SCLS382O September   1997  – September 2014 SN74LV245A

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Simplified Schematic
  5. 5 Revision History
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  Handling Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics
    6. 7.6  Switching Characteristics, VCC = 2.5 V ± 0.2 V
    7. 7.7  Switching Characteristics, VCC = 3.3 V ± 0.3 V
    8. 7.8  Switching Characteristics, VCC = 5 V ± 0.5 V
    9. 7.9  Noise Characteristics
    10. 7.10 Operating Characteristics
    11. 7.11 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Related Links
    2. 13.2 Trademarks
    3. 13.3 Electrostatic Discharge Caution
    4. 13.4 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DGV|20
  • DB|20
  • NS|20
  • DW|20
  • PW|20
  • RGY|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)(1)
MIN MAX UNIT
VCC Supply voltage range –0.5 7 V
VI Input voltage range Except I/O ports(2) –0.5 7 V
I/O ports(2)(3) –0.5 7
VO Voltage range applied to any output in the high-impedance or power-off state(2) –0.5 7 V
VO Output voltage range applied in the high or low state(2)(3) –0.5 VCC + 0.5 V
IIK Input clamp current VI < 0 –20 mA
IOK Output clamp current VO < 0 –50 mA
IO Continuous output current VO = 0 to VCC ±35 mA
Continuous current through VCC or GND ±70 mA
(1) 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.
(2) The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed.
(3) This value is limited to 5.5-V maximum.

7.2 Handling Ratings

MIN MAX UNIT
Tstg Storage temperature range –65 150 °C
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) 0 2000 V
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) 0 1000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

7.3 Recommended Operating Conditions

over operating free-air temperature range (unless otherwise noted)(1)
SN54LV245A(2) SN74LV245A UNIT
MIN MAX MIN MAX
VCC Supply voltage 2 5.5 2 5.5 V
VIH High-level input voltage VCC = 2 V 1.5 1.5 V
VCC = 2.3 V to 2.7 V VCC × 0.7 VCC × 0.7
VCC = 3 V to 3.6 V VCC × 0.7 VCC × 0.7
VCC = 4.5 V to 5.5 V VCC × 0.7 VCC × 0.7
VIL Low-level input voltage VCC = 2 V 0.5 0.5 V
VCC = 2.3 V to 2.7 V VCC × 0.3 VCC × 0.3
VCC = 3 V to 3.6 V VCC × 0.3 VCC × 0.3
VCC = 4.5 V to 5.5 V VCC × 0.3 VCC × 0.3
VI Input voltage 0 5.5 0 5.5 V
VO Output voltage High or low state 0 VCC 0 VCC V
3-state 0 5.5 0 5.5
IOH High-level output current VCC = 2 V –50 –50 µA
VCC = 2.3 V to 2.7 V –2 –2 mA
VCC = 3 V to 3.6 V –8 –8
VCC = 4.5 V to 5.5 V –16 –16
IOL Low-level output current VCC = 2 V 50 50 µA
VCC = 2.3 V to 2.7 V 2 2 mA
VCC = 3 V to 3.6 V 8 8
VCC = 4.5 V to 5.5 V 16 16
Δt/Δv Input transition rise or fall rate VCC = 2.3 V to 2.7 V 200 200 ns/V
VCC = 3 V to 3.6 V 100 100
VCC = 4.5 V to 5.5 V 20 20
TA Operating free-air temperature –55 125 –40 125 °C
(1) 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 (SCBA004).
(2) Product Preview

7.4 Thermal Information

THERMAL METRIC(1) SN74LV245A UNIT
DB DGV DW NS PW RGY
20 PINS
RθJA Junction-to-ambient thermal resistance 94.6 114.8 77.5 76.6 101.5 34.1 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 56.3 30.1 43.7 43.0 35.6 38.4
RθJB Junction-to-board thermal resistance 49.8 56.3 45.1 44.1 52.5 12.0
ψJT Junction-to-top characterization parameter 18.3 0.9 16.9 16.7 2.2 0.8
ψJB Junction-to-board characterization parameter 49.4 55.6 44.7 43.7 52.0 12.0
RθJC(bot) Junction-to-case (bottom) thermal resistance — — — — — 7.1
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report (SPRA953).

7.5 Electrical Characteristics

over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS VCC SN54LV245A(1) –40°C to 85°C
SN74LV245A		 –40°C to 125°C
SN74LV245A		 UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX
VOH IOH = –50 µA 2 V to
5.5 V		 VCC – 0.1 VCC – 0.1 VCC – 0.1 V
IOH = –2 mA 2.3 V 2 2 2
IOH = –8 mA 3 V 2.48 2.48 2.48
IOH = –16 mA 4.5 V 3.8 3.8 3.8
VOL IOL = 50 µA 2 V to
5.5 V		 0.1 0.1 0.1 V
IOL = 2 mA 2.3 V 0.4 0.4 0.4
IOL = 8 mA 3 V 0.44 0.44 0.44
IOL = 16 mA 4.5 V 0.55 0.55 0.55
II Control inputs VI = 5.5 V or GND 0 to
5.5 V		 ±1 ±1 ±1 µA
IOZ A or B port VO = VCC or GND 5.5 V ±5 ±5 ±5 µA
ICC VI = VCC or GND, IO = 0 5.5 V 20 20 20 µA
Ioff VI or VO = 0 to 5.5 V 0 5 5 5 µA
Ci Control inputs VI = VCC or GND 3.3 V 3 3 pF
5 V 3 3
Cio A or B port VO = VCC or GND 3.3 V 5.5 5.5 pF
5 V 5.5 5.5
(1) Product Preview

7.6 Switching Characteristics, VCC = 2.5 V ± 0.2 V

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 LOAD
CAPACITANCE		 TA = 25°C SN54LV245A(1) SN74LV245A –40°C to 125°C
SN74LV245A		 UNIT
MIN TYP MAX MIN MAX MIN MAX MIN MAX
tpd A or B B or A CL = 15 pF 8.3(2) 13(2) 1(2) 15(2) 1 15 1 17 ns
ten OE A or B 11.8(2) 19.9(2) 1(2) 22(2) 1 22 1 24
tdis OE A or B 11.8(2) 18.1(2) 1(2) 20(2) 1 20 1 22
tpd A or B B or A CL = 50 pF 11.2 15.9 1 18 1 18 1 21 ns
ten OE A or B 14.1 22.7 1 26 1 26 1 28
tdis OE A or B 17.6 23.1 1 25 1 25 1 27
tsk(o) 2 2
(1) Product Preview
(2) On products compliant to MIL-PRF-38535, this parameter is not production tested.

7.7 Switching Characteristics, VCC = 3.3 V ± 0.3 V

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 LOAD
CAPACITANCE		 TA = 25°C SN54LV245A(1) SN74LV245A –40°C to 125°C
SN74LV245A		 UNIT
MIN TYP MAX MIN MAX MIN MAX MIN MAX
tpd A or B B or A CL = 15 pF 5.9(2) 8.4(2) 1(2) 10(2) 1 10 1 11 ns
ten OE A or B 8.2(2) 13.2(2) 1(2) 15.5(2) 1 15.5 1 16.5
tdis OE A or B 9.6(2) 16.5(2) 1(2) 19.5(2) 1 19.5 1 20.5
tpd A or B B or A CL = 50 pF 7.9 11.9 1 13.5 1 13.5 1 14.5 ns
ten OE A or B 9.9 16.7 1 19 1 19 1 20
tdis OE A or B 13.9 19.8 1 22 1 22 1 23
tsk(o) 1.5 1.5
(1) Product Preview
(2) On products compliant to MIL-PRF-38535, this parameter is not production tested.

7.8 Switching Characteristics, VCC = 5 V ± 0.5 V

over recommended operating free-air temperature range (unless otherwise noted) (see Figure 3)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 LOAD
CAPACITANCE		 TA = 25°C SN54LV245A(1) SN74LV245A –40°C to 125°C
SN74LV245A		 UNIT
MIN TYP MAX MIN MAX MIN MAX MIN MAX
tpd A or B B or A CL = 15 pF 4.3(2) 5.5(2) 1(2) 6.5(2) 1 6.5 1 7 ns
ten OE A or B 5.7(2) 8.5(2) 1(2) 10.6(2) 1 10 1 10.5
tdis OE A or B 7.8(2) 12.8(2) 1(2) 14.7(2) 1 14.2 1 14.7
tpd A or B B or A CL = 50 pF 5.6 7.5 1 8.5 1 8.5 1 9 ns
ten OE A or B 7 10.6 1 12 1 12 1 12.5
tdis OE A or B 10.9 14.7 1 16 1 16 1 16.5
tsk(o) 1 1
(1) Product Preview
(2) On products compliant to MIL-PRF-38535, this parameter is not production tested.

7.9 Noise Characteristics(1)

VCC = 3.3 V, CL = 50 pF, TA = 25°C
PARAMETER SN74LV245A UNIT
MIN TYP MAX
VOL(P) Quiet output, maximum dynamic VOL 0.5 0.8 V
VOL(V) Quiet output, minimum dynamic VOL –0.4 –0.8 V
VOH(V) Quiet output, minimum dynamic VOH 2.9 V
VIH(D) High-level dynamic input voltage 2.31 V
VIL(D) Low-level dynamic input voltage 0.99 V
(1) Characteristics are for surface-mount packages only.

7.10 Operating Characteristics

TA = 25°C
PARAMETER TEST CONDITIONS VCC TYP UNIT
Cpd Power dissipation capacitance Outputs enabled CL = 50 pF, f = 10 MHz 3.3 V 20 pF
5 V 25

7.11 Typical Characteristics

D001_SCLS382.gifFigure 1. TPD vs Temperature at 3.3V
D002_SCLS382.gifFigure 2. TPD vs VCC