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PI6C20800SVE Datasheet(PDF) 2 Page - Pericom Semiconductor Corporation |
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PI6C20800SVE Datasheet(HTML) 2 Page - Pericom Semiconductor Corporation |
2 / 10 page 2 PS8887B 10/19/07 PI6C20800S PCI Express 1:8 HCSL Clock Buffer Pin Descriptions Pin Name Type Pin # Descriptions SRC_DIV# Input 1 3.3V LVTTL input for selecting input frequency divide by 2, active LOW. SRC & SRC# Input 4, 5 0.7V Differential SRC input from PI6C410 clock synthesizer OE [0:7] Input 6, 7, 14, 15, 35, 36, 43, 44 3.3V LVTTL input for enabling outputs, active HIGH. OE_INV Input 40 3.3V LVTTL input for inverting the OE, SRC_STOP# and PWRDWN# pins. When 0 = same stage When 1 = OE[0:7], SRC_STOP#, PWRDWN# inverted. OUT[0:7] & OUT[0:7]# Output 8, 9, 12, 13, 16 17, 20, 21, 29, 30, 33, 34, 37, 38, 41, 42 0.7V Differential outputs PLL/BYPASS# Input 22 3.3V LVTTL input for selecting fan-out of PLL operation. SCLK Input 23 SMBus compatible SCLOCK input SDA I/O 24 SMBus compatible SDATA IREF Input 46 External resistor connection to set the differential output current SRC_STOP# Input 27 3.3V LVTTL input for SRC stop, active LOW PLL_BW# Input 28 3.3V LVTTL input for selecting the PLL bandwidth PWRDWN# Input 26 3.3V LVTTL input for Power Down operation, active LOW LOCK Output 45 3.3V LVTTL output, transition high when PLL lock is achieved (Latched output) VDD Power 2, 11, 19, 31, 39 3.3V Power Supply for Outputs VSS Ground 3, 10, 18, 25, 32 Ground for Outputs VSS_A Ground 47 Ground for PLL VDD_A Power 48 3.3V Power Supply for PLL Serial Data Interface (SMBus) PI6C20800S is a slave only SMBus device that supports indexed block read and indexed block write protocol using a single 7-bit address and read/write bit as shown below. Address assignment A6 A5 A4 A3 A2 A1 A0 R/W 110 1 1 1 0 0/1 Data Protocol(1) 1 bit 7 bits 1 1 8 bits 1 8 bits 1 8 bits 1 8 bits 1 1 bit Start bit Slave Addr R/W Ack Register offset Ack Byte Count = N Ack Data Byte 0 Ack Data Byte N - 1 Ack Stop bit Note: 1. Register offset for indicating the starting register for indexed block write and indexed block read. Byte Count in write mode cannot be 0. 07-0237 |
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