PCA9509P View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

PCA9509P

Low power level translating I2C-bus/SMBus repeater

NXP Semiconductors. 

NXP Semiconductors

PCA9509P

Low power level translating I2C-bus/SMBus repeater

1.1 Selection recommendations

The PCA9509P should be used if an external A-port pull-up resistor is required to adjust

current for noise margin considerations or to reduce operating current consumption. See

Table 1 for comparison.

Table 1. Device selection recommendation

Concern

Recommended device

PCA9509

PCA9509A

A-port — lowest voltage

1.0 V

0.85 V

A-port — current source[1] yes — 1 mA

yes — 270 A

operating current[2]

< 6.1 mA

< 1.9 mA

standby current EN = LOW < 2 mA

< 22 A max.

PCA9509P

0.85 V

no — external pull-up

< 0.95 mA

< 22 A max.

[1] The PCA9509 current mirrors do not shut down when the device is disabled allowing instant turn-on, but at

the cost of the higher standby current. The PCA9509A and PCA9509P current mirrors are turned off when

disabled for lowest standby power consumption, but sufficient delay (10 s) after enable is needed before

resuming operation.

[2] Operating currents do not include the current consumed by the external pull-ups on B-port or the external

pull-ups on the A-port of the PCA9509P.

2. Features and benefits

 Bidirectional buffer isolates capacitance and allows 400 pF on port B of the device

 Voltage level translation from port A (0.8 V to 2.0 V) to port B (2.3 V to 5.5 V)

 No internal current source on A port to reduce current consumption for portable

applications

 Active HIGH enable input disables current mirrors to reduce standby power

 Open-drain inputs/outputs

 Lock-up free operation

 Supports arbitration and clock stretching across the repeater

 Accommodates Standard-mode and Fast-mode I2C-bus devices and multiple masters

 Powered-off high-impedance I2C-bus pins

 Operating supply voltage range of 0.8 V to 2.0 V on port A, 2.3 V to 5.5 V on port B

 All pins are 5 V tolerant with respect to ground pin

 0 Hz to 400 kHz clock frequency

Remark: The maximum system operating frequency may be less than 400 kHz

because of the delays added by the repeater.

 ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per

JESD22-C101

 Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

 Packages offered: TSSOP8, XQFN8

PCA9509P

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 4 — 18 May 2018

© NXP B.V. 2018. All rights reserved.

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