SN74LVC4245A OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS SCAS375D – MARCH 1994 – REVISED JUNE 1998 D D D D EPIC (Enhanced-Performance Implanted CMOS) Submicron Process 3.3-V to 5-V Bidirectional Level Shifter Latch-Up Performance Exceeds 250 mA Per JESD 17 Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages DB, DW, OR PW PACKAGE (TOP VIEW) (5 V) VCCA DIR A1 A2 A3 A4 A5 A6 A7 A8 GND GND description This 8-bit (octal) noninverting bus transceiver contains two separate supply rails; B port has VCCB, which is set at 3.3 V, and A port has VCCA, which is set at 5 V. This allows for translation from a 3.3-V to a 5-V environment, and vice versa. 1 24 2 23 3 22 4 21 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 VCCB (3.3 V) VCCB (3.3 V) OE B1 B2 B3 B4 B5 B6 B7 B8 GND The SN74LVC4245A is designed for asynchronous communication between data buses. The device transmits data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are effectively isolated. The SN74LVC4245A pinout allows the designer to switch to a normal all-3.3-V or all-5-V 20-pin ’245 device without board re-layout. The designer uses the data paths for pins 2 –11 and 14 –23 of the SN74LVC4245A to align with the conventional ’245 pinout. The SN74LVC4245A is characterized for operation from –40°C to 85°C. FUNCTION TABLE INPUTS OE DIR OPERATION L L B data to A bus L H A data to B bus H X Isolation 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. EPIC is a trademark of Texas Instruments Incorporated. Copyright 1998, 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 SN74LVC4245A OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS SCAS375D – MARCH 1994 – REVISED JUNE 1998 logic diagram (positive logic) DIR 2 22 OE A1 3 21 B1 To Seven Other Channels absolute maximum ratings over operating free-air temperature range for VCCA = 5 V (unless otherwise noted)† Supply voltage range, VCCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6.5 V Input voltage range, VI: A port (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCCA + 0.5 V Control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 6 V Output voltage range, VO: A port (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCCA + 0.5 V Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through each VCCA or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104°C/W DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°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. This value is limited to 6 V maximum. 2. The package thermal impedance is calculated in accordance with JESD 51. 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN74LVC4245A OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS SCAS375D – MARCH 1994 – REVISED JUNE 1998 absolute maximum ratings over operating free-air temperature range for VCCB = 3.3 V (unless otherwise noted)† Supply voltage range, VCCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 4.6 V Input voltage range, VI: B port (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCCB + 0.5 V Output voltage range, VO: B port (see Note 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to VCCB + 0.5 V Input clamp current, IIK (VI < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA Output clamp current, IOK (VO < 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –50 mA Continuous output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±50 mA Continuous current through VCCB or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±100 mA Package thermal impedance, θJA (see Note 2): DB package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104°C/W DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81°C/W PW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120°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: 2. The package thermal impedance is calculated in accordance with JESD 51. 3. This value is limited to 4.6 V maximum. recommended operating conditions for VCCA = 5 V (see Note 4) MIN MAX 4.5 5.5 VCCA VIH Supply voltage VIL VI Low-level input voltage Input voltage 0 VO IOH Output voltage 0 IOL TA Low-level output current High-level input voltage 2 High-level output current Operating free-air temperature –40 UNIT V V 0.8 V VCCA VCCA V V –24 mA 24 mA 85 °C NOTE 4: All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. recommended operating conditions for VCCB = 3.3 V (see Note 4) MIN MAX 2.7 3.6 VCCB VIH Supply voltage VIL VI Low-level input voltage Input voltage 0 VO Output voltage 0 High-level input voltage VCCB = 2.7 V to 3.6 V VCCB = 2.7 V to 3.6 V IOH High level output current High-level VCCB = 2.7 V VCCB = 3 V IOL Low level output current Low-level VCCB = 2.7 V VCCB = 3 V 2 UNIT V V 0.8 V VCCB VCCB V –12 12 –24 24 V mA mA TA Operating free-air temperature –40 85 °C NOTE 4: All unused inputs of the device must be held at the associated VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3 SN74LVC4245A OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS SCAS375D – MARCH 1994 – REVISED JUNE 1998 electrical characteristics over recommended operating free-air temperature range for VCCA = 5 V (unless otherwise noted) (see Note 5) PARAMETER TEST CONDITIONS IOH = –100 100 µA VOH IOH = –24 24 mA VOL IOL = 24 mA Control inputs A port ICCA ∆ICCA§ VI = VCCA or GND VO = VCCA or GND VI = VCCA or GND, One input at 3.4 V, Ci Control inputs Cio A port MIN 5.5 V 5.3 4.5 V 3.7 5.5 V 4.7 TYP† IO = 0 Other inputs at VCCA or GND VI = VCCA or GND VO = VCCA or GND MAX UNIT 4.3 V 4.5 V IOL = 100 µA II IOZ‡ VCCA 4.5 V 0.2 5.5 V 0.2 4.5 V 0.55 5.5 V 0.55 5.5 V ±1 µA 5.5 V ±5 µA V 5.5 V 80 µA 5.5 V 1.5 mA Open 5 5V 11 pF pF † All typical values are measured at VCC = 5 V, TA = 25°C. ‡ For I/O ports, the parameter IOZ includes the input leakage current. § 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 the associated VCC. NOTE 5: VCCB = 2.7 V to 3.6 V electrical characteristics over recommended operating free-air temperature range for VCCB = 3.3 V (unless otherwise noted) (see Note 6) PARAMETER TEST CONDITIONS VCCB 2.7 V to 3.6 V IOH = –100 µA VOH IOH = –12 12 mA IOH = –24 mA IOL = 100 µA VOL IOZ‡ ICCB B port ∆ICCB§ Cio B port 2.7 V VCC–0.2 2.2 3V 2.4 3V 2 2.7 V to 3.6 V IOL = 12 mA IOL = 24 mA VO = VCCB or GND VI = VCCB or GND, IO = 0 One input at VCCB – 0.6 V, Other inputs at VCCB or GND MIN TYP¶ MAX UNIT V 0.2 2.7 V 0.4 3V 0.55 V 3.6 V ±5 µA 3.6 V 50 µA 2.7 V to 3.6 V 0.5 mA VO = VCCB or GND 3.3 V 11 pF ‡ For I/O ports, the parameter IOZ includes the input leakage current. § 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 the associated VCC. ¶ All typical values are measured at VCC = 3.3 V, TA = 25°C. NOTE 6: VCCA = 5 V ± 0.5 V 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN74LVC4245A OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS SCAS375D – MARCH 1994 – REVISED JUNE 1998 switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figures 1 and 2) FROM (INPUT) TO (OUTPUT) tPHL tPLH A B tPHL tPLH B A tPZL tPZH OE A tPZL tPZH OE B tPLZ tPHZ OE A tPLZ tPHZ OE B PARAMETER VCCA = 5 V ± 0.5 V, VCCB = 2.7 V TO 3.6 V MIN MAX 1 6.3 1 6.7 1 6.1 1 5 1 9 1 8.1 1 8.8 1 9.8 1 7 1 5.8 1 7.7 1 7.8 UNIT ns ns ns ns ns ns operating characteristics, VCCA = 5 V, VCCB = 3.3 V, TA = 25°C PARAMETER Cpd d Power dissipation capacitance per transceiver POST OFFICE BOX 655303 TEST CONDITIONS Outputs enabled Outputs disabled • DALLAS, TEXAS 75265 CL = 0, 0 f = 10 MHz TYP 39.5 5 UNIT pF 5 SN74LVC4245A OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS SCAS375D – MARCH 1994 – REVISED JUNE 1998 PARAMETER MEASUREMENT INFORMATION (A PORT) 2 × VCC 500 Ω From Output Under Test S1 Open GND CL = 50 pF (see Note A) 500 Ω TEST S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 2 × VCC GND LOAD CIRCUIT tw VCC Input 1.5 V 1.5 V 0V VOLTAGE WAVEFORMS PULSE DURATION 1.5 V 1.5 V 0V tPHL tPLH VOH Output 50% VCC 1.5 V 1.5 V 0V tPZL VCC Input 3V Output Control 50% VCC VOL VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NONINVERTING OUTPUTS Output Waveform 1 S1 at 2 × VCC (see Note B) Output Waveform 2 S1 at GND (see Note B) tPLZ 50% VCC tPZH 50% VCC VCC VOL + 0.3 V VOL tPHZ VOH – 0.3 V VOH ≈0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING NOTES: A. CL includes probe and jig 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 with internal conditions such that the output is high except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time with one transition per measurement. Figure 1. Load Circuit and Voltage Waveforms 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 SN74LVC4245A OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS SCAS375D – MARCH 1994 – REVISED JUNE 1998 PARAMETER MEASUREMENT INFORMATION (B PORT) 7V 500 Ω From Output Under Test S1 Open GND CL = 50 pF (see Note A) 500 Ω TEST S1 tPLH/tPHL tPLZ/tPZL tPHZ/tPZH Open 7V GND LOAD CIRCUIT tw 3V Input 1.5 V 1.5 V 0V VOLTAGE WAVEFORMS PULSE DURATION 1.5 V 1.5 V 0V 1.5 V tPLZ 1.5 V tPZH VOH Output 1.5 V 0V Output Waveform 1 S1 at 7 V (see Note B) tPHL tPLH 1.5 V tPZL 3V Input 3V Output Control 1.5 V VOL Output Waveform 2 S1 at GND (see Note B) VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES NONINVERTING OUTPUTS 3.5 V VOL + 0.3 V VOL tPHZ 1.5 V VOH – 0.3 V VOH ≈0V VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING NOTES: A. CL includes probe and jig 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 with internal conditions such that the output is high except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns. D. The outputs are measured one at a time with one transition per measurement. Figure 2. Load Circuit and Voltage Waveforms POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 7 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. 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