I2C HUB. PCA9518 Datasheet

PCA9518 HUB. Datasheet pdf. Equivalent

Part PCA9518
Description Expandable Five-Channel I2C HUB
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PCA9518
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PCA9518
SCPS132C – JUNE 2006 – REVISED JUNE 2014
PCA9518 Expandable Five-Channel I2C HUB
1 Features
1 Expandable Five-Channel Bidirectional Buffer
• 400-kHz Fast I2C Bus
• Operating VCC Range of 3 V to 3.6 V
• 5-V Tolerant I2C and Enable Input Pins to Support
Mixed-Mode Signal Operation
• Active-High Individual Repeater Enable Inputs
• Open-Drain Input/Outputs
• Lockup-Free Operation
• Supports Multiple Masters
• Powered-Off High-Impedance I2C Pins
• I2C Bus and SMBus Compatible
• Latchup Performance Exceeds 100 mA Per JESD
78
• 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
The PCA9518 is an expandable five-channel
bidirectional buffer for I2C and SMBus applications.
The I2C protocol requires a maximum bus
capacitance of 400 pF, which is derived from the
number of devices on the I2C bus and the bus length.
The PCA9518 overcomes this restriction by
separating and buffering the I2C data (SDA) and
clock (SCL) lines into multiple groups of 400-pF
segments. Any segment-to-segment transition sees
only one repeater delay. Each PCA9518 can
communicate with other PCA9518 hubs through a 4-
wire inter-hub expansion bus. Using multiple
PCA9518 parts, any width hub (in multiples of five)
can be implemented using the expansion pins, with
only one repeater delay and no functional
degradation of the system performance.
The PCA9518 does not support clock stretching
across the repeater.
PART NUMBER
PCA9518
Device Information(1)
PACKAGE
BODY SIZE (NOM)
SSOP (20)
7.20 mm × 5.30 mm
SOIC (20)
12.80 mm × 7.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
DB, DBQ, DW, OR PW PACKAGE
(TOP VIEW)
EXPSCL1
EXPSCL2
SCL0
SDA0
SCL1
SDA1
EN1
SCL2
SDA2
GND
1
2
3
4
5
6
7
8
9
10
20 VCC
19 EXPSDA2
18 EXPSDA1
17 EN4
16 SDA4
15 SCL4
14 EN3
13 SDA3
12 SCL3
11 EN2
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.



PCA9518
PCA9518
SCPS132C – JUNE 2006 – REVISED JUNE 2014
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Description ............................................................. 1
3 Revision History..................................................... 2
4 Description (Continued) ........................................ 3
5 Pin Configuration and Functions ......................... 4
6 Specifications......................................................... 5
6.1 Absolute Maximum Ratings .................................... 5
6.2 Handling Ratings ...................................................... 5
6.3 Recommended Operating Conditions....................... 6
6.4 Electrical Characteristics........................................... 6
6.5 Timing Requirements............................................... 7
6.6 Switching Characteristics......................................... 7
7 Parameter Measurement Information .................. 8
8 Detailed Description .............................................. 9
8.1 Functional Block Diagram ......................................... 9
8.2 Feature Description................................................. 10
8.3 Device Functional Modes........................................ 11
9 Application and Implementation ........................ 12
9.1 Typical Application ................................................. 12
10 Device and Documentation Support ................. 14
10.1 Trademarks ........................................................... 14
10.2 Electrostatic Discharge Caution ............................ 14
10.3 Glossary ................................................................ 14
11 Mechanical, Packaging, and Orderable
Information ........................................................... 14
3 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision B (October 2010) to Revision C
Page
• Added Clock Stretching Errata section................................................................................................................................. 10
Changes from Revision A (June 2010) to Revision B
Page
• Deleted any references to clock stretching in the data sheet. This does not effect min/max specifications. ........................ 1
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