SN54BCT544, SN74BCT544 OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993 • • • • • SN54BCT544 . . . JT OR W PACKAGE SN74BCT544 . . . DW OR NT PACKAGE (TOP VIEW) State-of-the-Art BiCMOS Design Significantly Reduces ICCZ ESD Protection Exceeds 2000 V Per MIL-STD-883C, Method 3015 Power-Up High-Impedance State 3-State Inverting Outputs Back-to-Back Registers for Storage Package Options Include Plastic Small-Outline (DW) Packages, Ceramic Chip Carriers (FK) and Flatpacks (W), and Plastic and Ceramic 300-mil DIPs (JT, NT) LEBA OEBA A1 A2 A3 A4 A5 A6 A7 A8 CEAB GND description The ′BCT544 octal registered 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. 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 A1 OEBA LEBA NC VCC SN54BCT544 . . . FK PACKAGE (TOP VIEW) The A-to-B enable (CEAB) input must be low in order to enter data from A or to output data from B. If CEAB is low and LEAB is low, the A-to-B latches are 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 inverted 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. 5 4 3 2 1 28 27 26 25 6 24 7 23 8 22 9 21 10 20 11 19 12 13 14 15 16 17 18 B2 B3 B4 NC B5 B6 B7 A8 CEAB GND NC OEAB LEAB B8 A2 A3 A4 NC A5 A6 A7 CEBA B1 • The SN54BCT544 is characterized for operation over the full military temperature range of – 55°C to 125°C. The SN74BCT544 is characterized for operation from 0°C to 70°C. NC – No internal connection FUNCTION TABLE† INPUTS CEAB LEAB H L OUTPUT B OEAB A X X X Z X H X Z L H L X L L L L B0‡ H L L L H L † 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 1 SN54BCT544, SN74BCT544 OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993 logic symbol† 2 1EN3 OEBA 23 G1 CEBA 1 1C5 LEBA 13 2EN4 OEAB 11 G2 CEAB 14 2C6 LEAB A1 A2 A3 A4 A5 A6 A7 A8 3 5D 3 6D 4 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 Pin numbers shown are for the DW, JT, NT, and W packages. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 22 B1 SN54BCT544, SN74BCT544 OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 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: Control inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V I/O ports (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . . . – 0.5 V to 7 V Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC Input clamp current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 30 mA Current into any output in the low state: SN54BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA SN74BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA Operating free-air temperature range: SN54BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C SN74BCT544 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 negative voltage rating may be exceeded if the input clamp-current rating is observed. recommended operating conditions SN54BCT544 SN74BCT544 MIN NOM MAX MIN NOM MAX 4.5 5 5.5 4.5 5 5.5 UNIT VCC VIH Supply voltage VIL IIK Low-level input voltage 0.8 0.8 V Input clamp current –18 –18 mA IOH IOL High-level output current –12 –15 mA Low-level output current 48 64 mA TA Operating free-air temperature 70 °C High-level input voltage 2 – 55 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2 125 0 V V 3 SN54BCT544, SN74BCT544 OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VIK VOH VCC = 4.5 V, VCC = 4.5 V VOL VCC = 4 4.5 5V II IIH‡ IIL‡ VCC = 5.5 V, VCC = 5.5 V, ICCL ICCZ Ci MIN II = –18 mA IOH = – 3 mA 2.4 3.3 2 3.2 IOH = – 3 mA IOL = 48 mA –1.2 2.4 3.3 2 3.1 UNIT V V 2.7 0.38 IOL = 64 mA VI = 5.5 V 0.55 0.42 VI = 2.7 V VI = 0.5 V VCC = 5.5 V, VCC = 5.5 V, SN74BCT544 TYP† MAX MIN –1.2 IOH = –12 mA IOH = –15 mA VCC = 4.75 V, IOS§ ICCH SN54BCT544 TYP† MAX TEST CONDITIONS –100 VCC = 5.5 V VCC = 5.5 V V 0.4 0.4 mA 20 20 µA – 0.6 VO = 0 0.55 – 225 –100 – 0.6 mA – 225 mA 7 11 7 11 mA 43 68 43 68 mA 9 15 9 15 mA VCC = 5.5 V VCC = 5 V, VI = 2.5 V or 0.5 V 6 VCC = 5 V, VO = 2.5 V or 0.5 V 16 † 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 tested at a time, and the duration of the test should not exceed one second. Cio 6 pF 16 pF timing requirements over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) VCC = 5 V, TA = 25°C MIN MAX SN54BCT544 MIN MAX SN74BCT544 MIN UNIT MAX tw tsu Pulse duration, LEAB or LEBA low 7 8 7 ns Setup time, data before LEAB or LEBA↑ High or low 5 5.5 5 ns th Hold time, data after LEAB or LEBA↑ High or low 1 1 1 ns 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN54BCT544, SN74BCT544 OCTAL REGISTERED TRANSCEIVERS WITH 3-STATE OUTPUTS SCBS039B – NOVEMBER 1988 – REVISED NOVEMBER 1993 switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF, RL = 500 Ω (unless otherwise noted) (see Note 2) 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 PARAMETER VCC = 5 V, TA = 25°C SN54BCT544 SN74BCT544 MIN MAX MIN MAX MIN MAX 2.4 7.6 2.4 10.3 2.4 9.7 3 7.6 3 8.9 3 8.5 3.5 10.3 3.5 14.2 3.5 13.3 4.8 10.2 4.8 12.7 4.8 12.3 3.5 10.3 3.5 14.4 3.5 13.4 4.8 10.3 4.8 12.8 4.8 12.4 3 10.1 3 13.1 3 12.7 5.1 11.8 5.1 14.2 5.1 13.9 2.8 7.5 2 8.9 2.8 8.5 2.3 7.2 2.3 9 2.3 8.2 UNIT ns ns ns ns ns NOTE 2: Load circuits and voltage waveforms are shown in Section 1. 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