PCA9517ATP,147 NXP Semiconductors, PCA9517ATP,147 Datasheet - Page 4

• Manufacturer Part Number: PCA9517ATP,147
• Description: Interface - Signal Buffers, Repeaters LVL XLATE 5.5V 2CHAN
• Manufacturer: NXP Semiconductors

Specifications of PCA9517ATP,147

• Rohs: yes
• Package / Case: HWSON-8
• Power Dissipation: 100 mW
• Factory Pack Quantity: 4000

NXP Semiconductors
6. Functional description
PCA9517A
Product data sheet
5.2 Pin description
Table 3.
[1]
Refer to
The PCA9517A enables I
without degradation of system performance. The PCA9517A contains two bidirectional
open-drain buffers specifically designed to support up-translation/down-translation
between the low voltage (as low as 0.9 V) and a 3.3 V or 5 V I
and I/Os are overvoltage tolerant to 5.5 V even when the device is unpowered (V
and/or V
drivers turned off until V
V
(EN) HIGH, a LOW level on port A (below 0.3V
(either SDA or SCL) on and drives port B down to about 0.5 V. When port A rises above
0.3V
the pin HIGH. When port B falls first and goes below 0.3V
on and port A pulls down to 0 V. The port B pull-down is not enabled unless the port B
voltage goes below 0.4 V. If the port B low voltage does not go below 0.5 V, the port A
driver will turn off when port B voltage is above 0.7V
below 0.4 V, the port B pull-down driver is enabled and port B will only be able to rise to
0.5 V until port A rises above 0.3V
the external pull-up resistor. The V
the port A input comparators and for the power good detect circuit. The PCA9517A logic
and all I/Os are powered by the V
Symbol
V
SCLA
SDAA
GND
EN
SDAB
SCLB
V
CC(A)
CC(A)
CC(B)
HWSON8 package die supply ground is connected to both GND pin and exposed center pad. GND pin
must be connected to supply ground for proper device operation. For enhanced thermal, electrical, and
board level performance, the exposed pad needs to be soldered to the board using a corresponding
thermal pad on the board and for proper head conduction through the board, thermal vias need to be
incorporated in the printed-circuit board in the thermal pad region.
CC(A)
can be applied in any sequence at power-up. After power-up and with the enable
CC(A)
Figure 1 “Functional diagram of
, the port B pull-down driver is turned off and the external pull-up resistor pulls
Pin description
= 0 V). The PCA9517A includes a power-up circuit that keeps the output
Pin
SO8,
TSSOP8
1
2
3
4
5
6
7
8
All information provided in this document is subject to legal disclaimers.
CC(B)
Rev. 4 — 9 May 2012
2
C-bus or SMBus translation down to V
HWSON8
7
8
1
2
3
4
5
6
is above 2.5 V and the V
[1]
CC(B)
CC(A)
CC(A)
, then port B will continue to rise being pulled up by
pin.
is only used to provide the 0.3V
PCA9517A”.
Description
port A supply voltage (0.9 V to 5.5 V)
serial clock port A bus
serial data port A bus
supply ground (0 V)
active HIGH repeater enable input
serial data port B bus
serial clock port B bus
port B supply voltage (2.7 V to 5.5 V)
CC(A)
) turns the corresponding port B driver
CC(B)
Level translating I
CC(A)
. If the port B low voltage goes
CC(B)
is above 0.8 V. V
2
C-bus or SMBus. All inputs
the port A driver is turned
CC(A)
PCA9517A
as low as 0.9 V
© NXP B.V. 2012. All rights reserved.
CC(A)
2
C-bus repeater
CC(B)
reference to
CC(B)
and
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