16-BIT BUS TRANSCEIVERS

www.DataSheet4U.com 54AC16620, 74AC16620 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS239A – JULY 1990 – REVISED APRIL 1996 D D D D D D D Members of the Texas Instruments Widebus ™ Family 3-State Outputs Drive Bus Lines Directly Flow-Through Architecture Optimizes PCB Layout Distributed VCC and GND Pin 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 300-mil Shrink Small-Outline (DL) Packages Using 25-mil Center-to-Center Pin Spacings and 380-mil Fine-Pitch Ceramic Flat (WD) Packages Using 25-mil Center-to-Center Pin Spacings 54AC16620 . . . WD PACKAGE 74AC16620 . . . DL PACKAGE (TOP VIEW) description The ’AC16620 are inverting 16-bit transceivers designed for asynchronous communication between data buses. The control-function implementation allows for maximum flexibility in timing. These devices can be used as two 8-bit transceivers or one 16-bit transceiver. They allow data transmission from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the complementary output-enable (OEAB or OEBA) inputs. The output-enable inputs can be used to disable the device so that the buses are effectively isolated. 1OEAB 1B1 1B2 GND 1B3 1B4 VCC 1B5 1B6 GND 1B7 1B8 2B1 2B2 GND 2B3 2B4 VCC 2B5 2B6 GND 2B7 2B8 2OEAB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1OEBA 1A1 1A2 GND 1A3 1A4 VCC 1A5 1A6 GND 1A7 1A8 2A1 2A2 GND 2A3 2A4 VCC 2A5 2A6 GND 2A7 2A8 2OEBA The dual-enable configuration gives the transceiver the capability to store data by simultaneously enabling OEAB and OEBA. 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, the bus lines remain at their last states. The 74AC16620 is packaged in TI’s shrink small-outline package, which provides twice the I/O pin count and functionality of standard small-outline packages in the same printed-circuit-board area. The 54AC16620 is characterized for operation over the full military temperature range of –55°C to 125°C. The 74AC16620 is characterized for operation from –40°C to 85°C. 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. EPIC and Widebus are trademarks of 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 Copyright © 1996, Texas Instruments Incorporated • DALLAS, TEXAS 75265 1 54AC16620, 74AC16620 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS239A – JULY 1990 – REVISED APRIL 1996 FUNCTION TABLE (each 8-bit section) INPUTS OEBA L L H H OEAB L H L H OPERATION B data to A bus B data to A bus, A data to B bus Isolation A data to B bus logic symbol† 1OEBA 1OEAB 2OEBA 2OEAB 1A1 48 1 25 24 47 EN1 EN2 EN3 EN4 1 1 1 1A2 1A3 1A4 1A5 1A6 1A7 1A8 2A1 46 44 43 41 40 38 37 36 3 1 1 2A2 2A3 2A4 2A5 2A6 2A7 2A8 35 33 32 30 29 27 26 4 14 16 17 19 20 22 23 2B2 2B3 2B4 2B5 2B6 2B7 2B8 2 3 5 6 8 9 11 12 13 1B2 1B3 1B4 1B5 1B6 1B7 1B8 2B1 2 1B1 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 54AC16620, 74AC16620 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS239A – JULY 1990 – REVISED APRIL 1996 logic diagram (positive logic) 1OEBA 1OEAB 1A1 48 1 47 2OEBA 2OEAB 2A1 2 25 24 36 13 1B1 2B1 To Seven Other Channels To Seven Other Channels 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±400 mA Maximum power dissipation at TA = 55°C (in still air) (see Note 2): DL package . . . . . . . . . . . . . . . . . . . 1.2 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 54AC16620, 74AC16620 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS239A – JULY 1990 – REVISED APRIL 1996 recommended operating conditions (see Note 2) 54AC16620 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 ∆t/∆v Low-level output current Input transition rise or fall rate VCC = 4.5 V VCC = 5.5 V 0 –55 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 10 125 0 –40 0 0 NOM 5 MAX 5.5 74AC16620 MIN 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 TA Operating free-air temperature NOTE 3: Unused inputs must be held high or low to prevent them from floating. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC 3V IOH = –50 µA VOH IOH = –4 mA IOH = –24 mA 24 IOH = –75 mA† IOL = 50 µA VOL IOL = 12 mA IOL = 24 mA IOL = 75 mA† VI = VCC or GND VO = VCC or GND VI = VCC or GND, VI = VCC or GND VO = VCC or GND IO = 0 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 3V 4.5 V 5.5 V 3V 4.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5.5 V 5V 5V 4.5 16 ±0.1 ±0.5 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 54AC16620 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 ±1 ±5 80 MAX 74AC16620 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 ±1 ±5 80 µA µA µA pF pF V V MAX UNIT II IOZ‡ ICC Ci Cio Control inputs A or B ports Control inputs A or B ports † 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. 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 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 54AC16620, 74AC16620 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCAS239A – JULY 1990 – REVISED APRIL 1996 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 tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ FROM (INPUT) A or B TO (OUTPUT) B or A A A B B MIN 2.7 3.9 3.2 4.5 5.3 4.6 3.1 4.4 5 4.4 TA = 25°C TYP MAX 6.1 7.9 7.1 11.1 7.4 7 6.7 9.6 7.1 6.8 8.7 10.6 10 13.5 9.5 9.2 9.5 13 9.3 8.9 54AC16620 MIN 2.7 3.9 3.2 4.5 5.3 4.6 3.1 4.4 5 4.4 MAX 9.7 11.7 11.2 15 10.2 9.8 10.7 14.5 9.8 9.4 74AC16620 MIN 2.7 3.9 3.2 4.5 5.3 4.6 3.1 4.4 5 4.4 MAX 9.7 11.7 11.2 15 10.2 9.8 10.7 14.5 9.8 9.4 UNIT ns ns ns ns ns OEBA OEBA OEAB OEAB switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER tPLH tPHL tPZH tPZL tPHZ tPLZ tPZH tPZL tPHZ tPLZ FROM (INPUT) A or B TO (OUTPUT) B or A A A B B MIN 2.1 3.1 2.2 3.3 4.9 4.1 2.2 3.4 4.6 4.1 TA = 25°C TYP MAX 3.9 4.9 4.3 5.5 6.6 5.8 4.2 5.4 6.4 5.6 6.1 7.3 6.8 8.4 8.6 7.8 6.5 8.1 8.5 7.6 54AC16620 MIN 2.1 3.1 2.2 3.3 4.9 4.1 2.2 3.4 4.6 4.1 MAX 6.8 8.2 7.6 9.4 9.2 8.3 7.3 9.1 9 8 74AC16620 MIN 2.1 3.1 2.2 3.3 4.9 4.1 2.2 3.4 4.6 4.1 MAX 6.8 8.2 7.6 9.4 9.2 8.3 7.3 9.1 9 8 UNIT ns ns ns ns ns OEBA OEBA OEAB OEAB operating characteristics, VCC = 5 V, TA = 25°C PARAMETER Cpd d Power dissipation capacitance per transceiver Outputs enabled Outputs disabled TEST CONDITIONS CL = 50 pF pF, f = 1 MHz TYP 49 6 UNIT pF PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data