SCES770A December   2008  – March 2017 SN74LVC8T245-EP

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information PW, DW and RHL
    5. 7.5  Electrical Characteristics
    6. 7.6  Switching Characteristics
    7. 7.7  Switching Characteristics
    8. 7.8  Switching Characteristics
    9. 7.9  Switching Characteristics
    10. 7.10 Operating 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
      1. 9.3.1 Fully Configurable Dual-Rail Design Allows Each Port to Operate Over the Full 1.65-V to 5.5-V Power-Supply Range
      2. 9.3.2 Ioff Supports Partial-Power-Down Mode Operation
    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 Curve
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Community Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7 Specifications

7.1 Absolute Maximum Ratings(1)

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
VCCA
VCCB 		Supply voltage –0.5 6.5 V
VI Input voltage(2) I/O ports (A port) –0.5 6.5 V
I/O ports (B port) –0.5 6.5
Control inputs –0.5 6.5
VO Voltage applied to any output
in the high-impedance or power-off state(2) 		A port –0.5 6.5 V
B port –0.5 6.5
VO Voltage applied to any output in the high or low state(2)(3) A port –0.5 VCCA + 0.5 V
B port –0.5 VCCB + 0.5
IIK Input clamp current VI < 0 –50 mA
IOK Output clamp current VO < 0 –50 mA
IO Continuous output current ±50 mA
Continuous current through each VCCA, VCCB, and GND ±100 mA
RθJA Package thermal impedance(4) 88 °C/W
Tstg Storage temperature –65 150 °C
(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 in the 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) The output positive-voltage rating may be exceeded up to 6.5-V maximum if the output current rating is observed.
(4) The package thermal impedance is calculated in accordance with JESD 51-7.

7.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±4000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1000
Machine model ±200
(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(1)(2)(3)(4)

VCCI VCCO MIN MAX UNIT
VCCA Supply voltage 1.65 5.5 V
VCCB 1.65 5.5
VIH High-level
input voltage		 Data inputs(5) 1.65 to 1.95 V VCCI  × 0.65 V
2.3 to 2.7 V 1.7
3 to 3.6 V 2
4.5 to 5.5 V VCCI  × 0.7
VIL Low-level
input voltage		 Data inputs(5) 1.65 to 1.95 V VCCI  × 0.35 V
2.3 to 2.7 V 0.7
3 to 3.6 V 0.8
4.5 to 5.5 V VCCI  × 0.3
VIH High-level
input voltage		 Control inputs
(referenced to VCCA)(6) 		1.65 to 1.95 V VCCA  × 0.65 V
2.3 to 2.7 V 1.7
3 to 3.6 V 2
4.5 to 5.5 V VCCA  × 0.7
VIL Low-level
input voltage		 Control inputs
(referenced to VCCA)(6) 		1.65 to 1.95 V VCCA  × 0.35 V
2.3 to 2.7 V 0.7
3 to 3.6 V 0.8
4.5 to 5.5 V VCCA  × 0.3
VI Input voltage Control inputs 0 5.5 V
VI/O Input/output
voltage		 Active state 0 VCCO V
Tri-state 0 5.5
IOH High-level output current 1.65 to 1.95 V –4 mA
2.3 to 2.7 V –8
3 to 3.6 V –24
4.5 to 5.5 V –32
IOL Low-level output current 1.65 to 1.95 V 4 mA
2.3 to 2.7 V 8
3 to 3.6 V 24
4.5 to 5.5 V 32
Δt/Δv Input transition
rise or fall rate		 Data inputs 1.65 to 1.95 V 20 ns/V
2.3 to 2.7 V 20
3 to 3.6 V 10
4.5 to 5.5 V 5
TA Operating free-air temperature –55 125 °C
(1) VCCI is the VCC associated with the data input port.
(2) VCCO is the VCC associated with the output port.
(3) All unused or driven (floating) data inputs (I/Os) of the device must be held at logic HIGH or LOW (preferably VCCI or GND) to ensure proper device operation and minimize power. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
(4) All unused control inputs must be held at VCCA or GND to ensure proper device operation and minimize power consumption.
(5) For VCCI values not specified in the data sheet, VIH min = VCCI  × 0.7 V, VIL max = VCCI  × 0.3 V.
(6) For VCCA values not specified in the data sheet, VIH min = VCCA  × 0.7 V, VIL max = VCCA  × 0.3 V.

7.4 Thermal Information PW, DW and RHL

THERMAL METRIC(1) SN74LVC8T245-EP UNIT
PW DW RHL
24 PINS 24 PINS 24 PINS
RθJA Junction-to-ambient thermal resistance 90.6 68.1 36.2 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 27.6 35.6 27.9 °C/W
RθJB Junction-to-board thermal resistance 45.3 37.8 13.5 °C/W
ψJT Junction-to-top characterization parameter 1.3 13 0.5 °C/W
ψJB Junction-to-board characterization parameter 44.8 37.5 13.4 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance N/A N/A 3.6 °C/W
(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)(1)(2)
PARAMETER TEST CONDITIONS VCCA VCCB TA = 25°C TA = –55°C to 125°C UNIT
MIN TYP MAX MIN MAX
VOH IOH = –100 μA, VI = VIH 1.65 V to 4.5 V 1.65 V to 4.5 V VCCO  – 0.1 V
IOH = –4 mA, VI = VIH 1.65 V 1.65 V 1.2
IOH = –8 mA, VI = VIH 2.3 V 2.3 V 1.9
IOH = –24 mA, VI = VIH 3 V 3 V 2.4
IOH = –32 mA, VI = VIH 4.5 V 4.5 V 3.8
VOL IOL = 100 μA, VI = VIL 1.65 V to 4.5 V 1.65 V to 4.5 V 0.1 V
IOL = 4 mA, VI = VIL 1.65 V 1.65 V 0.45
IOL = 8 mA, VI = VIL 2.3 V 2.3 V 0.3
IOL = 24 mA, VI = VIL 3 V 3 V 0.55
IOL = 32 mA, VI = VIL 4.5 V 4.5 V 0.55
II DIR VI = VCCA or GND 1.65 V to 5.5 V 1.65 V to 5.5 V –1 1 –2 2 μA
Ioff A or B port VI or VO = 0 to 5.5 V 0 V 0 V to 5.5 V –1 1 –11 11 μA
0 V to 5.5 V 0 V –1 1 –11 11
IOZ A or B port VO = VCCO or GND,
OE = VIH 		1.65 V to 5.5 V 1.65 V to 5.5 V –1 1 –6 6 μA
ICCA VI = VCCI or GND, IO = 0 1.65 V to 5.5 V 1.65 V to 5.5 V 20 μA
5 V 0 V 20
0 V 5 V –10
ICCB VI = VCCI or GND, IO = 0 1.65 V to 5.5 V 1.65 V to 5.5 V 20 μA
5 V 0 V –10
0 V 5 V 20
ICCA + ICCB VI = VCCI or GND, IO = 0 1.65 V to 5.5 V 1.65 V to 5.5 V 40 μA
ΔICCA A port One A port at VCCA  – 0.6 V,
DIR at VCCA, B port = open		 3 V to 5.5 V 3 V to 5.5 V 50 μA
DIR DIR at VCCA  – 0.6 V,
B port = open,
A port at VCCA or GND		 50
ΔICCB B port One B port at VCCB  – 0.6 V,
DIR at GND, A port = open		 3 V to 5.5 V 3 V to 5.5 V 50 μA
Ci Control inputs VI = VCCA or GND 3.3 V 3.3 V 4 5 pF
Cio A or B
port		 VO = VCCA/B or GND 3.3 V 3.3 V 8.5 10 pF
(1) VCCO is the VCC associated with the output port.
(2) VCCI is the VCC associated with the input port.

7.6 Switching Characteristics

over recommended operating free-air temperature range, VCCA = 1.8 V ± 0.15 V (unless otherwise noted) (see Figure 1)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 VCCB = 1.8 V
± 0.15 V		 VCCB = 2.5 V
± 0.2 V		 VCCB = 3.3 V
± 0.3 V		 VCCB = 5 V
± 0.5 V		 UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
tPLH A B 1.7 25.9 1.3 13.2 1 11.4 0.8 11.1 ns
tPHL
tPLH B A 0.9 28.8 0.8 27.6 0.7 27.4 0.7 27.4 ns
tPHL
tPHZ OE A 1.5 33.6 1.5 33.4 1.5 33.3 1.4 33.2 ns
tPLZ
tPHZ OE B 2.4 36.2 1.9 17.1 1.7 16 1.3 14.3 ns
tPLZ
tPZH OE A 0.4 28 0.4 27.8 0.4 27.7 0.4 27.7 ns
tPZL
tPZH OE B 1.8 40 1.5 20 1.2 16.6 0.9 14.8 ns
tPZL

7.7 Switching Characteristics

over recommended operating free-air temperature range, VCCA = 2.5 V ± 0.2 V (unless otherwise noted) (see Figure 1)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 VCCB = 1.8 V
± 0.15 V		 VCCB = 2.5 V
± 0.2 V		 VCCB = 3.3 V
± 0.3 V		 VCCB = 5 V
± 0.5 V		 UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
tPLH A B 1.5 25.4 1.2 13 0.8 10.2 0.6 8.8 ns
tPHL
tPLH B A 1.2 13.3 1 13.1 1 12.9 0.9 12.8 ns
tPHL
tPHZ OE A 1.4 13 1.4 13 1.4 13 1.4 13 ns
tPLZ
tPHZ OE B 2.3 33.6 1.8 15 1.7 14.3 0.9 10.9 ns
tPLZ
tPZH OE A 1 17.2 1 17.3 1 17.2 1 17.3 ns
tPZL
tPZH OE B 1.7 32.2 1.5 18.1 1.2 14.1 1 11.2 ns
tPZL

7.8 Switching Characteristics

over recommended operating free-air temperature range, VCCA = 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 VCCB = 1.8 V
± 0.15 V		 VCCB = 2.5 V
± 0.2 V		 VCCB = 3.3 V
± 0.3 V		 VCCB = 5 V
± 0.5 V		 UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
tPLH A B 1.5 25.2 1.1 12.8 0.8 10.3 0.5 10.4 ns
tPHL
tPLH B A 0.8 11.2 0.8 10.2 0.7 10.1 0.6 10 ns
tPHL
tPHZ OE A 1.6 12.2 1.6 12.2 1.6 12.2 1.6 12.2 ns
tPLZ
tPHZ OE B 2.1 33 1.7 14.3 1.5 12.6 0.8 10.3 ns
tPLZ
tPZH OE A 0.8 14.1 0.8 13.6 0.8 13.2 0.8 13.6 ns
tPZL
tPZH OE B 1.8 31.7 1.4 18.4 1.1 12.9 0.9 10.9 ns
tPZL

7.9 Switching Characteristics

over recommended operating free-air temperature range, VCCA = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER FROM
(INPUT)		 TO
(OUTPUT)		 VCC = 1.8 V
± 0.15 V		 VCC = 2.5 V
± 0.2 V		 VCC = 3.3 V
± 0.3 V		 VCC = 5 V
± 0.5 V		 UNIT
MIN MAX MIN MAX MIN MAX MIN MAX
tPLH A B 1.5 25.4 1 12.8 0.7 10 0.4 8.2 ns
tPHL
tPLH B A 0.7 11 0.4 8.8 0.3 8.5 0.3 8.3 ns
tPHL
tPHZ OE A 0.3 9.4 0.3 9.4 0.3 9.4 0.3 9.4 ns
tPLZ
tPHZ OE B 2 32.7 1.6 13.7 1.4 12 0.7 9.7 ns
tPLZ
tPZH OE A 0.7 10.9 0.7 10.9 0.7 10.9 0.7 10.9 ns
tPZL
tPZH OE B 1.5 31.6 1.3 18.4 1 13.7 0.9 10.7 ns
tPZL

7.10 Operating Characteristics

TA = 25°C
PARAMETER TEST
CONDITIONS		 VCCA =
VCCB = 1.8 V		 VCCA =
VCCB = 2.5 V		 VCCA =
VCCB = 3.3 V		 VCCA =
VCCB = 5 V		 UNIT
TYP TYP TYP TYP
CpdA (1) A-port input, B-port output CL = 0,
f = 10 MHz,
tr = tf = 1 ns		 2 2 2 3 pF
B-port input, A-port output 12 13 13 16
CpdB (1) A-port input, B-port output 13 13 14 16 pF
B-port input, A-port output 2 2 2 3
(1) Power dissipation capacitance per transceiver