OCTAL BUS TRANSCEIVERS

www.DataSheet4U.com SN54HCT623, SN74HCT623 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS016C – MARCH 1984 – REVISED MARCH 2003 D D D D D Operating Voltage Range of 4.5 V to 5.5 V Low Power Consumption, 80-µA Max ICC Typical tpd = 11 ns ±6-mA Output Drive at 5 V Low Input Current of 1 µA Max SN54HCT623 . . . J OR W PACKAGE SN74HCT623 . . . DW OR N PACKAGE (TOP VIEW) D D D D Inputs Are TTL-Voltage Compatible Lock Bus-Latch Capability True Logic High-Current 3-State Outputs Can Drive Up To 15 LSTTL Loads SN54HCT623 . . . FK PACKAGE (TOP VIEW) A2 A1 OEAB VCC 10 11 description/ordering information These octal bus transceivers are designed for asynchronous two-way communication between data buses. The control-function implementation allows for maximum flexibility in timing. The ’HCT623 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 (OEAB and OEBA) inputs. The output-enable inputs disable the device so that the buses are effectively isolated. The dual-enable configuration gives the transceivers the capability to store data by simultaneously enabling OEAB and OEBA. Each output reinforces its input in this transceiver configuration. When both OEAB and OEBA are enabled and all other data sources to the two sets of bus lines are in the high-impedance state, both sets of bus lines (16 total) remain at their last states. The 8-bit codes appearing on the two sets of buses are identical. To ensure the high-impedance state during power up or power down, OEBA should be tied to VCC through a pullup resistor and OEAB should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sinking/current-sourcing capability of the driver. ORDERING INFORMATION TA –40°C to 85°C 40°C PDIP – N SOIC – DW CDIP – J –55°C to 125°C CFP – W LCCC – FK PACKAGE† Tube Tube Tube Tube Tube ORDERABLE PART NUMBER SN74HCT623N SN74HCT623DW SNJ54HCT623J SNJ54HCT623W SNJ54HCT623FK TOP-SIDE MARKING SN74HCT623N HCT623 SNJ54HCT623J SNJ54HCT623W SNJ54HCT623FK † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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. Copyright  2003, 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 • DALLAS, TEXAS 75265 A8 GND B8 B7 B6 OEAB A1 A2 A3 A4 A5 A6 A7 A8 GND 1 2 3 4 5 6 7 8 9 20 19 18 17 16 15 14 13 12 VCC OEBA B1 B2 B3 B4 B5 B6 B7 B8 A3 A4 A5 A6 A7 4 5 6 7 8 3 2 1 20 19 18 17 16 15 14 9 10 11 12 13 OEBA B1 B2 B3 B4 B5 1 www.DataSheet4U.com SN54HCT623, SN74HCT623 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS FUNCTION TABLE INPUTS OEBA L H H L OEAB L H L H OPERATION B data to A bus A data to B bus Isolation B data to A bus, A data to B bus SCLS016C – MARCH 1984 – REVISED MARCH 2003 logic diagram (positive logic) OEBA OEAB 19 1 A1 2 18 B1 To Seven Other Transceivers absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/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 package thermal impedance is calculated in accordance with JESD 51-7. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 www.DataSheet4U.com SN54HCT623, SN74HCT623 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS016C – MARCH 1984 – REVISED MARCH 2003 recommended operating conditions (see Note 3) SN54HCT623 MIN VCC VIH VIL VI VO tt Supply voltage High-level input voltage Low-level input voltage Input voltage Output voltage Input transition (rise and fall) time VCC = 4.5 V to 5.5 V VCC = 4.5 V to 5.5 V 4.5 2 0.8 0 0 VCC VCC 500 0 0 NOM 5 MAX 5.5 SN74HCT623 MIN 4.5 2 0.8 VCC VCC 500 NOM 5 MAX 5.5 UNIT V V V V V ns TA Operating free-air temperature –55 125 –40 85 °C NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER VOH VOL II IOZ ICC ∆ICC† Ci OEAB or OEBA OEAB or OEBA A or B TEST CONDITIONS VI = VIH or VIL VI = VIH or VIL VI = VCC or 0 VO = VCC or GND VI = VCC or 0, IOH = –20 µA IOH = –6 mA IOL = 20 µA IOL = 6 mA VCC 4.5 45V 45V 4.5 5.5 V 5.5 V 5.5 V 5.5 V 4.5 V to 5.5 V 1.4 3 MIN 4.4 3.98 TA = 25°C TYP MAX 4.499 4.3 0.001 0.17 ±0.1 ±0.01 0.1 0.26 ±100 ±0.5 8 2.4 10 SN54HCT623 MIN 4.4 3.7 0.1 0.4 ±1000 ±10 160 3 10 MAX SN74HCT623 MIN 4.4 3.84 0.1 0.33 ±1000 ±5 80 2.9 10 MAX UNIT V V nA µA µA mA pF IO = 0 One input at 0.5 V or 2.4 V, Other inputs at 0 or VCC † This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC. switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER tpd d ten tdis di ten tdis di tt FROM (INPUT) A or B TO (OUTPUT) B or A A A B B A or B VCC 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V MIN TA = 25°C TYP MAX 15 13 30 23 18 16 30 23 18 16 9 8 22 20 42 38 30 28 42 38 30 28 12 11 SN54HCT623 MIN MAX 33 30 63 57 45 42 63 57 45 42 18 16 SN74HCT623 MIN MAX 28 25 53 48 38 35 53 48 38 35 15 14 UNIT ns ns ns ns ns ns OEBA OEBA OEAB OEAB 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. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 www.DataSheet4U.com SN54HCT623, SN74HCT623 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 1) PARAMETER tpd d FROM (INPUT) A or B TO (OUTPUT) B or A A B A or B VCC 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V 4.5 V 5.5 V MIN TA = 25°C TYP MAX 18 11 36 30 36 30 17 14 38 34 59 53 59 53 42 38 SN54HCT623 MIN MAX 58 52 89 80 89 80 63 57 SN74HCT623 MIN MAX 47 42 74 67 74 67 53 48 ns ns UNIT ns SCLS016C – MARCH 1984 – REVISED MARCH 2003 OEBA ten OEAB tt operating characteristics, TA = 25°C PARAMETER Cpd Power dissipation capacitance per transceiver TEST CONDITIONS No load TYP 40 UNIT pF 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 www.DataSheet4U.com SN54HCT623, SN74HCT623 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS016C – MARCH 1984 – REVISED MARCH 2003 PARAMETER MEASUREMENT INFORMATION VCC S1 RL PARAMETER ten tPZH tPZL tPHZ tPLZ –– 50 pF or 150 pF 1 kΩ RL 1 kΩ CL 50 pF or 150 pF 50 pF S1 Open Closed Open Closed Open S2 Closed Open Closed Open Open From Output Under Test CL (see Note A) Test Point S2 tdis tpd or tt LOAD CIRCUIT Input 1.3 V 0.3 V 2.7 V 2.7 V 3V 1.3 V 0.3 V 0 V tf tr VOLTAGE WAVEFORM INPUT RISE AND FALL TIMES 3V Input 1.3 V tPLH In-Phase Output 1.3 V 10% tPHL Out-ofPhase Output 90% 1.3 V 10% tf 90% tr tPLH 1.3 V 10% 90% tr VOH VOL 1.3 V 0V tPHL 90% VOH 1.3 V 10% V OL tf Output Control (Low-Level Enabling) 3V 1.3 V tPZL 1.3 V 0V tPLZ ≈VCC 1.3 V 10% tPHZ 1.3 V 90% VOH ≈0 V VOL Output Waveform 1 (See Note B) tPZH Output Waveform 2 (See Note B) VOLTAGE WAVEFORMS PROPAGATION DELAY AND OUTPUT RISE AND FALL TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS NOTES: A. CL includes probe and test-fixture capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control. Waveform 2 is for an output wit