 1997 absolute maximum ratings over operating free-air temperature range† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input voltage range, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Output voltage range, VO (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCC + 0.5 V Input clamp current, IIK (VI < 0 or VI > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±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): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°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 SN54HC684 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) times TA 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 UNIT V V 0 VCC = 4.5 V VCC = 6 V PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. 4 SN74HC684 MIN V V V ns °C SN54HC684, SN74HC684 8-BIT MAGNITUDE COMPARATORS SCLS340A – MARCH 1996 – 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 IIH IIL VI = VCC VI = 0 ICC Ci VI = VCC or 0, IO = 0 MIN TA = 25°C TYP MAX SN54HC684 MIN MAX SN74HC684 MIN 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 4.30 3.7 3.84 6V 5.48 5.80 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 6V –0.1 –100 –1000 –1000 nA 8 160 80 µA 10 10 10 pF 6V 2 V to 6 V 3 V nA switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC TA = 25°C MIN TYP MAX 2V 130 275 413 344 tpd P or Q Any 4.5 V 26 55 88 69 6V 22 47 70 58 2V 38 75 110 95 4.5 V 8 15 22 19 6V 6 13 19 16 tt Any SN54HC684 MIN MAX SN74HC684 MIN MAX UNIT ns ns operating characteristics, TA = 25°C PARAMETER Cpd Power dissipation capacitance TEST CONDITIONS TYP UNIT No load 40 pF PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 SN54HC684, SN74HC684 8-BIT MAGNITUDE COMPARATORS SCLS340A – MARCH 1996 – 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 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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. 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TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof. Copyright 1998, Texas Instruments Incorporated