Datasheet

PCA9515B
SCPS232A MARCH 2012REVISED MAY 2013
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ORDERING INFORMATION
T
A
PACKAGE
(1) (2)
ORDERABLE PART NUMBER TOP-SIDE MARKING
(3)
–40°C to 85°C MSOP – DGK Reel of 2500 PCA9515BDGKR 7SA
(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) DGK: The actual top-side marking has one additional character that designates the assembly/test site.
DESCRIPTION (CONTINUED)
The low level outputs for each internal buffer are approximately 0.5 V; however, the input voltage of each internal
buffer must be 70 mV or more below the low level output when the output is driven low internally. This prevents a
lockup condition from occurring when the input low condition is released.
Two or more PCA9515B devices cannot be used in series. Since there is no direction pin, 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 PCA9515B, is propagated as a buffered low with a higher value on the enabled outputs.
When this buffered low is applied to another PCA9515B-type device in series, the second device does not
recognize it as a valid low and does not propagate it as a buffered low.
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 PCA9515B has standard open-collector configuration of the I
2
C bus. The size of the pullup resistors depend
on the system; however, 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 a 3 mA termination current 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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