PCA9507 2 2-wire serial bus extender for HDMI DDC I C-bus and SMBus Rev. 01 7 February 2008 Product data sheet 1. General description The PCA9507 is a 2-wire serial bus extender providing 3.3 V to 5 V level shift that allows 2 up to 18 meters bus extension for reliable DDC, I C-bus or SMBus applications. While 2 retaining all the operating modes and features of the I C-bus system during the level 2 shifts, it also permits extension of the I C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) line as well as the rise time accelerator on port A enabling the bus to drive a load up to 1400 pF or distance of 18 m on port A, and 400 pF on port B. Using the PCA9507 enables the system designer to isolate bus capacitance to meet HDMI DDC version 1.3 distance specication. The SDA and SCL pins are overvoltage tolerant and are high-impedance when the PCA9507 is unpowered. The port B drivers with static level offset behave much like the drivers on the PCA9515 device, while the port A drivers integrate the rise time accelerator, sink more current and eliminate the static offset voltage. This results in a LOW on port B translating into a nearly 0 V LOW on port A. The static level offset design of the port B I/O drivers prevent them from being connected to another device that has rise time accelerator including the PCA9510, PCA9511, PCA9512, PCA9513, PCA9514, PCA9515, PCA9516A, PCA9517 (B-side), or PCA9518. The port A sides of two or more PCA9507s 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 PCA9507s can be connected in series, port A to port B, with no build-up in offset voltage with only time of ight delays to consider. Rise time accelerator on port A is turned on when input threshold is above 0.3V . CC(A) The PCA9507 drivers are not enabled unless V and V are above 2.7 V. The EN CC(A) CC(B) pin can also be used to turn the drivers on and off under system control. Caution should be observed to only change the state of the enable pin when the bus is idle. The output pull-down on the port B internal buffer LOW is set for approximately 0.5 V, while the input threshold of the internal buffer is set about 70 mV lower (0.43 V). When the port B I/O is driven LOW internally, the LOW is not recognized as a LOW by the input. This prevents a lock-up condition from occurring. 2. Features n 2 channel, bidirectional buffer isolates capacitance allowing 1400 pF on port A and 400 pF on port B n Exceeds 18 meters (above the maximum distance for HDMI DDC) n Rise time accelerator and normal I/O on port A n Static level offset on port B n Voltage level translation from 2.7 V to 5.5 V n Upgrade replacement over PCA9517 for cable applicationPCA9507 NXP Semiconductors 2 2-wire serial bus extender for HDMI DDC I C-bus and SMBus 2 n I C-bus, SMBus and DDC-bus compatible n Active HIGH buffer enable input n Open-drain input/outputs n Lock-up free operation n Supports arbitration and clock stretching across the repeater 2 n Accommodates Standard-mode and Fast-mode I C-bus devices and multiple masters 2 n Powered-off high-impedance I C-bus pins n Port A operating supply voltage range of 2.7 V to 5.5 V n Port B operating supply voltage range of 2.7 V to 5.5 V 2 n 5 V tolerant I C-bus and enable pins n 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) n ESD protection exceeds 5000 V HBM per JESD22-A114, 400 V MM per JESD22-A115, and 1000 V CDM per JESD22-C101 n Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA n Packages offered: SO8 and TSSOP8 3. Ordering information Table 1. Ordering information Type number Topside Package mark Name Description Version PCA9507D PCA9507 SO8 plastic small outline package 8 leads SOT96-1 body width 3.9 mm 1 PCA9507DP 9507 TSSOP8 plastic thin shrink small outline package SOT505-1 8 leads body width 3 mm 1 Also known as MSOP8. 4. Functional diagram V V CC(A) CC(B) V CC(A) DYNAMIC PULL-UP SDAA SDAB V CC(A) DYNAMIC PULL-UP SCLA SCLB V CC(B) 100 kW PCA9507 EN 002aad401 GND Fig 1. Functional diagram of PCA9507 PCA9507 1 NXP B.V. 2008. All rights reserved. Product data sheet Rev. 01 7 February 2008 2 of 20