ISL33001_14 Datasheet, PDF (1/18 Pages) Intersil Corporation – I2C Bus Buffer with Rise Time Accelerators and Hot Swap Capability

I²C Bus Buffer with Rise Time Accelerators and
Hot Swap Capability
ISL33001, ISL33002, ISL33003
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.
Summary of Features
PART
NUMBER
ISL33001
ISL33002
ISL33003
LEVEL
ENABLE READY
TRANSLATION PIN PIN
No
Yes
Yes
Yes
No
No
Yes
Yes
No
ACCELERATOR
DISABLE
No
Yes
No
Related Literature
• AN1543, “ISL33001MSOPEVAL1Z, ISL33002MSOPEVAL1Z,
ISL33003MSOPEVAL1Z Evaluation Board User’s Manual”
• AN1637, “Level Shifting Between 1.8V and 3.3V Using I²C
Buffers”
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
V_CC1 +3.3V
+5.0V
V_CC2
µC
SDA
SCL
EN
ISL33003
BACK
PLANE
SDA
SCL
GND
I²C
DEVICE
A
I²C
DEVICE
B
100kHz I²C BUS WITH 2.7kΩ PULL-UP RESISTOR
AND 400pF BUS CAPACITANCE
WITHOUT BUFFER
WITH BUFFER
FIGURE 1. TYPICAL OPERATING CIRCUIT
TIME (2µs/DIV)
FIGURE 2. BUS ACCELERATOR PERFORMANCE
July 11, 2014
1
FN7560.6
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 |Copyright Intersil Americas LLC. 2010-2014. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.