PCA9518 Datasheet, PDF (1/20 Pages) NXP Semiconductors – Expandable 5-channel I2C hub

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PCA9518
EXPANDABLE FIVE-CHANNEL I²C HUB
SCPS132A – JUNE 2006 – REVISED JULY 2007
FEATURES
• Expandable Five-Channel Bidirectional Buffer
• 400-kHz Fast I²C Bus
• Operating V_CC 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 Arbitration and Clock Stretching
Across the Repeater
• 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)
DB, DBQ, DW, OR PW PACKAGE
(TOP VIEW)
EXPSCL1 1
EXPSCL2 2
SCL0 3
SDA0 4
SCL1 5
SDA1 6
EN1 7
SCL2 8
SDA2 9
GND 10
20 V_CC
19 EXPSDA2
18 EXPSDA1
17 EN4
16 SDA4
15 SCL4
14 EN3
13 SDA3
12 SCL3
11 EN2
DESCRIPTION/ORDERING INFORMATION
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.
T_A
–40°C to 85°C
SSOP – DB
QSOP – DBQ
SOIC – DW
TSSOP – PW
ORDERING INFORMATION
PACKAGE ^{(1) (2)}
ORDERABLE PART NUMBER
Reel of 2000
PCA9518DBR
Reel of 2500
PCA9518DBQR
Tube of 25
PCA9518DW
Reel of 2000
PCA9518DWR
Tube of 70
PCA9518PW
Reel of 2000
PCA9518PWR
TOP-SIDE MARKING
PD518
PCA9518
PCA9518
PD518
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
(2) 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 www.ti.com.
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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.
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