SCAS057A − JULY 1987 − REVISED APRIL 1993 • DW OR NT PACKAGE (TOP VIEW) Bidirectional Bus Transceivers in High-Density 24-Pin Packages Flow-Through Architecture Optimizes PCB Layout Center-Pin VCC and GND Configurations Minimize High-Speed Switching Noise EPIC (Enhanced-Performance Implanted CMOS) 1-µm Process 500-mA Typical Latch-Up Immunity at 125°C Package Options Include Plastic Small-Outline Packages and Standard Plastic 300-mil DIPs • • • • • A1 A2 A3 A4 GND GND GND GND A5 A6 A7 A8 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 DIR B1 B2 B3 B4 VCC VCC B5 B6 B7 B8 OE description These octal bus transceivers are designed for asynchronous communication between data buses. These devices transmit data from the A bus to the B bus or from the B bus to the A bus depending upon the level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so that the buses are effectively isolated. The 74AC11643 is characterized for operation from − 40°C to 85°C. FUNCTION TABLE INPUTS OE OPERATION DIR L L B data to A bus L H A data to B bus H X Isolation logic symbol† OE DIR 13 24 logic diagram (positive logic) OE G3 3 EN1 [BA] 3 EN2 [AB] A1 A2 A3 A4 A5 A6 A7 A8 23 1 1 2 13 1 1 2 22 3 21 4 20 9 17 10 16 11 15 12 14 DIR 24 B1 B2 A1 B3 1 23 B1 B4 B5 B6 B7 B8 To 7 Other Channels † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. EPIC is a trademark of Texas Instruments Incorporated. Copyright 1993, Texas Instruments Incorporated ! " #$%! " &$'(#! )!%* )$#!" # ! "&%##!" &% !+% !%" %," "!$%!" "!)) -!.* )$#! &#%""/ )%" ! %#%""(. #($)% !%"!/ (( &%!%"* • DALLAS, TEXAS 75265 • HOUSTON, TEXAS 77251−1443 POST OFFICE BOX 655303 POST OFFICE BOX 1443 1 SCAS057A − JULY 1987 − REVISED APRIL 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, VI (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to VCC + 0.5 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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 50 mA Continuous current through VCC or GND pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 200 mA Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −ā 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 and output voltage ratings may be exceeded if the input and output clamp-current ratings are observed. recommended operating conditions VCC VIH Supply voltage VCC = 3 V VCC = 4.5 V High-level input voltage VCC = 5.5 V VCC = 3 V VIL VI VO IOH IOL Input voltage 2 5 5.5 3.15 • • V 0.9 1.35 V 1.65 VCC VCC V V −4 −24 VCC = 5.5 V VCC = 3 V −24 VCC = 4.5 V VCC = 5.5 V 24 POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 V 3.85 0 Low-level output current Operating free-air temperature 3 UNIT 2.1 VCC = 3 V VCC = 4.5 V High-level output current TA MAX 0 Output voltage Input transition rise or fall rate NOM VCC = 4.5 V VCC = 5.5 V Low-level input voltage ∆t/∆v MIN mA 12 mA 24 0 10 ns/V −40 85 °C SCAS057A − JULY 1987 − REVISED APRIL 1993 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = − 50 µA IOH = − 4 mA VOH ICC Ci TA = 25°C TYP MAX MIN 3V 2.9 2.9 4.5 V 4.4 4.4 5.5 V 5.4 5.4 3V 2.58 2.48 3.94 3.8 IOH = − 24 mA 5.5 V 4.94 4.8 IOH = − 75 mA† 5.5 V IOL = 12 mA IOL = 24 mA II IOZ‡ MIN 4.5 V IOL = 50 µA VOL VCC MAX UNIT V 3.85 3V 0.1 0.1 4.5 V 0.1 0.1 5.5 V 0.1 0.1 3V 0.36 0.44 4.5 V 0.36 0.44 5.5 V 0.36 0.44 V IOL = 75 mA† VI = VCC or GND 5.5 V 5.5 V ± 0.1 ±1 µA A or B ports VO = VCC or GND VI = VCC or GND, 5.5 V ± 0.5 ±5 µA 8 80 µA OE or DIR VI = VCC or GND VO = VCC or GND OE or DIR IO = 0 1.65 5.5 V 5V 4 pF Cio A or B ports 5V 12 † Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms. ‡ For I/O ports, the parameter IOZ includes the input leakage current. pF switching characteristics over recommended operating free-air temperature range, VCC = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPZH tPZL OE A or B tPHZ tPLZ OE A or B • TA = 25°C MIN TYP MAX MAX 1.5 7.4 10.1 1.5 11.3 1.5 6.6 8.7 1.5 10 1.5 9.4 11.8 1.5 13.3 1.5 8.9 11.4 1.5 13 1.5 8.3 10.1 1.5 10.9 1.5 8.9 10.9 1.5 12 POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443 • MIN UNIT ns ns ns 3 SCAS057A − JULY 1987 − REVISED APRIL 1993 switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPZH tPZL OE A or B tPHZ tPLZ OE A or B MIN TA = 25°C TYP MAX MIN MAX 1.5 5.4 7.7 1.5 8.6 1.5 5 6.8 1.5 7.9 1.5 7 9.2 1.5 10.4 1.5 6.6 8.7 1.5 10 1.5 7.1 8.8 1.5 9.4 1.5 7.2 9 1.5 9.8 UNIT ns ns ns operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS TYP Outputs enabled Cpd Power dissipation capacitance per transceiver Outputs disabled UNIT 46 CL = 50 pF, f = 1 MHz 9 pF PARAMETER MEASUREMENT INFORMATION 2 × VCC S1 500 Ω From Output Under Test TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open GND CL = 50 pF (see Note A) 500 Ω VCC Output Control (low-level enabling) LOAD CIRCUIT FOR OUTPUTS 50% VCC 50% 0V tPLH Output (see Note D) tPHL Output Waveform 2 S1 at GND (see Note C) VOH 50% VCC VOL 50% VCC VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES tPLZ ≈ VCC Output Waveform 1 S1 at 2 × VCC (see Note C) 50% 50% 0V tPZL Input (see Note B) S1 Open 2 × VCC GND 50% VCC tPZH 20% VCC VOL tPHZ VOH 50% VCC 80% VCC 0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES NOTES: A. CL includes probe and jig capacitance. B. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, Zo = 50 Ω, tr ≤ 3 ns, tf ≤ 3 ns. For testing pulse duration: tr = tf = 1 to 3 ns. Pulse polarity can be either high-to-low-to-high or low-to-high-to-low. C. 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. D. The outputs are measured one at a time with one transition per measurement. Figure 1. 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