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TCA9509RVHR 数据手册 - TI（德州仪器）
制造商:
TI（德州仪器）
分类:
接口芯片
封装:
XFQFN-8
描述:
TEXAS INSTRUMENTS TCA9509RVHR 芯片, 总线中继器, I2C, 8X2QFN
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TCA9509RVHR数据手册
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3
2
5
6
6
4
8
1
3
2
5
6
7
4
8
1
V
CCA
SCLA
SDAA
SCLB
SDAB
GND
V
CCB
EN
TCA9509
RVH PACKAGE
(TOP VIEW)
1
8
V
CCA
V
CCB
4
5
GND
EN
3
6
SDAA
SDAB
2
7
SCLA SCLB
DGK PACKAGE
(TOP VIEW)
TCA9509
www.ti.com
SCPS225B –AUGUST 2011– REVISED JANUARY 2012
LEVEL-TRANSLATING I
2
C/SMBUS BUS REPEATER
Check for Samples: TCA9509
1
FEATURES
• Two-Channel Bidirectional Buffer • Accommodates Standard Mode and Fast Mode
I
2
C Devices and Multiple Masters
• I
2
C Bus and SMBus Compatible
• Supports Arbitration and Clock Stretching
• Operating Supply Voltage Range of
Across Repeater
2.7 V to 5.5 V on B side
• Powered-Off High-Impedance I
2
C bus pins
• Operating Voltage Range of 0.9 V to V
CCB
– 1V
on A Side • Supports 400-kHz Fast I
2
C Bus operating
speeds
• Voltage-Level Translation From
0.9 V to (V
CCB
- 1V) and 2.7 V to 5.5 V • Available in
• Active-High Repeater-Enable Input – 1.6mm x 1.6mm, 0.4mm height, 0.5mm pitch
QFN pkg
• Requires no external pull-up resistors on
lower-voltage port-A – 3mm x 3mm industry standard MSOP pkg
• Open-Drain I
2
C I/O • Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
• 5.5-V Tolerant I
2
C and Enable Input Support
Mixed-Mode Signal Operation • ESD Protection Exceeds JESD 22
• Lockup-Free Operation – 2000-V Human-Body Model (A114-A)
– 1000-V Charged-Device Model (C101)
DESCRIPTION/ORDERING INFORMATION
This TCA9509 integrated circuit is an I
2
C bus/SMBus Repeater for use in I
2
C/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 TCA9509 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I
2
C bus, thus allowing
400-pF bus capacitance on the B-side. This device can also be used to isolate two halves of a bus for voltage
and capacitance.
The TCA9509 has two types of drivers – A-side drivers and B-side drivers. All inputs and B-side I/O’s are
overvoltage tolerant to 5.5V. The A-side I/O’s are overvoltage tolerant to 5.5V when the device is unpowered
(VCCB and/or VCCA=0V).
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.
Copyright © 2011–2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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