PCA9517_15 Datasheet, PDF (1/28 Pages) Texas Instruments – PCA9517 Level-Translating

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PCA9517
SCPS157E – DECEMBER 2007 – REVISED JUNE 2014
PCA9517 Level-Translating I²C Bus Repeater
Not Recommended for New Designs
1 Features
•1 Two-Channel Bidirectional Buffer
• I²C 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 I²C I/O
• 5.5-V Tolerant I²C and Enable Input Support
Mixed-Mode Signal Operation
• Lockup-Free Operation
• Accommodates Standard Mode and Fast Mode
I²C Devices and Multiple Masters
• Powered-Off High-Impedance I²C Pins
• 400-kHz Fast I²C 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)
2 Description
This dual bidirectional I²C buffer is operational at
2.7 V to 5.5 V.
The PCA9517 is a BiCMOS integrated circuit
intended for I²C 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 I²C
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 I²C bus, thus
allowing two buses of 400-pF bus capacitance to be
connected in an I²C 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).
The PCA9517 doesnot support clock stretching and
arbitration across the repeater.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
PCA9517
SOIC (8)
VSSOP (8)
4.90 mm × 3.91 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
V_CCA
SCLA
SDAA
GND
D PACKAGE
(TOP VIEW)
1
8
2
7
3
6
4
5
V_CCB
SCLB
SDAB
EN
DGK PACKAGE
(TOP VIEW)
V_CCA
1
SCLA 2
SDAA 3
GND 4
8
V_CCB
7 SCLB
6 SDAB
5 EN
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.