ZHCS887D May 2012 – April 2019 CDCUN1208LP
PRODUCTION DATA.
VDD (pin 5) is the core power supply of the device while VDDOx (pins 11, 14, 22, and 27) provide power for the output sections. The core supply must be present either before the application of the output power supplies or be present simultaneously. Applying an output power supply voltage on any of the VDDOx pins prior to the application of power to the core supply pin potentially results in improper device operation.
VDDO2 (pin 14) and VDDO4 (pin 27) provide power for OUT1/OUT2 and OUT7/OUT8, respectively. Additionally, these pins provide power to integrated voltage regulators that condition power for two banks of outputs. For example, the regulator associated with OUT1–OUT4 receives power from the VDDO2 pin. Consequently, if the application requires one or two outputs from a bank of four, then the application must use OUT3/OUT4 and apply power through VDDO2 (2). Likewise, the regulator that conditions power for OUT5–OUT8 receives power from VDDO4 (pin 27). If the application uses subset of OUT5–OUT8, then OUT7/OUT8 must be used. For example, if the application uses 6 of the 8 output channels, then VDDO1, VDDO2, and VDDO4 (along with OUT1–OUT4, and OUT7–OUT8) must be used. If the application requires the use of 7 of the 8 output channels, the VDDO1–VDDO4 are used, and OUT1–OUT7 or OUT1–OUT6 and OUT8 could be used.