SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 • TYPE SN74ALS518 INPUT PULLUP RESISTOR Yes G P0 Q0 P1 Q1 P2 Q2 P3 Q3 GND OUTPUT FUNCTION AND CONFIGURATION P = Q open collector ′ALS520 Yes P = Q totem pole ‡ SN74ALS521 No P = Q totem pole ‡ SN74ALS521 is identical to ′ALS688. 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 VCC P = Q / P = Q† Q7 P7 Q6 P6 Q5 P5 Q4 P4 † P = Q for SN74ALS518 P = Q for ′ALS520 and SN74ALS521 SN54ALS520 . . . FK PACKAGE (TOP VIEW) description Q0 P0 These identity comparators perform comparisons on two 8-bit binary or BCD words. The SN74ALS518 provides P = Q outputs, while the ′ALS520 and SN74ALS521 provide P = Q outputs. The SN74ALS518 has an open-collector output. The SN74ALS518 and ′ALS520 feature 20-kΩ pullup resistors on the Q inputs for analog or switch data. P1 Q1 P2 Q2 P3 4 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 The SN54ALS520 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74ALS518, SN74ALS520, and SN74ALS521 are characterized for operation from 0°C to 70°C. 3 P=Q • SN54ALS520 . . . J PACKAGE SN74ALS518, SN74ALS520, SN74ALS521 . . . DW OR N PACKAGE (TOP VIEW) Compare Two 8-Bit Words Choice of Totem-Pole or Open-Collector Outputs SN74ALS518 and ′ALS520 Have 20-kΩ Pullup Resistors on Q Inputs Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs G VCC • • FUNCTION TABLE INPUTS OUTPUTS DATA P, Q ENABLE G P=Q P=Q L H L P>Q L L H P<Q L L H X H L H P=Q Copyright 1995, 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 SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 logic symbols† ′ALS520 SN74ALS521 SN74ALS518 1 G P0 P1 P2 P3 P4 P5 P6 P7 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 2 COMP 1 G1 G 0 P0 4 P1 6 P2 8 P3 P 11 P4 13 P5 15 17 3 1P=Q 7 19 P6 P=Q 0 Q0 5 Q1 7 Q2 9 Q3 Q 12 Q4 14 Q5 16 18 P7 Q6 7 Q7 2 POST OFFICE BOX 655303 0 4 6 8 P 11 13 15 17 3 1P=Q 7 0 5 7 9 Q 12 14 16 18 † These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2 COMP G1 • DALLAS, TEXAS 75265 7 19 P=Q SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 logic diagrams (positive logic) SN74ALS518 P7 Q7 P6 Q6 P5 Q5 P4 Q4 17 18 15 16 13 14 11 12 19 P3 Q3 P2 Q2 P1 Q1 P0 Q0 G 8 P=Q 9 6 7 4 5 2 3 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 logic diagrams (positive logic) (continued) ′ALS520 SN74ALS521 P7 Q7 P6 Q6 P5 Q5 P4 Q4 17 18 15 16 13 14 11 12 19 P3 Q3 P2 Q2 P1 Q1 P0 Q0 G 4 8 9 6 7 4 5 2 3 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 P=Q SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: Q inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC + 0.5 V or 5.5 V, whichever is less All other inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Off-state output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Operating free-air temperature range, TA: SN74ALS518 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. recommended operating conditions SN74ALS518 MIN NOM MAX 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL VOH Low-level input voltage 0.8 High-level output voltage 5.5 V IOL TA Low-level output current 24 mA 70 °C High-level input voltage 2 Operating free-air temperature V V 0 V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK IOH VOL II Q inputs All other inputs Q inputs IIH All other inputs Q inputs IIL All other inputs TEST CONDITIONS VCC = 4.5 V, VCC = 5.5 V, II = – 18 mA VOH = 5.5 V VCC = 4 4.5 5V IOL = 12 mA IOL = 24 mA 5V VCC = 5 5.5 VI = 5.5 V VI = 7 V VCC = 5 5.5 5V V, VI = 2 2.7 7V VCC = 5 5.5 5V V, ICC VCC = 5.5 V, ‡ All typical values are at VCC = 5 V, TA = 25°C. NOTE 1: ICC is measured with G grounded, and P and Q at 4.5 V. POST OFFICE BOX 655303 SN74ALS518 TYP‡ MAX MIN – 1.5 0.1 0.25 0.4 0.35 0.5 0.1 0.1 See Note 1 • DALLAS, TEXAS 75265 mA V mA mA 20 µA – 0.1 11 V – 0.2 – 0.6 VI = 0 0.4 4V UNIT 17 mA mA 5 SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 680 Ω, TA = MIN to MAX† SN74ALS518 TO (OUTPUT) tPLH tPHL P or Q P=Q tPLH tPHL G P=Q MIN MAX 15 33 3 15 15 33 3 15 UNIT ns ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI: Q inputs of ′ALS520 . . . . . . . . . . . . . . . . . . . . . . . . . VCC + 0.5 V or 5.5 V, whichever is less All other inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Operating free-air temperature range, TA: SN54ALS520 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74ALS520, SN74ALS521 . . . . . . . . . . . . . . . . . . . . 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. recommended operating conditions SN74ALS520 SN74ALS521 SN54ALS520 UNIT MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 VCC VIH Supply voltage VIL IOH Low-level input voltage 0.7 0.8 High-level output current –1 – 2.6 mA IOL TA Low-level output current 12 24 mA 70 °C 6 High-level input voltage 2 Operating free-air temperature – 55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2 125 0 V V V SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER MIN VIK VOH VOL II IIH IIL ′ALS520 Q inputs All other inputs ′ALS520 Q inputs All other inputs ′ALS520 Q inputs All other inputs IO‡ ICC ′ALS520 SN74ALS521 VCC = 4.5 V, VCC = 4.5 V to 5.5 V, II = – 18 mA IOH = – 0.4 mA VCC = 4 4.5 5V IOH = – 1 mA IOH = – 2.6 mA VCC = 4 4.5 5V IOL = 12 mA IOL = 24 mA VCC = 5 5.5 5V VI = 5.5 V VI = 7 V VCC = 5 5.5 5V V, VI = 2 2.7 7V 5V VCC = 5 5.5 V, 4V VI = 0 0.4 VCC = 5.5 V, VO = 2.25 V VCC = 5 5.5 5V V, SN74ALS520 SN74ALS521 SN54ALS520 TEST CONDITIONS TYP† MAX MIN TYP† – 1.5 VCC – 2 2.4 – 1.5 V VCC – 2 V 3.3 2.4 0.25 – 20 See Note 1 UNIT MAX 0.4 3.2 0.25 0.4 0.35 0.5 V 0.1 0.1 0.1 0.1 – 0.2 – 0.2 mA 20 20 µA – 0.6 – 0.6 – 0.1 – 0.1 –112 – 30 –112 12 19 12 19 12 19 12 19 mA mA mA mA † All typical values are at VCC = 5 V, TA = 25°C. ‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. NOTE 1: ICC is measured with G grounded, and P and Q at 4.5 V. switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL P or Q P=Q tPLH tPHL G P=Q VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX§ SN74ALS520 SN54ALS520 SN74ALS521 MIN MAX MIN MAX 3 19 3 12 3 25 5 20 2 18 2 12 5 23 5 22 UNIT ns ns § For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 PARAMETER MEASUREMENT INFORMATION SERIES 54ALS/74ALS AND 54AS/74AS DEVICES 7V RL = R1 = R2 VCC S1 RL R1 Test Point From Output Under Test CL (see Note A) From Output Under Test RL Test Point From Output Under Test CL (see Note A) CL (see Note A) LOAD CIRCUIT FOR BI-STATE TOTEM-POLE OUTPUTS LOAD CIRCUIT FOR OPEN-COLLECTOR OUTPUTS 3.5 V Timing Input Test Point LOAD CIRCUIT FOR 3-STATE OUTPUTS 3.5 V High-Level Pulse 1.3 V R2 1.3 V 1.3 V 0.3 V 0.3 V tsu Data Input tw th 3.5 V 1.3 V 3.5 V Low-Level Pulse 1.3 V 0.3 V 1.3 V 0.3 V VOLTAGE WAVEFORMS SETUP AND HOLD TIMES VOLTAGE WAVEFORMS PULSE DURATIONS 3.5 V Output Control (low-level enabling) 1.3 V 1.3 V 0.3 V tPZL Waveform 1 S1 Closed (see Note B) tPLZ [3.5 V 1.3 V tPHZ tPZH Waveform 2 S1 Open (see Note B) 1.3 V VOL 0.3 V VOH 1.3 V 0.3 V [0 V 3.5 V 1.3 V Input 1.3 V 0.3 V tPHL tPLH VOH In-Phase Output 1.3 V 1.3 V VOL tPLH tPHL VOH Out-of-Phase Output (see Note C) 1.3 V 1.3 V VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES, 3-STATE OUTPUTS NOTES: A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. C. When measuring propagation delay items of 3-state outputs, switch S1 is open. D. All input pulses have the following characteristics: PRR ≤ 1 MHz, tr = tf = 2 ns, duty cycle = 50%. E. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuits and Voltage Waveforms 8 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. 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INCLUSION OF TI PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER’S RISK. In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. TI assumes no liability for applications assistance or customer product design. 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