FN7560 Rev 6.02

Page 1 of 20

Oct 2, 2023

© 2010-2023 Renesas Electronics

ISL33001, ISL33002, ISL33003

I2C Bus Buffer with Rise Time Accelerators and Hot Swap Capability

DATASHEET

The ISL33001, ISL33002, ISL33003 are 2-Channel Bus Buffers

that provide the buffering necessary to extend the bus

capacitance beyond the 400pF maximum specified by the I2C

specification. In addition, the ISL33001, ISL33002, ISL33003

feature rise time accelerator circuitry to reduce power

consumption from passive bus pull-up resistors and improve

data-rate performance. All devices also include hot swap circuitry

to prevent corruption of the data and clock lines when I2C devices

are plugged into a live backplane, and the ISL33002 and

ISL33003 add level translation for mixed supply voltage

applications. The ISL33001, ISL33002, ISL33003 operate at

supply voltages from +2.3V to +5.5V at a temperature range of

-40°C to +85°C.

Features

•2 Channel I2C compatible bi-directional buffer

• +2.3VDC to +5.5VDC supply range

• >400kHz operation

• Bus capacitance buffering

• Rise time accelerators

• Hot swapping capability

• ±6kV Class 3 HBM ESD protection on all pins

• ±12kV HBM ESD protection on SDA/SCL pins

• Enable pin (ISL33001 and ISL33003)

• Logic level translation (ISL33002 and ISL33003)

• READY logic pin (ISL33001)

• Accelerator disable pin (ISL33002)

• Pb-free (RoHS Compliant) 8 Ld SOIC (ISL33001 only),

8 Ld TDFN (3mmx3mm) and 8 Ld MSOP packages

• Low quiescent current . . . . . . . . . . . . . . . . . . . . . . . 2.1mA typ

• Low shutdown current . . . . . . . . . . . . . . . . . . . . . . . . 0.5µA typ

Applications

•I2C bus extender and capacitance buffering

• Server racks for telecom, datacom, and computer servers

• Desktop computers

• Hot-swap board insertion and bus isolation

Summary of Features

PART

NUMBER

LEVEL

TRANSLATION

ENABLE

PIN

READY

PIN

ACCELERATOR

DISABLE

ISL33001

No

Yes

Yes

No

ISL33002

Yes

No

No

Yes

ISL33003

Yes

Yes

No

No

FIGURE 1. TYPICAL OPERATING CIRCUIT

FIGURE 2. BUS ACCELERATOR PERFORMANCE

GND

SDA

SCL

+3.3V

VCC2

µC

BACK

PLANE

ISL33003

EN

VCC1

+5.0V

DEVICE

SDA

SCL

I2C

DEVICE

A

B

I2C

TIME (2µs/DIV)

100kHz I2C BUS WITH 2.7kΩ PULL-UP RESISTOR

AND 400pF BUS CAPACITANCE

WITHOUT BUFFER

WITH BUFFER