PCA9517AD,118 - Brand New NXP Semiconductors Signal Buffers, Repeaters, Splitters
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General description
The PCA9517A is a CMOS integrated circuit that provides level shifting between low voltage (down to 0.9 V) and higher voltage (2.7 V to 5.5 V) I2C-bus or SMBus applications. While retaining all the operating modes and features of the I2C-bus system during the level shifts, it also permits extension of the I2C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines, thus enabling two buses of 400 pF. Using the PCA9517A enables the system designer to isolate two halves of a bus for both voltage and capacitance. The SDA and SCL pins are overvoltage tolerant and are high- impedance when the PCA9517A is unpowered.
The 2.7 V to 5.5 V bus port B drivers behave much like the drivers on the PCA9515A device, while the adjustable voltage bus port A drivers drive more current and eliminate the static offset voltage. This results in a LOW on the port B translating into a nearly 0 V LOW on the port A which accommodates smaller voltage swings of lower voltage logic.
The static offset design of the port B PCA9517A I/O drivers prevent them from being connected to another device that has rise time accelerator including the PCA9510, PCA9511, PCA9512, PCA9513, PCA9514, PCA9515A, PCA9516A, PCA9517A (port B), or PCA9518. Port A of two or more PCA9517As can be connected together, however, to allow a star topography with port A on the common bus, and port A can be connected directly to any other buffer with static or dynamic offset voltage. Multiple PCA9517As can be connected in series, port A to port B, with no build-up in offset voltage with only time of flight delays to consider.Features
■ 2 channel, bidirectional buffer isolates capacitance
and allows 400 pF on either side of the device
■ Voltage level translation from 0.9 V to 5.5 V and from 2.7 V to 5.5 V
■ Footprint and functional replacement for PCA9515/15A
■ I2C-bus and SMBus compatible
■ Active HIGH repeater enable input
■ Open-drain input/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
■ Port A operating supply voltage range of 0.9 V to 5.5 V
■ Port B operating supply voltage range of 2.7 V to 5.5 V
■ 5 V tolerant I2C-bus and enable pins
■ 0 Hz to 400 kHz clock frequency (the maximum system operating frequency
may be less than 400 kHz because of the delays added by the repeater)
■ ESD protection exceeds 5500 V HBM per
JESD22-A114, 450 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101
■ Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
■ Packages offered: SO8 and TSSOP8 -
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Datasheet
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- Datasheet: Download PCA9517AD,118
- Chipdatas Part: CD90-PCA9517AD,118
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/03 05:05 +0800
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