CY28400OXC-2T Silicon Laboratories Inc, CY28400OXC-2T Datasheet

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CY28400OXC-2T

Manufacturer Part Number
CY28400OXC-2T
Description
Clock Buffer PCIe buffer 1in 4out
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of CY28400OXC-2T

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
• Four 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
Block Diagram
SRC_STP active levels
PLL/BYPASS#
OE_1, OE_6
HIGH_BW#
PWRDWN
SRC_STP
SRCT_IN
SRCC_IN
OE_INV
SDATA
SCLK
100 MHz Differential Buffer for PCI Express and SATA
PLL
Controller
Control
Output
SMBus
DIV
Output
Buffer
DIFT2
DIFC2
DIFT5
DIFC5
DIFT6
DIFC6
DIFT1
DIFC1
Tel:(408) 855-0555
PLL/BYPASS#
Functional Description
The CY28400-2 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.
• SMBus Block/Byte/Word Read and Write support
• 3.3V operation
• PLL Bypass-configurable
• Divide by 2 programmable outputs
• 28-pin SSOP and TSSOP packages
SRCC_IN
SRCT_IN
SDATA
DIFC1
DIFC2
DIFT1
DIFT2
SCLK
OE_1
Fax:(408) 855-0550
VDD
VDD
VDD
VSS
Pin Configuration
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 SSOP/TSSOP
www.SpectraLinear.com
CY28400-2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDD_A
VSS_A
IREF
OE_INV
VDD
DIFT6
DIFC6
0E_6
DIFT5
DIFC5
VDD
HIGH_BW#
SRC_STP
PWRDWN
Page 1 of 15

Related parts for CY28400OXC-2T

CY28400OXC-2T Summary of contents

Page 1

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

Page 2

Pin Description Pin Name 2,3 SRCT_IN, SRCC_IN 6,7;9,10;20,19; DIF[T/C][2:1] & [6:5] 23,22 8,21 OE_1, OE_6 17 HIGH_BW# 15 PWRDWN 16 SRC_STP 13 SCLK 14 SDATA 26 IREF 12 PLL/BYPASS# 28 VDD_A 27 VSS_A 4 VSS 1,5,11,18,24 VDD 25 OE_INV Serial ...

Page 3

Table 2. Block Read and Block Write Protocol (continued) Block Write Protocol Bit Description 9 Write = 0 10 Acknowledge from slave 11:18 Command Code – 8 bits '00000000' stands for block operation 19 Acknowledge from slave 20:27 Byte Count ...

Page 4

Byte 0: Control Register 0 (continued) Bit @pup Name 5 0 Reserved 4 0 Reserved 3 0 Reserved 2 1 HIGH_BW PLL/BYPASS SRC_DIV2# Byte 1: Control Register 1 Bit @pup Name 7 1 Reserved 6 1 ...

Page 5

Byte 3: Control Register 3 Bit @pup Name Byte 4: Vendor ID Register Bit @Pup Name ...

Page 6

OE_INV PWRDWN PWRDWN—Assertion When the power-down pin is sampled as being asserted by two consecutive rising edges of DIFC, all DIFT outputs will be held high or tri-stated (depending on the state ...

Page 7

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 a 0.2-ms–0.3-ms delay [1] 2 Buffer waits for PWRDWN ...

Page 8

SRC_STP Deassertion All differential outputs that were stopped will resume normal operation in a glitch-free manner. The maximum latency from the deassertion to active outputs is between 2–6 DIFT/C clock periods (2 clocks are shown) with all DIFT/C outputs resuming ...

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 ...

Page 13

Switching Waveforms V = 0.525V OH VCROSS V = 0.175V OL Figure 13. Single-Ended Measurement Points for TRise and TFall V OVS V RB Figure 14. Single-ended Measurement Points for V Rev 1.0, November 21, 2006 CY28400-2 TRise (CLOCK) TFall ...

Page 14

... Skew Management Point 0.000V Figure 15. Differential (Clock-Clock#) Measurement Points (Tperiod, Duty Cycle and Jitter) Ordering Information Ordering Code Lead-free CY28400OXC-2 CY28400OXC-2T CY28400ZXC-2 CY28400ZXC-2T Package Drawing and Dimensions 28-Lead (5.3 mm) Shrunk Small Outline Package O28 Rev 1.0, November 21, 2006 T PERIOD High Duty Cycle % ...

Page 15

Thin Shrunk Small Outline Package (4.40-mm Body) Z28.173 0.65[0.025] BSC. 0.85[0.033] 0.95[0.037] 9.60[0.378] 9.80[0.386] 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 ...

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