SN74F543 OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS SDFS025B – D2942, MARCH 1987 – REVISED OCTOBER 1993 • • • DB, DW, OR NT PACKAGE (TOP VIEW) 3-State True Outputs Back-to-Back Registers for Storage Package Options Include Plastic Small-Outline and Shrink Small-Outline Packages and Standard Plastic 300-mil DIPs LEBA OEBA A1 A2 A3 A4 A5 A6 A7 A8 CEAB GND description The SN74F543 octal transceiver contains two sets of D-type latches for temporary storage of data flowing in either direction. Separate latch-enable (LEAB or LEBA) and output enable (OEAB or OEBA) inputs are provided for each register to permit independent control in either direction of data flow. The A outputs are characterized to sink 24 mA while the B outputs are characterized to sink 64 mA. 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCC CEBA B1 B2 B3 B4 B5 B6 B7 B8 LEAB OEAB The A-to-B enable (CEAB) input must be low in order to enter data from A or to output data from B. Having CEAB low and LEAB low makes the A-to-B latches transparent; a subsequent low-to-high transition of LEAB puts the A latches in the storage mode. With CEAB and OEAB both low, the 3-state B outputs are active and reflect the data present at the output of the A latches. Data flow from B to A is similar, but requires using the CEBA, LEBA, and OEBA inputs. The SN74F543 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area. The SN74F543 is characterized for operation from 0°C to 70°C. FUNCTION TABLE† INPUTS CEAB LEAB OEAB A OUTPUT B H X X X Z X X H X Z L H L X L L L L B0‡ L L L L H H † A-to-B data flow is shown; B-to-A flow control is the same except that it uses CEBA, LEBA, and OEBA. ‡ Output level before the indicated steady-state input conditions were established. 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 SN74F543 OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS SDFS025B – D2942, MARCH 1987 – REVISED OCTOBER 1993 logic symbol† 2 OEBA 23 CEBA 1 LEBA 13 OEAB 11 CEAB 14 LEAB A1 A2 A3 A4 A5 A6 A7 A8 1EN3 G1 1C5 2EN4 G2 2C6 3 5D 3 4 6D 4 22 21 5 20 6 19 7 18 8 17 9 16 10 15 B1 B2 B3 B4 B5 B6 B7 B8 † This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. logic diagram (positive logic) OEBA CEBA LEBA OEAB CEAB LEAB A1 2 23 1 13 11 14 C1 3 1D C1 1D To Seven Other Channels 2–2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 22 B1 SN74F543 OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS SDFS025B – D2942, 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 (excluding I/O ports) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 1.2 V to 7 V Input current range, IIK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 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: A1– A8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 mA B1– B8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 VCC VIH Supply voltage VIL IIK Low-level input voltage IOH High level output current High-level IOL Low level output current Low-level TA Operating free-air temperature High-level input voltage MIN NOM MAX 4.5 5 5.5 2 Input clamp current POST OFFICE BOX 655303 0.8 V – 18 mA –3 B1 – B8 – 15 A1 – A8 24 B1 – B8 64 • DALLAS, TEXAS 75265 V V A1 – A8 0 UNIT 70 mA mA °C 2–3 SN74F543 OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS SDFS025B – D2942, MARCH 1987 – REVISED OCTOBER 1993 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK TEST CONDITIONS VCC = 4.5 V, A1 – A8 VOH VCC = 4 4.5 5V B1 – B8 Any output VOL II IIH‡ IIL‡ IOS§ A1 – A8 B1 – B8 OE, LE, and CE A and B ports OE, LE, and CE A and B ports OE, LE, and CE A and B ports A1 – A8 B1 – B8 ICCH ICCL VCC = 4.75 V, MIN II = – 18 mA IOH = – 1 mA IOH = – 3 mA IOH = – 3 mA IOH = – 15 mA IOH = – 1 mA to – 3 mA VCC = 4 4.5 5V IOL = 24 mA IOL = 64 mA 5V VCC = 5 5.5 VI = 7 V VI = 5.5 V VCC = 5 5.5 5V V, VI = 2 2.7 7V VCC = 5 5.5 5V V, VI = 0 0.5 5V VCC = 5 5.5 5V V, VO = 0 TYP† 2.5 3.4 2.4 3.3 2.4 3.3 2 3.1 MAX UNIT – 1.2 V V 2.7 0.3 0.5 0.42 0.55 0.1 1 20 70 – 1.2 – 0.65 – 60 – 150 – 100 – 225 VCC = 5.5 V VCC = 5.5 V V mA µA mA mA 67 100 mA 83 125 mA 125 mA ICCZ VCC = 5.5 V 83 † 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. timing requirements VCC = 5 V, TA = 25°C MIN tw tsu Pulse duration Setup time, data before latch enable High or low MAX VCC = 4.5 V to 5.5 V, TA = MIN to MAX¶ MIN 5 5 ns 3 3.5 ns th Hold time, data after latch enable High or low 3 3.5 ¶ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. 2–4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 UNIT MAX ns SN74F543 OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS SDFS025B – D2942, MARCH 1987 – REVISED OCTOBER 1993 switching characteristics (see Note 2) PARAMETER FROM (INPUT) TO (OUTPUT) tPLH tPHL A or B B or A tPLH tPHL LEBA A tPLH tPHL LEAB B tPZH tPZL OE or CE A or B tPHZ tPLZ OE or CE A or B 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 † MIN TYP MAX MIN MAX 2.2 5.1 7.5 2.2 8.5 2.2 4.6 6.5 2.2 7.5 3.7 8.1 11 4.1 12.5 3.7 8.1 11 4.1 12.5 3.7 8.1 11 4.1 12.5 3.7 8.1 11 4.1 12.5 2.2 6.6 9 2.2 10 3.2 7.1 10.5 3.2 12 1.7 5.6 8 1.7 9 1.7 5.1 7.5 1.7 8.5 UNIT ns ns ns ns ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 2: Load circuits and waveforms are shown in Section 1. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2–5 SN74F543 OCTAL REGISTERED TRANSCEIVER WITH 3-STATE OUTPUTS SDFS025B – D2942, MARCH 1987 – REVISED OCTOBER 1993 2–6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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. 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