pi6cv855 Pericom Semiconductor Corporation, pi6cv855 Datasheet

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pi6cv855

Manufacturer Part Number
pi6cv855
Description
2.5v, 170 Mhz, 5 Output Sstl-2 Zero Delay Clock Driver
Manufacturer
Pericom Semiconductor Corporation
Datasheet

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Block Diagram
Features
• PLL clock distribution optimized for SSTL_2 DDR SDRAM
• Distributes one differential clock input pair to five differential
• Inputs (CLK,CLK) and (FBIN,FBIN): SSTL_2
• Outputs (Yx, Yx), (FBOUT, FBOUT): SSTL_2
• External feedback pins (FBIN,FBIN) are used to
• Operates at AV
• Packaging (Pb-free & Green available):
CLK
CLK
FBIN
FBIN
AV
applications.
clock output pairs.
synchronize the outputs to the input clocks.
and V
– 28-pin TSSOP (L)
DD
08-0030
DDQ
= 2.5V for differential output drivers
DD
= 2.5V for core circuit and internal PLL,
Test Ciruit
PLL
Logic
and
Y0
Y0
Y1
Y1
Y2
Y2
Y3
Y3
Y4
Y4
FBOUT
FBOUT
1
Description
PI6CV855 PLL clock device is developed for SSTL_DDR SDRAM
applications. This PLL Clock Buffer is designed for 2.5 V
2.5V AV
The device is a zero delay buffer that distributes a differential clock
input pair (CLK, CLK) to five differential pairs of clock outputs
(Y[0:4], Y[0:4]) and one differential pair feedback clock outputs
(FBOUT, FBOUT). The clock outputs are controlled by the input
clocks (CLK, CLK), the feedback clocks (FBIN,FBIN), and the
Analog Power input (AV
PLL is turned off and bypassed for test purposes.
The PI6CV855 is able to track Spread Spectrum Clocking to reduce
EMI.
Pin Configuration
DD
operation and differential data input and output levels.
V DDQ
V DDQ
AGND
AV DD
SSTL 2 DDR SDRAM Memory
GND
GND
CLK
CLK
Y0
Y0
Y1
Y2
Y2
Y1
PLL Clock Driver for 2.5V
DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
). When the AV
28-Pin
L
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DD
Y4
Y4
V DDQ
GND
FBOUT
FBOUT
V DDQ
FBIN
FBIN
GND
V DDQ
Y3
Y3
GND
is strapped low, the
PI6CV855
PS8545D
DDQ
02/12/08
and

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pi6cv855 Summary of contents

Page 1

... FBOUT). The clock outputs are controlled by the input clocks (CLK, CLK), the feedback clocks (FBIN,FBIN), and the Analog Power input (AV DD PLL is turned off and bypassed for test purposes. The PI6CV855 is able to track Spread Spectrum Clocking to reduce EMI. Pin Configuration GND Y0 ...

Page 2

... PI6CV855 ...

Page 3

... – – ± PI6CV855 μ PS8545D 02/12/08 ...

Page 4

... – ± PS8545D PI6CV855 ° μ 02/12/08 ...

Page 5

... – – PI6CV855 ...

Page 6

... DDQ /2 V DDQ /2 08-0030 Z = 60W R =120W Z = 60W Figure 1. IBIS Model Output Load C=14pF V DDQ /2 C=14pF V DDQ /2 Figure 2. Output Load Test Circuit 6 PI6CV855 PLL Clock Driver for 2.5V SSTL 2 DDR SDRAM Memory DDR SDRAM DDR SDRAM SCOPE PS8545D 02/12/08 ...

Page 7

... Yx, FBOUT Yx, FBOUT 08-0030 t t cycle n cycle n jit(cc) cycle n cycle n+1 Figure 3. Cycle-to-Cycle Jitter ∑ large number of samples) Figure 4. Static Phase Offset t sk(o) Figure 5. Output Skew 7 PI6CV855 PLL Clock Driver for 2.5V SSTL 2 DDR SDRAM Memory t n PS8545D 02/12/08 ...

Page 8

... Figure 6. Period Jitter t half period n half period jit(hper) half period n 2*f Figure 7. Half-Period Jitter sl(i), sl(o) sl(i), sl(o) Figure 8. Input and Output Slew Rates 8 PI6CV855 PLL Clock Driver for 2.5V SSTL 2 DDR SDRAM Memory n DDQ 80% 20% 0V PS8545D 02/12/08 ...

Page 9

... DESCRIPTION: 28-Pin, 173-Mil Wide, TSSOP PACKAGE CODE: L Package Code L Pb-free & Green, 28-pin 173-mil wide TSSOP 9 PLL Clock Driver for 2.5V SSTL 2 DDR SDRAM Memory DOCUMENT CONTROL NO 1313 REVISION: D DATE: 03/09/05 .004 0.09 0.20 .008 0.45 .018 0.75 .030 .252 BSC 6.4 Package Type PI6CV855 PS8545D 02/12/08 ...

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