SN54F243, SN74F243 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS086 – MARCH 1987 – REVISED OCTOBER 1993 • • • • SN54F243 . . . J PACKAGE SN74F243 . . . D OR N PACKAGE (TOP VIEW) Asynchronous Communication Between Data Buses Local Bus-Latch Capability True 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 SN54F243 . . . 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 identical for the ′F243. 4 NC – No internal connection The SN54F243 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74F243 is characterized for operation from 0°C to 70°C. 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 SN54F243, SN74F243 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS086 – 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 SN54F243, SN74F243 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS086 – 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: SN54F243 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA SN74F243 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range: SN54F243 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74F243 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed. recommended operating conditions SN54F243 SN74F243 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 SN54F243, SN74F243 QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS086 – 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 SN74F243 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 SN54F243 TYP† MAX TEST CONDITIONS 1 1 0.1 0.1 70 70 20 20 –1 – 100 0.55 – 225 – 100 V mA µA – 1.6 mA – 225 mA Outputs high 64 80 64 80 Outputs low 64 90 64 90 Outputs disabled 71 90 71 90 mA † All typical values are at VCC = 5 V, TA = 25°C. ‡ 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 Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX¶ ′F243 tPLH tPHL A or B B or A tPZH tPZL Enable A or B tPHZ tPLZ Disable A or B SN54F243 SN74F243 MIN TYP MAX MIN MAX MIN MAX 1.7 3.6 5.2 1.2 6.5 1.2 6.2 1.7 3.6 5.2 1.2 8.5 1.2 6.5 1.2 3.9 5.7 1.2 8 1.2 6.7 1.2 5.4 7.5 1.2 10.5 1.2 8.5 1.2 4.1 6 1 7.5 1 7 2 4.5 6 2 8.5 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. 2–4 POST OFFICE BOX 655303 UNIT • 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. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements. CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. 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