PI6C185-00 Datasheet, PDF (1/7 Pages) Pericom Semiconductor Corporation – Precision 1-7 Clock Buffer

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Precision 1-7 Clock Buffer
Product Features
• High-speed, low-noise non-inverting 1-7 buffer
• Switching speed up to 140 MHz (PI6C185-00A)*
• Supports up to three mobile SDRAM DIMMs
• Low skew (<250ps) between any two output clocks
• I²C Serial Configuration interface
• Multiple V_DD, V_SS pins for noise reduction
• 3.3V power supply voltage
• 20-pin TSSOP (L) and QSOP (Q) packages
* Maximum Operating Frequencies:
PI6C185-00 = 125 MHz;
PI6C185-00A = 140 MHz.
Block Diagram
Description
The PI6C185-00 is a high-speed low-noise 1-7 non-inverting
buffer designed for SDRAM clock buffer applications.
This buffer is intended to be used with the PI6C10X clock genera-
tor for Intel Architecture-based Mobile systems.
At power up all SDRAM output are enabled and active. The I²C
Serial control may be used to individually activate/deactivate any
of the 7 output drivers.
Note:
Purchase of I²C components from Pericom conveys a license to use
them in an I²C system as defined by Philips.
Pin Configuration
BUF_IN
SDATA
I2C
SCLOCK
I/O
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM6
V_{DD 1}
SDRAM0 ₂
SDRAM1 ₃
V_{SS 4}
BUF_IN ₅
V_{DD 6}
SDRAM2 ₇
V_{SS 8}
V_{DD 9}
SDATA ₁₀
20-Pin
L, Q
20 V_DD
19 ^SDRAM6
18 SDRAM5
17 V_SS
16 ^VDD
15 SDRAM4
14 SDRAM3
13 V_SS
12 V_SS
11 SCLK
1
PS8317A 03/22/01