SCAS060A − D2957, JULY 1987 − REVISED APRIL 1993 • • • • • • • DW OR NT PACKAGE (TOP VIEW) Inputs Are TTL-Voltage Compatible Local Bus-Latch Capability Flow-Through Architecture to Optimize PCB Layout Center-Pin VCC and GND Configurations to Minimize High-Speed Switching Noise EPICt (Enhanced-Performance Implanted CMOS) 1-mm Process 500-mA Typical Latch-Up Immunity at 125°C Package Options Include Plastic SmallOutline 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 GAB B1 B2 B3 B4 VCC VCC B5 B6 B7 B8 GBA description These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control function implementation allows for maximum flexibility in timing. These devices allow data transmission from the A bus to the B bus or from the B bus to the A bus depending upon the logic levels at the enable inputs (GBA and GAB). The enable inputs can be used to disable the device so that the buses are effectively isolated. The dual-enable configuration gives these devices the capability to store data by simultaneous eanbling of GBA and GAB. Each output reinforces its input in this transceiver configuration. Thus, when both control inputs are enabled and all other data sources to the two sets of bus lines are at high impedance, both sets of bus lines (16 in all) will remain at their last states. The 8-bit codes appearing on the two sets of buses will be complementary for the 74ACT11620. The 74ACT11620 is characterized for operation from − 40°C to 85°C. FUNCTION TABLE ENABLE INPUTS GBA GAB L L H H H L L OPERATION B data to A bus A data to B bus Isolation B data to A bus, A data to B bus H EPIC is a trademark of Texas Instruments Incorporated. Copyright 1993, Texas Instruments Incorporated !"#$ % &'!!($ #% )'*+&#$ ,#$(!,'&$% &!" $ %)(&&#$% )(! $.( $(!"% (/#% %$!'"($% %$#,#!, 0#!!#$1- !,'&$ )!&(%%2 ,(% $ (&(%%#!+1 &+',( $(%$2 #++ )#!#"($(!%- • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77001 • 1 SCAS060A − D2957, JULY 1987 − REVISED APRIL 1993 logic symbol† GBA GAB A1 A2 A3 A4 A5 A6 A7 A8 13 24 1 2 logic diagram (positive logic) EN1 GBA EN2 23 1 2 22 3 21 4 20 9 17 10 16 11 15 12 14 GAB B1 B2 A1 B1 A2 B2 B3 B4 B5 B6 To Other Six Transceivers B7 B8 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 200 mA 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. NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2 • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77001 • SCAS060A − D2957, JULY 1987 − REVISED APRIL 1993 recommended operating conditions MIN MAX 4.5 5.5 VCC VIH Supply voltage VIL VI Low-level input voltage Input voltage 0 VO IOH Output voltage 0 IOL Dt/Dv Low-level output current TA Operating free-air temperature High-level input voltage 2 High-level output current UNIT V V 0.8 V VCC VCC V −24 mA V 24 mA 0 10 ns/V − 40 85 °C Input transition rise or fall rate electrical characteristics over recommended operating free-air temperature range PARAMETER TEST CONDITIONS VCC IOH = − 50 mA A VOH 5.4 3.8 4.94 4.8 IOH = − 75 mA† 5.5 V A or B ports‡ II GBA or GAB VI = VCC or GND VI = VCC or GND, IO = 0 DICC§ One input at 3.4 V, Other inputs at GND or VCC VI = VCC or GND 3.85 0.1 5.5 V 0.1 0.1 4.5 V 0.36 0.44 5.5 V 0.36 0.44 V 1.65 5.5 V ± 0.5 ±5 mA 5.5 V ± 0.1 ±1 mA 5.5 V 8 8 mA 5.5 V 0.9 1 mA 5V • UNIT V 0.1 4 VO = VCC or GND 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. § This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC. POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77001 • MAX 4.5 V 5.5 V ICC A or B ports 4.4 5.4 3.94 IOZ GBA or GAB 4.4 5.5 V 5.5 V IOL = 75 mA† VO = VCC or GND Co 4.5 V 4.5 V IOL = 24 mA Ci MIN IOH = − 24 mA IOL = 50 mA A VOL TA = 25°C MIN TYP MAX pF pF 3 SCAS060A − D2957, JULY 1987 − REVISED APRIL 1993 switching characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPZH tPZL GBA A tPHZ tPLZ GBA A tPZH tPZL GAB B tPHZ tPLZ GAB B MIN TA = 25°C TYP MAX 1.5 5.7 1.5 5.9 1.5 MIN MAX 8.5 1.5 9.4 7.7 1.5 8.6 7.2 9.1 1.5 10.3 1.5 7.1 9.2 1.5 10.1 1.5 7.9 9.6 1.5 10.4 1.5 8.3 10 1.5 10.9 1.5 7.5 10.2 1.5 11.3 1.5 7.7 9.8 1.5 11 1.5 7.2 8.9 1.5 9.4 1.5 7.2 8.9 1.5 9.6 UNIT ns ns ns ns ns operating characteristics, VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS Outputs enabled Cpd 4 Power dissipation capacitance per transceiver Outputs disabled • UNIT 54 CL = 50 pF, POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77001 • TYP f = 1 MHz 11 pF SCAS060A − D2957, JULY 1987 − REVISED APRIL 1993 PARAMETER MEASUREMENT INFORMATION 2 X VCC 500 Ω From Output Under Test S1 S1 OPEN 2 x VCC GND TEST tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open GND 500 Ω CL = 50 pF (see Note A) LOAD CIRCUIT 3V Input (see Note C) 1.5 V 1.5 V 0 VOH 50% 50% VOL tPLH tPHL Out-of-Phase Output 1.5 V VOH 50% 50% VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES 1.5 V 0 tPZL tPLZ tPHL tPLH In-Phase Output 3V Output Control (Low-Level Enabling) ≈ VCC Output Waveform 1 S1 at 2 x VCC (see Note B) 50% 20% VOL tPZH Output Waveform 2 S1 at GND (see Note B) tPHZ 50% 80% VOH ≈0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES 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. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time with one input transition per measurement. Figure 1. Load Circuit and Voltage Waveforms • POST OFFICE BOX 655303 DALLAS, TEXAS 75265 POST OFFICE BOX 1443 HOUSTON, TEXAS 77001 • 5 PACKAGE OPTION ADDENDUM www.ti.com 24-Jun-2005 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing 74ACT11620NT OBSOLETE PDIP NT Pins Package Eco Plan (2) Qty 24 TBD Lead/Ball Finish Call TI MSL Peak Temp (3) Call TI (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. 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