PCA9515ADP/G-T NXP Semiconductors, PCA9515ADP/G-T Datasheet - Page 4

• Manufacturer Part Number: PCA9515ADP/G-T
• Description: IC I2C BUS REPEATER 8-TSSOP
• Manufacturer: NXP Semiconductors
• Type: Repeaterr

Specifications of PCA9515ADP/G-T

• Tx/rx Type: I²C Logic
• Delay Time: 113ns
• Capacitance - Input: 6pF
• Voltage - Supply: 2.3 V ~ 3.6 V
• Current - Supply: 800µA
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-1825-1

NXP Semiconductors
6. Functional description
PCA9515A_4
Product data sheet
6.1 Enable
6.2 I
Refer to
The PCA9515A integrated circuit contains two identical buffer circuits which enable
I
performance.
The PCA9515A contains two bidirectional, open-drain buffers specifically designed to
support the standard LOW-level contention arbitration of the I
arbitration or clock stretching, the PCA9515A acts like a pair of non-inverting, open-drain
buffers, one for SDA and one for SCL.
The EN pin is active HIGH with an internal pull-up and allows the user to select when the
repeater is active. This can be used to isolate a badly behaved slave on power-up until
after the system power-up reset. It should never change state during an I
because disabling during a bus operation will hang the bus and enabling part way through
a bus cycle could confuse the I
The enable pin should only change state when the global bus and the repeater port are in
an idle state to prevent system failures.
As with the standard I
HIGH levels on the buffered bus (standard open-collector configuration of the I
The size of these pull-up resistors depends on the system, but each side of the repeater
must have a pull-up resistor. This part designed to work with Standard-mode and
Fast-mode I
only specify 3 mA output drive; this limits the termination current to 3 mA in a generic
I
certain conditions higher termination currents can be used.
Please see Application Note AN255, I
additional information on sizing resistors and precautions when using more than one
PCA9515A/PCA9516A in a system or using the PCA9515A/PCA9516A in conjunction
with the P82B96.
2
2
2
C-bus and similar bus systems to be extended without degradation of system
C-bus system where Standard-mode devices and multiple masters are possible. Under
C-bus systems
Figure 1 “Functional diagram of
2
C-bus devices in addition to SMBus devices. Standard-mode I
2
C-bus system, pull-up resistors are required to provide the logic
Rev. 04 — 11 April 2008
2
C-bus parts being enabled.
2
C/SMBus Repeaters, Hubs and Expanders for
PCA9515A”.
2
C-bus. Except during
PCA9515A
© NXP B.V. 2008. All rights reserved.
I
2
2
C-bus operation
C-bus repeater
2
C-bus devices
2
C-bus).
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