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PDF CY28517 Data sheet ( Hoja de datos )
| Número de pieza | CY28517 | |
| Descripción | PCI Express Clock Generator | |
| Fabricantes | Cypress Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de CY28517 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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CY28517
PCI Express Clock Generator
Features
■ Four 100 MHz differential clocks
■ 48 MHz clock
■ Two 25 MHz clocks
■ 27 MHz Reference Clock
■ OE control per clock output
■ Selectable drive strength per output
Logic Block Diagram
OE_100_25
X1/CLK
X2
XTAL
OSC
RSET
www.DataSheet4U.com
■ Selectable, Triangle, and Lexmark profiles
■ SMbus support with readback capabilities
■ 3.3V power supply
■ Packages are Pb free and ROHS compliant
■ 28-pin TSSOP packages
100M 25M 27M 48M
x4 x2 x 1 x 1
PLL1
PLL2
27M
100MT[A:D]
100MC[A:D]
48M
SDATA
SCLK
PLL3
SMBus
Logic
25M[A:B]
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 001-42225 Rev. *A
• San Jose, CA 95134-1709 • 408-943-2600
Revised November 02, 2007
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CY28517
Byte 1: Control Register 1 (continued)
Bit @Pup
Name
2 0 Spread Control
10
0 0 100M Spread Enable
Byte 2: Control Register 2
Bit @Pup
Name
7 0 Reserved
6 0 Reserved
5 0 Reserved
4 0 Reserved
3 0 Reserved
2 0 Reserved
1 0 Reserved
0 0 Reserved
Description
B it 2
0
0
1
1
B it 1
0
1
0
1
Spread Value
-0.35 Triangular
-0.50 Triangular
-0.35 Lexmark
-0.50 Lexmark
PLL1 Spread Spectrum Enable
0 = Spread off, 1 = Spread on
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Description
Byte 3: Control Register 3
Bit @Pup
70
60
50
40
www.DataS3heet4U.com 0
20
10
00
Name
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Description
Byte 4: Control Register 4
Bit @Pup
Name
7 1 Reserved
Reserved
Description
6 1 Reserved
Reserved
5 1 Reserved
Reserved
4 1 Reserved
Reserved
3 1 Reserved
Reserved
2 1 VCO Frequency Control Must set this bit to 0 after power up to ensure proper operation of the device
1 0 Reserved
Reserved
0 0 Reserved
Reserved
Document #: 001-42225 Rev. *A
Page 5 of 12
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CY28517
Figure 6. Differential Output Signals (for AC Parameters Measurement)
TR, TF
80%
20%
VOD, VID
VOCM
VICM
VOH, VIH
VOL, VIL
Ordering Information
Part Number
Pb free
CY28517ZXC
CY28517ZXCT
Package Type
28 pin TSSOP
28 pin TSSOP – Tape and Reel
Product Flow
Commercial, 5° to 65°C
Commercial, 5° to 65°C
Package Drawing and Dimensions
Figure 7. 28-Lead Thin Shrunk Small Outline Package (4.40-mm Body) Z28.173
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PIN 1 ID
1
4.30[0.169]
4.50[0.177]
6.25[0.246]
6.50[0.256]
DIMENSIONS IN MM[INCHES] MIN.
MAX.
REFERENCE JEDEC MO-153
PACKAGE WEIGHT 0.16 gms
PART #
Z28.173 STANDARD PKG.
ZZ28.173 LEAD FREE PKG.
0.65[0.025]
BSC.
0.85[0.033]
0.95[0.037]
9.60[0.378]
9.80[0.386]
28
0.19[0.007]
0.30[0.012]
1.10[0.043] MAX.
0.05[0.002]
0.15[0.006]
0.076[0.003]
SEATING
PLANE
0.25[0.010]
BSC
GAUGE
PLANE
0° -8°
0.50[0.020]
0.70[0.027]
51-85120-*A
0.09[[0.003]
0.20[0.008]
Document #: 001-42225 Rev. *A
Page 11 of 12
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| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet CY28517.PDF ] | |
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