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LEVEL-TRANSLATING I C BUS REPEATER
2
SCPS157A – DECEMBER 2007 – REVISED FEBRUARY 2008
1
FEATURES
Two-Channel Bidirectional Buffer
I
2
C Bus and SMBus Compatible
Operating Supply Voltage Range of
0.9 V to 5.5 V on A Side
Operating Supply Voltage Range of
2.7 V to 5.5 V on B Side
Voltage-Level Translation From 0.9 V to 5.5 V
and 2.7 V to 5.5 V
Footprint and Function Replacement for
PCA9515A
Active-High Repeater-Enable Input
Open-Drain I
2
C I/O
5.5-V Tolerant I
2
C and Enable Input Support
Mixed-Mode Signal Operation
D PACKAGE
(TOP VIEW)
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•
•
•
•
•
•
•
•
•
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Lockup-Free Operation
Accommodates Standard Mode and Fast Mode
I
2
C Devices and Multiple Masters
Supports Arbitration and Clock Stretching
Across Repeater
Powered-Off High-Impedance I
2
C Pins
400-kHz Fast I
2
C Bus
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
V
CCA
SCLA
SDAA
GND
1
2
3
4
8
7
6
5
V
CCB
SCLB
SDAB
EN
V
CCA
SCLA
SDAA
GND
DGK PACKAGE
(TOP VIEW)
1
2
3
4
8
7
6
5
V
CCB
SCLB
SDAB
EN
DESCRIPTION/ORDERING INFORMATION
This dual bidirectional I
2
C buffer is operational at 2.7 V to 5.5 V.
The PCA9517 is a BiCMOS integrated circuit intended for I
2
C bus and SMBus systems. It can also provide
bidirectional voltage-level translation (up-translation/down-translation) between low voltages (down to 0.9 V) and
higher voltages (2.7 V to 5.5 V) in mixed-mode applications. This device enables I
2
C and similar bus systems to
be extended, without degradation of performance even during level shifting.
The PCA9517 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I
2
C bus, thus allowing
two buses of 400-pF bus capacitance to be connected in an I
2
C application. This device can also be used to
isolate two halves of a bus for voltage and capacitance.
The PCA9517 has two types of drivers—A-side drivers and B-side drivers. All inputs and I/Os are overvoltage
tolerant to 5.5 V, even when the device is unpowered (V
CCB
and/or V
CCA
= 0 V).
ORDERING INFORMATION
T
A
–40°C to 85°C
(1)
(2)
SOIC – D
MSOP – DGK
PACKAGES
(1) (2)
Tape and reel
Tape and reel
ORDERABLE PART NUMBER
PCA9517DR
PCA9517DGKR
TOP-SIDE MARKING
PD517
7EA
Package drawings, thermal data, and symbolization are available at
For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
website at
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2007–2008, Texas Instruments Incorporated
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
