CY28800OXCT Silicon Laboratories Inc, CY28800OXCT Datasheet

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CY28800OXCT

Manufacturer Part Number
CY28800OXCT
Description
Clock Buffer PCI Express & Sata Diff Buffer 100MHz
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of CY28800OXCT

Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Rev 1.0, November 21, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Features
• CK409 and CK410 companion buffer
• Eight differential 0.7V clock output pairs
• OE_INV input for inverting OE, PWRDWN, and
• Individual OE controls
• Low CTC jitter (< 50 ps)
• Programmable bandwidth
• SRC_STP power management control
• SMBus Block/Byte/Word Read and Write support
• 3.3V operation
• PLL Bypass-configurable
• Divide by 2 programmable
• 48-pin SSOP package
Block Diagram
SRC_STP active levels
PWRDWN
SRCT_IN
SRCC_IN
HIGH_BW#
OE_INV
SRC_STP
OE_[7:0]
PLL/BYPASS#
SDATA
SCLK
SRC_DIV2#
100-MHz Differential Buffer for PCI Express and SATA
SMBus Controller
Output Control
PLL1
DIV
Output
Buffer
Tel:(408) 855-0555
DIFC_0
DIFC_1
DIFC_2
DIFC_3
DIFC_4
DIFC_5
DIFC_6
DIFC_7
DIFT_0
DIFT_1
DIFT_2
DIFT_3
DIFT_4
DIFT_5
DIFT_6
DIFT_7
Functional Description
The CY28800 is a differential buffer and serves as a
companion device to the CK409 or CK410 clock generator.
The device is capable of distributing the Serial Reference
Clock (SRC) in PCI Express and SATA implementations.
PLL/BYPASS#
Fax:(408) 855-0550
SRC_DIV2#
SRCC_IN
SRCT_IN
SDATA
DIFCO
DIFC1
DIFC2
DIFC3
DIFT0
DIFT1
DIFT2
DIFT3
SCLK
OE_0
OE_3
OE_1
OE_2
VDD
VDD
VDD
VSS
VSS
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin Configuration
48 SSOP
www.SpectraLinear.com
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
CY28800
Page 1 of 15
VDD_A
VSS_A
IREF
LOCK
OE_7
OE_4
DIFT7
DIFC7
OE_INV
VDD
DIFT6
DIFC6
OE_6
OE_5
DIFT5
DIFC5
VSS
VDD
DIFT4
DIFC4
HIGH_BW#
SRC_STP
PWRDWN
VSS

Related parts for CY28800OXCT

CY28800OXCT Summary of contents

Page 1

Differential Buffer for PCI Express and SATA Features • CK409 and CK410 companion buffer • Eight differential 0.7V clock output pairs • OE_INV input for inverting OE, PWRDWN, and SRC_STP active levels • Individual OE controls • Low CTC ...

Page 2

Pin Description Pin 4,5 SRCT_IN, SRCC_IN 8,9;12,13;16,17;20,21; 30,29; DIF[T/C][7:0] 34,33;38,37;42,41 6,7,14,15,35,36,43,44 OE_[7:0] 28 HIGH_BW# 45 LOCK 26 PWRDWN 1 SRC_DIV2# 27 SRC_STP 23 SCLK 24 SDATA 46 IREF 22 PLL/BYPASS# 48 VDD_A 47 VSS_A 3,10,18,25,32 VSS 2,11,19,31,39 VDD 40 OE_INV ...

Page 3

Table 2. Block Read and Block Write Protocol Block Write Protocol Bit Description 1 Start 2:8 Slave address – 7 bits 9 Write = 0 10 Acknowledge from slave 11:18 Command Code – 8 bits '00000000' stands for block operation ...

Page 4

Byte 0: Control Register 0 Bit @pup Name 7 0 PWRDWN Drive Mode 6 0 SRC_STP Drive Mode 5 0 Reserved 4 0 Reserved 3 0 Reserved 2 1 HIGH_BW PLL/BYPASS SRC_DIV2# Byte 1: Control Register ...

Page 5

Byte 2: Control Register 2 (continued) Bit @pup Name 4 0 SRC_STP_DIF[T/C SRC_STP_DIF[T/C SRC_STP_DIF[T/C SRC_STP_DIF[T/C SRC_STP_DIF[T/C]0 Byte 3: Control Register 3 Bit @pup Name ...

Page 6

OE_INV Clarification The OE_INV pin is an input strap sampled at power-on. The functionality of this input is to set the active level polarities for OE_[7:0], PWRDWN, and SRC_STP input pins. ‘Active High’ indicates the functionality of the input is ...

Page 7

PWRDWN DIFT DIFC Figure 4. PWRDWN Deassertion Diagram, OE_INV = 1 Table 4. Buffer Power-up State Machine State 0 3.3V Buffer power off 1 After 3.3V supply is detected to rise above 1.8V–2.0V, the buffer enters state 1 and initiates ...

Page 8

SRC_STP Assertion The impact of asserting the SRC_STP pin is that all DIF outputs that are set in the control registers to stoppable via assertion of SRC_STP are stopped after their next transition. When the control register SRC_STP three-state bit ...

Page 9

SRC_STP PWRDWN DIFT(Free Running DIFC(Free Running DIFT (Stoppable) DIFC (Stoppable) Figure 9. SRC_STP = Driven, PWRDWN = Driven, OE_INV = 1 SRC_STP PWRDWN DIFT(Free Running DIFC(Free Running DIFT (Stoppable) DIFC (Stoppable) Figure 10. SRC_STP = Tri-state, PWRDWN = Driven, OE_INV ...

Page 10

OE Assertion All differential outputs that were tri-stated will resume normal operation in a glitch-free manner. The maximum latency from the assertion to active outputs is between 2–6 DIF clock periods. In addition, DIFT clocks will be driven high within ...

Page 11

Absolute Maximum Conditions Parameter Description V Core Supply Voltage DD V Analog Supply Voltage DD_A V Input Voltage IN T Temperature, Storage S T Temperature, Operating Ambient A T Temperature, Junction J ESD ESD Protection (Human Body Model) HBM UL-94 ...

Page 12

AC Electrical Specifications (continued)(Measured in High Bandwidth Mode) Parameter Description ΔV Vcross Variation over all edges OX V Differential Ringback Voltage RB T Time before ringback allowed STABLE V Absolute maximum input voltage MAX V Absolute minimum input voltage MIN ...

Page 13

Switching Waveforms V = 0.525V OH VCROSS V = 0.175V OL Figure 13. Single-Ended Measurement Points for TRise and TFall Figure 14. Single-ended Measurement Points for V Rev 1.0, November 21, 2006 CY28800 TRise (CLOCK) ...

Page 14

Skew Management Point 0.000V Figure 15. Differential (Clock-Clock#) Measurement Points (Tperiod, Duty Cycle and Jitter) Rev 1.0, November 21, 2006 T PERIOD High Duty Cycle % CY28800 Low Duty Cycle % Page ...

Page 15

... Ordering Code Lead Free CY28800OXC CY28800OXCT Package Drawing and Dimensions While SLI has reviewed all information herein for accuracy and reliability, Spectra Linear Inc. assumes no responsibility for the use of any cir- cuitry or for the infringement of any patents or other rights of third parties which would result from each use. This product is intended for use in ...

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