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Manufacturer Part #


PCA9508 Series Hot Swappable Level Translating I2C-Bus Repeater - TSSOP - 8

ECAD Model:
Mfr. Name: NXP
Standard Pkg:
Product Variant Information section
Date Code: 2229
Product Specification Section
NXP PCA9508DP,118 - Technical Attributes
Attributes Table
Interface Circuit Type: I2C/SMBus
No of Channels: 1
Clock Frequency-Max: 400kHz
Supply Voltage-Nom: 2.7V to 5.5V
Supply Current: 1mA to 3mA
Package Style:  TSSOP-8
Mounting Method: Surface Mount
$Features & Applications

Product Highlight

  • Interface Circuit Type: I2C / SMBus
  • Number of Channels: 1
  • Clock Frequency-Max: 400 kHz
  • Number of I/O Lines: 
  • Supply Voltage-Nom: 2.7 to 5.5 V
  • Supply Current: 1 to 3 mA

The PCA9508 is a CMOS integrated circuit that supports hot-swap with zero offset and provides level shifting between low voltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) for I2C-bus or SMBus applications. While retaining all the operating modes and features of the I2C-bus system during the level shifts, it also permits extension of the I2C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Using the PCA9508 enables the system designer to isolate two halves of a bus for both voltage and capacitance, and perform hot-swap and voltage level translation. Furthermore, the dual supply pins can be powered up in any sequence; when any of the supply pins are unpowered, the 5 V tolerant I/O are high-impedance.


  • 2 channel, bidirectional buffer isolates capacitance and allows 400 pF on either side of the device
  • Supports offset-free hot-swap with IDLE/STOP detect circuitry
  • Voltage level translation from 0.9 V to 5.5 V and from 2.7 V to 5.5 V
  • Footprint and functional replacement for PCA9515, PCA9515A, PCA9517 and PCA9517A
  • I2C-bus and SMBus compatible
  • Active HIGH repeater enable input
  • Static level offset on B side
  • Open-drain input/outputs
  • Lock-up free operation


Pricing Section
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Factory Stock:Factory Stock:
Factory Lead Time:
39 Weeks
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Multiple Of:
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Product Variant Information section