Datasheet

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DESCRIPTION/ORDERING INFORMATION (CONTINUED)
PCA9515A
DUAL BIDIRECTIONAL I
2
C BUS AND SMBus REPEATER
SCPS150B – DECEMBER 2005 – REVISED OCTOBER 2007
ORDERING INFORMATION
T
A
PACKAGE
(1) (2)
ORDERABLE PART NUMBER TOP-SIDE MARKING
(3)
MSOP – DGK Reel of 2500 PCA9515ADGKR 7B_
Tube of 75 PCA9515AD
SOIC – D Reel of 2500 PCA9515ADR PD515A
Reel of 250 PCA9515ADT
SON – DRG TBD PCA9515ADRGR PREVIEW
– 40 ° C to 85 ° C
Reel of 3000 PCA9515ADCTR
SSOP – DCT 7BG_ _ _
Reel of 250 PCA9515ADCTT
Tube of 150 PCA9515APW
TSSOP – PW Reel of 2000 PCA9515APWR PD515A
Reel of 250 PCA9515APWT
(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging .
(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 .
(3) DCT: The actual top-side marking has three additional characters that designate the year, month, and assembly/test site.
DGK: The actual top-side marking has one additional character that designates the assembly/test site.
The output low levels for each internal buffer are approximately 0.5 V, but the input voltage of each internal
buffer must be 70 mV or more below the output low level, when the output internally is driven low. This prevents
a lockup condition from occurring when the input low condition is released.
Two or more PCA9515A devices cannot be used in series. The PCA9515A design does not allow this
configuration. Because there is no direction pin, slightly different valid low-voltage levels are used to avoid lockup
conditions between the input and the output of each repeater. A valid low applied at the input of a PCA9515A is
propagated as a buffered low with a slightly higher value on the enabled outputs. When this buffered low is
applied to another PCA9515A-type device in series, the second device does not recognize it as a valid low and
does not propagate it as a buffered low again.
The device contains a power-up control circuit that sets an internal latch to prevent the output circuits from
becoming active until V
CC
is at a valid level (V
CC
= 2.3 V).
As with the standard I
2
C system, pullup resistors are required to provide the logic high levels on the buffered bus.
The PCA9515A has standard open-collector configuration of the I
2
C bus. The size of these pullup resistors
depends on the system, but each side of the repeater must have a pullup resistor. The device is designed to
work with Standard Mode and Fast Mode I
2
C devices in addition to SMBus devices. Standard Mode I
2
C devices
only specify 3 mA in a generic I
2
C system where Standard Mode devices and multiple masters are possible.
Under certain conditions, high termination currents can be used.
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Product Folder Link(s): PCA9515A