SN54F242, SN74F242 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS062A - D2932, MARCH 1987 - REVISED OCTOBER 1993 * * * * SN54F242 . . . J PACKAGE SN74F242 . . . D OR N PACKAGE (TOP VIEW) Asynchronous Communication Between Data Buses Local Bus-Latch Capability Inverting Logic Package Options Include Plastic Small-Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs OEAB NC A1 A2 A3 A4 GND description These quadruple bus transceivers are designed for asynchronous communications 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 output-enable (OEBA and OEAB) inputs. The output-enable inputs can be used to disable the device so that the buses are effectively isolated. 1 14 2 13 3 12 4 11 5 10 6 9 7 8 VCC OEBA NC B1 B2 B3 B4 NC OEAB NC VCC OEBA SN54F242 . . . FK PACKAGE (TOP VIEW) A1 NC A2 NC A3 3 2 1 20 19 18 5 17 6 16 7 15 8 14 9 10 11 12 13 NC NC B1 NC B2 A4 GND NC B4 B3 The dual-enable configuration gives the quadruple bus transceivers the capability to store data by simultaneous enabling of OEBA and OEAB. 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 (eight in all) remain at their states. The 4-bit codes appearing on the two sets of buses will be complementary for the F242. 4 NC - No internal connection The SN54F242 is characterized for operation over the full military temperature range of - 55C to 125C. The SN74F242 is characterized for operation from 0C to 70C. FUNCTION TABLE INPUTS FUNCTION OEAB OEBA L L H H B to A H L Isolation L H Latch A and B (A = B) A to B Copyright 1993, 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 2-1 SN54F242, SN74F242 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS062A - D2932, MARCH 1987 - REVISED OCTOBER 1993 logic symbol OEBA 13 EN1 1 EN2 OEAB A1 A2 A3 A4 3 11 1 2 4 10 5 9 8 6 B1 B2 B3 B4 This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) OEAB A1 A2 A3 A4 1 13 3 11 4 10 5 9 6 8 Pin numbers shown are for the D, J, and N packages. 2-2 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 OEBA B1 B2 B3 B4 SN54F242, SN74F242 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS062A - D2932, MARCH 1987 - REVISED OCTOBER 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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 1.2 V to 7 V Input current range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 30 mA to 5 mA Voltage range applied to any output in the disabled or power-off state . . . . . . . . . . . . . . . . . . . - 0.5 V to 5.5 V Voltage range applied to any output in the high state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 0.5 V to VCC Current into any output in the low state: SN54F242 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA SN74F242 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range: SN54F242 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 55C to 125C SN74F242 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0C to 70C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . - 65C to 150C 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 voltage ratings may be exceeded provided the input current ratings are observed. recommended operating conditions SN54F242 SN74F242 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 VCC VIH Supply voltage VIL IIK Low-level input voltage Input clamp current IOH IOL High-level output current Low-level output current 48 TA Operating free-air temperature High-level input voltage 2 2 0.8 - 55 POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 UNIT V V 0.8 V - 18 - 18 mA - 12 - 15 mA 64 mA 70 C 125 0 2-3 SN54F242, SN74F242 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS062A - D2932, MARCH 1987 - REVISED OCTOBER 1993 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VCC = 4.5 V, VCC = 4.5 V VOH VCC = 4.75 V, VOL VCC = 4 4.5 5V A or B port II Control inputs A or B port IIH Control inputs IIL IOS 5V VCC = 5 5.5 MIN II = - 18 mA IOH = - 3 mA 2.4 3.3 2 3.2 IOH = - 3 mA IOL = 48 mA VI = 0.5 V VO = 0 3.3 2 3.1 V V 0.55 0.42 VI = 7 V VCC = 5.5 V, VCC = 5.5 V, - 1.2 2.4 UNIT 2.7 0.38 IOL = 64 mA VI = 5.5 V VI = 2 2.7 7V SN74F242 TYP MAX MIN - 1.2 IOH = - 12 mA IOH = - 15 mA VCC = 5 5.5 5V V, 55V VCC = 5.5 V, See Note 2 ICC SN54F242 TYP MAX TEST CONDITIONS 0.55 1 1 0.1 0.1 70 70 20 20 -1 - 100 - 225 - 100 V mA A -1 mA - 225 mA Outputs high 30 46 30 46 Outputs low 46 69 46 69 Outputs disabled 42 63 42 63 mA All typical values are at VCC = 5 V, TA = 25C. For I/O ports, the parameters IIH and IIL include the off-state output current. Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. NOTE 2: ICC is measured either with all transceivers enabled in only one direction or all transceivers disabled. switching characteristics (see Note 3) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, CL = 50 pF, RL = 500 , TA = 25C VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 , TA = MIN to MAX F242 SN54F242 UNIT SN74F242 MIN TYP MAX MIN MAX MIN MAX 2.2 4.1 6.5 2.2 9 2.2 7.5 1 2.6 4.5 0.5 5 1 4.5 2.7 5.6 7.5 2.2 10 2.7 8.5 2.7 6.1 9 2.2 12 2.7 10.5 1.8 6.6 9 1.8 11 1.8 9.5 tPLZ 2.7 5.6 9.5 2.3 13.5 2.7 For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 3: Load circuits and waveforms are shown in Section 1. 11 tPLH tPHL tPZL tPZH tPHZ 2-4 A or B B or A Enable A or B Disable A or B POST OFFICE BOX 655303 * DALLAS, TEXAS 75265 ns ns ns 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. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. 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