8-bit Identity Comparator

www.DataSheet4U.com 74AC11520 8-BIT IDENTITY COMPARATOR SCAS025C – JULY 1987 – REVISED APRIL 1996 D D D D D D Compares Two 8-Bit Words Center-Pin VCC and GND Configurations Minimize High-Speed Switching Noise EPICt (Enhanced-Performance Implanted CMOS) 1-m m Process 500-mA Typical Latch-Up Immunity at 125°C Equivalent of 20-kW Pullup Resistor on Q Inputs Package Options Include Plastic Small-Outline Packages (DW) and Standard Plastic 300-mil DIPs (N) DW OR N PACKAGE (TOP VIEW) Q1 P1 Q0 P0 GND P=Q Q7 P7 Q6 P6 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 G P2 Q2 P3 Q3 VCC P4 Q4 P5 Q5 description This identity comparator performs comparisons on two 8-bit binary or BCD words. Features include 20-kΩ pullup termination resistors on the Q inputs for analog or switch data and a P = Q totem-pole output. The 74AC11520 is characterized for operation from –40°C to 85°C. FUNCTION TABLE INPUTS DATA P, Q P=Q P>Q P VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DW package . . . . . . . . . . . . . . . . . . 1.6 W N package . . . . . . . . . . . . . . . . . . . . 1.3 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 maximum package power dissipation is calculated using a junction temperature of 150_ C and a board trace length of 750 mils, except for the N package, which has a trace length of zero. recommended operating conditions MIN VCC VIH Supply voltage High-level input voltage VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V VIL VI VO IOH Low-level input voltage Input voltage Output voltage High-level output current VCC = 3 V VCC = 4.5 V VCC = 5.5 V VCC = 3 V IOL Low-level output current Input transition rise or fall rate Operating free-air temperature VCC = 4.5 V VCC = 5.5 V 0 –40 VCC = 4.5 V VCC = 5.5 V 0 0 3 2.1 3.15 3.85 0.9 1.35 1.65 VCC VCC –4 –24 –24 12 24 24 10 85 ns/V °C mA mA V V V V NOM 5 MAX 5.5 UNIT V D t/D v TA 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 www.DataSheet4U.com 74AC11520 8-BIT IDENTITY COMPARATOR SCAS025C – JULY 1987 – REVISED APRIL 1996 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC 3V IOH = –50 m A VOH IOH = –4 mA IOH = –24 mA 24 IOH = –75 mA{ 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 3V IOL = 50 m A VOL IOL = 12 mA IOL = 24 mA IOL = 75 mA{ VI = VCC, VI = GND, VI = VCC or GND, Q inputs at GND, Q inputs open, 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V Q inputs only Q inputs only P and G inputs only Other inputs VI = VCC or GND Other inputs VI = VCC or GND 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 2.3 –0.3 10 –0.6 ±0.1 4.8 8 0.1 0.1 0.1 0.36 0.36 0.36 MIN 2.9 4.4 5.4 2.58 3.94 4.94 TA = 25°C TYP MAX 2.9 MIN 2.9 4.4 5.4 2.48 3.8 4.8 3.85 0.1 0.1 0.1 0.44 0.44 0.44 1.65 10 –1 ±1 8 80 mA MAX UNIT V V IIH IIL II ICC Ci mA mA mA mA VI = VCC or GND 5V 3.5 † Not more than one output or input should be tested at a time and the duration of the test should not exceed 10 ms. pF switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1) PARAMETER tPLH tPHL tPLH tPHL FROM (INPUT) P or Q G TO (OUTPUT) P=Q P=Q MIN 1.5 1.5 1.5 1.5 TA = 25°C TYP MAX 12 10.4 6.9 6.3 16.5 14.4 9 8.6 MIN 1.5 1.5 1.5 1.5 MAX 18.6 16.3 10 9.5 UNIT ns ns switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER tPLH tPHL tPLH tPHL FROM (INPUT) P or Q G TO (INPUT) P=Q P=Q TA = 25°C MIN TYP MAX 1.5 1.5 1.5 1.5 8.1 7.1 4.9 4.8 11.1 10.1 6.6 7.1 MIN 1.5 1.5 1.5 1.5 MAX 12.6 11.3 7.4 7.8 UNIT ns ns POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 5 www.DataSheet4U.com 74AC11520 8-BIT IDENTITY COMPARATOR SCAS025C – JULY 1987 – REVISED APRIL 1996 operating characteristics, VCC = 5 V, TA = 25°C PARAMETER Cpd Power dissipation capacitance TEST CONDITIONS CL = 50 pF, f = 1 MHz TYP 42 UNIT pF PARAMETER MEASUREMENT INFORMATION From Output Under Test CL = 50 pF (see Note A) 500 Ω Output LOAD CIRCUIT Input (see Note B) tPHL VCC 50% VCC 50% VCC 0V tPLH VOH 50% VCC VOL VOLTAGE WAVEFORMS 50% VCC NOTES: A. CL includes probe and jig capacitance. B. Input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns. C. The outputs are measured one at a time with one input transition per measurement. Figure 1. Load Circuit and Voltage Waveforms TYPICAL CHARACTERISTICS Q INPUT CURRENT vs INPUT VOLTAGE 0 VCC = 5 V, TA = 25°C – 50 III – Input Current – µ A uA I – 100 – 150 – 200 – 250 – 300 0 1 2 3 4 5 6 VI – Input Voltage – V Figure 2 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 www.DataSheet4U.com 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. 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