pi6c180 Pericom Semiconductor Corporation, pi6c180 Datasheet

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pi6c180

Manufacturer Part Number
pi6c180
Description
3.3v, 100mhz Desktop Pc 1 18 Output Clock Driver
Manufacturer
Pericom Semiconductor Corporation
Datasheet
Features
• High-speed, to 100 MHz
• Low-noise non-inverting 1-18 buffer
• Supports up to four SDRAM DIMMs
• Low skew (< 250ps) between any two output clocks
• I
• Multiple V
• 3.3V power supply voltage
• Separate Hi-Z pin for testing
• Packaging:
Block Diagram
- 48-pin SSOP (V)
2
C Serial Configuration interface
BUF_IN
DD
SCLOCK
, V
SDATA
SS
OE
pins for noise reduction
I 2 C
I/O
SDRAM0
SDRAM1
SDRAM2
SDRAM3
SDRAM17
1
Description
The PI6C180, a high-speed low-noise 1-18 non-inverting buffer
designed for SDRAM clock buffer applications operates up to
100 MHz.
At power up all SDRAM output are enabled and active. The I
Serial control may be used to individually activate/deactivate any
of the 18 output drivers.
The output enable (OE) pin may be pulled low to put all outputs
in a Hi-Z state.
Note:
Purchase of I
use them in an I
Pin Configuration
SDRAM16
SDRAM2
SDRAM3
SDRAM6
SDRAM7
SDRAM0
SDRAM1
SDRAM4
SDRAM5
2
BUF_IN
C components from Pericom conveys a license to
SDATA
V
2
V
V
V
V
V
V
V
V
C system as defined by Philips.
V
V
DDIIC
DD1
DD3
DD4
DD0
DD2
SS0
SS1
SS3
NC
NC
SS2
SS4
Precision 1-18 Clock Buffer
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
NC
NC
V
SDRAM15
SDRAM14
V
V
SDRAM13
SDRAM12
V
OE
V
SDRAM11
SDRAM10
V
V
SDRAM9
SDRAM8
V
V
SDRAM17
V
V
SCLOCK
DD9
SS9
DD8
SS8
DD7
SS7
DD6
SS6
DD5
SS5
SSIIC
PS8141F
PI6C180
12/13/04
2
C

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pi6c180 Summary of contents

Page 1

... OE SDATA I/O SCLOCK Description The PI6C180, a high-speed low-noise 1-18 non-inverting buffer designed for SDRAM clock buffer applications operates up to 100 MHz. At power up all SDRAM output are enabled and active. The I Serial control may be used to individually activate/deactivate any of the 18 output drivers. The output enable (OE) pin may be pulled low to put all outputs in a Hi-Z state ...

Page 2

... A0 R Note: 1. Inactive means outputs are held LOW and are disabled from switching. 2 Precision 1-18 Clock Buffer Description 2 C circuitry Pin Description 18 SDRAM7 (Active/Inactive) 17 SDRAM6 (Active/Inactive) 14 SDRAM5 (Active/Inactive) 13 SDRAM4 (Active/Inactive) 9 SDRAM3 (Active/Inactive) 8 SDRAM2 (Active/Inactive) 5 SDRAM1 (Active/Inactive) 4 SDRAM0 (Active/Inactive) PI6C180 PS8141F 12/13/04 ...

Page 3

... The I C interface permits individual enable/disable of each clock output and test mode enable. The PI6C180 is a slave receiver device. It can not be read back. Sub addressing is not supported. All preceding bytes must be sent in order to change one of the control bytes. Every bite put on the SDATA line must be 8-bits long (MSB first), fol- lowed by an acknowledge bit generated by the receiving device ...

Page 4

... Parameter (1) (1) 4 Precision 1-18 Clock Buffer Min. Typ. Max. 2 -0.3 0 2.4 0 Min. Typ. -54 54 1.5 1.5 66 MHz 100 MHz Min. Max. Min. Max. 1.5 4.0 1.5 1.5 4.0 1.5 1.0 5.0 1.0 1.0 5.0 1.0 1.0 8.0 1.0 1.0 8.0 1 250 250 PI6C180 Units +0 °C Max. Units - V/ns 4 Units 4.0 V/ns 4.0 5.0 5.0 ns 8.0 8 PS8141F 12/13/04 ...

Page 5

... Route clock traces over a continuous ground plane or over a continuous power plane. Avoid routing clock traces from plane to plane (refer to rule #2). 4. Position clock signals away from signals that go to any cables or any external connectors. 5 Precision 1-18 Clock Buffer Test Point tSDKL 1.5V t phl 1.5V PI6C180 PS8141F 12/13/04 ...

Page 6

... VDD VSS VDD VSS VDD VSS 23 26 VSS 24 25 SDRAM DIMM CI Spec. 6 Precision 1-18 Clock Buffer Ferrite Bead VCC C12 22uF Via to GND Plane Via to VDD Plane Void in Power Plane . DD PS8141F PI6C180 12/13/04 ...

Page 7

... Gauge Plane .620 .630 15.75 .008 16.00 0.20 Nom. .008 0.20 .025 BSC .0135 0.34 0.635 Package Code V 48-pin SSOP V Pb-free and Green 48-pin SSOP 7 Precision 1-18 Clock Buffer .010 0.25 .02 0.51 .04 1.01 .015 0.381 x 45˚ 0.635 .025 .110 2.79 .008 0.20 0-8˚ .016 0.40 Package Type PI6C180 Max PS8141F 12/13/04 ...

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