Level Translation

PCA9306 Bidirectional I2C

Dual Bi-Directional I2C-Bus and SMBus Voltage Level-Translator incorporates ESD protection

 

TXB0104

4-Bit Bidirectional Voltage-Level Translator with Auto Direction Sensing and +/-15 kV ESD Protect

  • TXB0108: 8-Bit Bidirectional Voltage-Level Translator with Auto Direction Sensing and +/-15-kV ESD Protect
  • TXS0104E: 4-Bit Bidirectional Voltage-Level Translator for Open-Drain Applications
  • TXS0102: 2-Bit Bidirectional Voltage-Level Translator for Open-Drain Application
  • TPS61041: 28-V, 250-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications
  • PCA9534: Remote 8-Bit I2C and Low-Power I/O Expander with Interrupt Output and Configuration Registers
  • SN74LVC2T45: Dual-Bit Dual Supply Transceiver with Configurable Voltage Translation and 3-State Outputs

 

http://www.semtech.com/products/IO-Expander-Lowest-Voltage-IO-Expander-family.jsp

TI notes: http://focus.tij.co.jp/jp/lit/an/scea035a/scea035a.pdf

Maxim: http://www.maxim-ic.com/appnotes.cfm/an_pk/3007


http://www.interfacebus.com/Design_Translation.html

Google for: auto direction sensing bidirectional level translator

Good article on restrictions of auto direction solutions http://www.wirelessdesignmag.com/pdfs/wdd060401_feature1.pdf

http://www.standardics.nxp.com/support/documents/i2c/pdf/an97055.pdf

http://forum.sparkfun.com/viewtopic.php?p=16942

http://delphys.net/d.holmes/hardware/levelshift.html

NXT http://www.standardics.nxp.com/support/documents/logic/pdf/an10156.pdf

LV/LVX

LVC/LCX

ALVC

LVT

9 ns typical tPD

4 ns typical tPD

2 ns typical tPD

2 ns typical tPD

6-8 mA IOH/IOL

24 mA IOH/IOL

24 mA IOH/IOL

32/64 mA IOH/IOL

130 ohm line drive

50 ohm line drive

50 ohm line drive

35 ohm line drive

20 mA standby current

10 mA standby current

40 mA standby current

190 mA standby current

VCC: 1 - 3.6 V

VCC: 1.2 - 3.6 V

VCC: 1.2 - 3.6 V

VCC: 2.7 - 3.6 V

Gates, MSI, bus interface functions

Gates, MSI, 8/16/32 bit bus interface functions

Gates, MSI, 8/16/32 bit bus interface functions

Gates, MSI, 8/16/32 bit bus

interface functions

 

 

 

5 V tolerant inputs 1

Termination resistor option

Termination resistor option

Termination resistor option

 

5 V tolerant I/O

5 V tolerant inputs 2

5 V tolerant I/O

 

Supports hot swap

Bus hold feature

Supports hot swap

 

Bus hold feature

 

Bus hold feature

Notes:

1. Vendor dependent

2. Vendor dependent

Propagation delays are approximate typicals for a '245 function

 

http://www.standardics.nxp.com/support/techtips/levelshift/ 

 

An economical 74HCT08 (quad AND gate), 74ACT125 (quad 3-state buffer) or many other 5V CMOS chips with TTL level input buffers may be used to provide the necessary level shifting. The use of 3-state buffers permits easy integration into systems which share the SPI bus with other devices.