W134M_05 [CYPRESS]

Direct Rambus⑩ Clock Generator; 直接Rambus ™时钟发生器


型号：	W134M_05
厂家：	CYPRESS
描述：	Direct Rambus⑩ Clock Generator 直接Rambus ™时钟发生器时钟发生器
文件：	总12页 (文件大小：208K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

W134M/W134S

Direct Rambus™ Clock Generator

Features

Description

• Differential clock source for Direct Rambus™ memory

subsystem for up to 800-MHz data transfer rate

The Cypress W134M/W134S provides the differential clock

signals for a Direct Rambus memory subsystem. It includes

signals to synchronize the Direct Rambus Channel clock to an

external system clock but can also be used in systems that do

not require synchronization of the Rambus clock.

• Provide synchronization flexibility: the Rambus^®

Channel can optionally be synchronous to an external

system or processor clock

• Power-managed output allows Rambus Channel clock

to be turned off to minimize power consumption for

mobile applications

• WorkswithCypressCY2210, W133, W158, W159, W161,

and W167 to support Intel^®architecture platforms

• Low-power CMOS design packaged in a 24-pin QSOP

(150-mil SSOP) package

Block Diagram

Pin Configuration

REFCLK

MULT0:1

VDDIR

REFCLK

VDD

GND

PCLKM

SYNCLKN

GND

VDD

GND

CLK

PLL

CLKB

GND

VDD

MULT0

MULT1

GND

CLK

Output

Logic

Phase

PCLKM

CLKB

Alignment

VDD

SYNCLKN

VDDIPD

STOPB

PWRDNB

Test

S0:1

Logic

STOPB

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose, CA 95134

•

408-943-2600

Document #: 38-07426 Rev. *C

Revised June 1, 2005

W134M/W134S

Pin Definitions

Pin Name

No.

Type

Description

REFCLK

Reference Clock Input. Reference clock input, normally supplied by a system frequency

synthesizer (Cypress W133).

PCLKM

Phase Detector Input. The phase difference between this signal and SYNCLKN is used

to synchronize the Rambus Channel Clock with the system clock. Both PCLKM and

SYNCLKN are provided by the Gear Ratio Logic in the memory controller. If Gear Ratio

Logic is not used, this pin would be connected to Ground.

Phase Detector Input. The phase difference between this signal and PCLKM is used to

synchronize the Rambus Channel Clock with the system clock. Both PCLKM and

SYNCLKN are provided by the Gear Ratio Logic in the memory controller. If Gear Ratio

Logic is not used, this pin would be connected to Ground.

SYNCLKN

STOPB

Clock Output Enable. When this input is driven to active LOW, it disables the differential

Rambus Channel clocks.

PWRDNB

MULT 0:1

Active LOW Power-down. When this input is driven to active LOW, it disables the differ-

ential Rambus Channel clocks and places the W134M/W134S in power-down mode.

15, 14

PLL Multiplier Select. These inputs select the PLL prescaler and feedback dividers to

determine the multiply ratio for the PLL for the input REFCLK.

W134S

W134M

PLL/REFCLK

MULT0

MULT1

4.5

5.333

CLK, CLKB

S0, S1

20, 18

24, 23

Complementary Output Clock. Differential Rambus Channel clock outputs.

Mode Control Input. These inputs control the operating mode of the W134M/W134S.

MODE

Normal

Output Enable Test

Bypass

Test

VDDIR

VDDIPD

–

No Connect

RefV Reference for REFCLK. Voltage reference for input reference clock.

RefV Reference for Phase Detector. Voltage reference for phase detector inputs and StopB.

VDD

3, 9, 16, 22

Power Connection. Power supply for core logic and output buffers. Connected to 3.3V

supply.

GND

4, 5, 8, 13, 17,

Ground Connection. Connect all ground pins to the common system ground plane.

W134M/W134S

W133

W158

W159

W161

W167

Refclk

Phase

PLL

Busclk

Align

CY2210

RAC

RMC

Pclk

DLL

Synclk

Gear

Ratio

Logic

Figure 1. DDLL System Architecture

Document #: 38-07426 Rev. *C

Page 2 of 12

W134M/W134S

(Rambus Channel). At the mid-point of the channel, the RAC

senses Busclk using its own DLL for clock alignment, followed

by a fixed divide-by-4 that generates Synclk.

Key Specifications

Supply Voltage:...................................... V_DD= 3.3V±0.165V

Operating Temperature: ...................................0°C to +70°C

Input Threshold:.................................................. 1.5V typical

Maximum Input Voltage: ........................................V_DD+0.5V

Maximum Input Frequency: .....................................100 MHz

Output Duty Cycle:...................................40/60% worst case

Output Type: ...........................Rambus signaling level (RSL)

Pclk is the clock used in the memory controller (RMC) in the

core logic, and Synclk is the clock used at the core logic

interface of the RAC. The DDLL together with the Gear Ratio

Logic enables users to exchange data directly from the Pclk

domain to the Synclk domain without incurring additional

latency for synchronization. In general, Pclk and Synclk can

be of different frequencies, so the Gear Ratio Logic must

select the appropriate M and N dividers such that the

frequencies of Pclk/M and Synclk/N are equal. In one inter-

esting example, Pclk = 133 MHz, Synclk = 100 MHz, and

M = 4 while N = 3, giving Pclk/M = Synclk/N = 33 MHz. This

example of the clock waveforms with the Gear Ratio Logic is

shown in Figure 2.

DDLL System Architecture and Gear Ratio

Logic

Figure 1 shows the Distributed Delay Lock Loop (DDLL)

system architecture, including the main system clock source,

the Direct Rambus clock generator (DRCG), and the core logic

that contains the Rambus Access Cell (RAC), the Rambus

Memory Controller (RMC), and the Gear Ratio Logic. (This

diagram abstractly represents the differential clocks as a

single Busclk wire.)

The output clocks from the Gear Ratio Logic, Pclk/M, and

Synclk/N, are output from the core logic and routed to the

DRCG Phase Detector inputs. The routing of Pclk/M and

Synclk/N must be matched in the core logic as well as on the

board.

After comparing the phase of Pclk/M vs. Synclk/N, the DRCG

Phase Detector drives a phase aligner that adjusts the phase

of the DRCG output clock, Busclk. Since everything else in the

distributed loop is fixed delay, adjusting Busclk adjusts the

phase of Synclk and thus the phase of Synclk/N. In this

manner the distributed loop adjusts the phase of Synclk/N to

match that of Pclk/M, nulling the phase error at the input of the

DRCG Phase Detector. When the clocks are aligned, data can

be exchanged directly from the Pclk domain to the Synclk

domain.

The purpose of the DDLL is to frequency-lock and phase-align

the core logic and Rambus clocks (Pclk and Synclk) at the

RMC/RAC boundary in order to allow data transfers without

incurring additional latency. In the DDLL architecture, a PLL is

used to generate the desired Busclk frequency, while a

distributed loop forms a DLL to align the phase of Pclk and

Synclk at the RMC/RAC boundary.

The main clock source drives the system clock (Pclk) to the

core logic, and also drives the reference clock (Refclk) to the

DRCG. For typical Intel architecture platforms, Refclk will be

half the CPU front side bus frequency. A PLL inside the DRCG

multiplies Refclk to generate the desired frequency for Busclk,

and Busclk is driven through a terminated transmission line

Table 1 shows the combinations of Pclk and Busclk

frequencies of greatest interest, organized by Gear Ratio.

Table 1. Supported Pclk and Busclk Frequencies, by Gear Ratio

Gear Ratio and Busclk

Pclk

2.0

1.5

1.33

1.0

67 MHz

267 MHz

100 MHz

133 MHz

150 MHz

200 MHz

300 MHz

400 MHz

267 MHz

400 MHz

356 MHz

400 MHz

Pclk

Synclk

Pclk/M =

Synclk/N

Figure 2. Gear Ratio Timing Diagram

Document #: 38-07426 Rev. *C

Page 3 of 12

W134M/W134S

StopB

S0/S1

W134M/W134S

W133

W158

W159

W161

W167

Refclk

Phase

PLL

Busclk

Align

CY2210

RAC

RMC

Pclk

DLL

Synclk

Gear

Ratio

Logic

Figure 3. DDLL Including Details of DRCG

Figure 3 shows more details of the DDLL system architecture,

Table 2. PLL Divider Selection

W134M

including the DRCG output enable and bypass modes.

W134S

Phase Detector Signals

Mult0

Mult1

The DRCG Phase Detector receives two inputs from the core

logic, PclkM (Pclk/M) and SynclkN (Synclk/N). The M and N

dividers in the core logic are chosen so that the frequencies of

PclkM and SynclkN are identical. The Phase Detector detects

the phase difference between the two input clocks, and drives

the DRCG Phase Aligner to null the input phase error through

the distributed loop. When the loop is locked, the input phase

error between PclkM and SynclkN is within the specification

Table 3 shows the logic for enabling the clock outputs, using

the StopB input signal. When StopB is HIGH, the DRCG is in

its normal mode, and Clk and ClkB are complementary outputs

following the Phase Aligner output (PAclk). When StopB is

LOW, the DRCG is in the Clk Stop mode, the output clock

drivers are disabled (set to Hi-Z), and the Clk and ClkB settle

to the DC voltage V_X,STOPas given in the Device Character-

istics table. The level of V_X,STOPis set by an external resistor

network.

_ERR,PDgiven in the Device Characteristics table after the lock

time given in the State Transition Section.

The Phase Detector aligns the rising edge of PclkM to the

rising edge of SynclkN. The duty cycle of the phase detector

input clocks will be within the specification DC_IN,PDgiven in the

Operating Conditions table. Because the duty cycles of the two

phase detector input clocks will not necessarily be identical,

the falling edges of PclkM and SynclkN may not be aligned

when the rising edges are aligned.

Table 3. Clock Stop Mode Selection

The voltage levels of the PclkM and SynclkN signals are deter-

mined by the controller. The pin VDDIPD is used as the voltage

reference for the phase detector inputs and should be

connected to the output voltage supply of the controller. In

some applications, the DRCG PLL output clock will be used

directly, by bypassing the Phase Aligner. If PclkM and SynclkN

are not used, those inputs must be grounded.

Mode

Normal

Clk Stop

StopB

Clk

PAclk

V_X,STOP

ClkB

PAclkB

V_X,STOP

Table 4 shows the logic for selecting the Bypass and Test

modes. The select bits, S0 and S1, control the selection of

these modes. The Bypass mode brings out the full-speed PLL

output clock, bypassing the Phase Aligner. The Test mode

brings the Refclk input all the way to the output, bypassing

both the PLL and the Phase Aligner. In the Output Test mode

(OE), both the Clk and ClkB outputs are put into a

high-impedance state (Hi-Z). This can be used for component

testing and for board-level testing.

Selection Logic

Table 2 shows the logic for selecting the PLL prescaler and

feedback dividers to determine the multiply ratio for the PLL

from the input Refclk. Divider A sets the feedback and divider

B sets the prescaler, so the PLL output clock frequency is set

by: PLLclk = Refclk*A/B.

Document #: 38-07426 Rev. *C

Page 4 of 12

W134M/W134S

and S1 must be stable before power is applied to the device,

and can only be changed in Power-down mode (PwrDnB = 0).

The reference inputs, V_DDRand V_DDPD, may remain on or may

be grounded during the Power-down mode.

Table 4. Bypass and Test Mode Selection

Bypclk

Mode

Normal

(int.)

Gnd

–

Clk

PAclk

Hi-Z

ClkB

PAclkB

Hi-Z

Table 6. Examples of Frequencies, Dividers, and Gear Ratios

Output Test (OE)

Bypass

Test

Pclk Refclk Busclk Synclk A B M N Ratio F@PD

PLLclk PLLclk PLLclkB

Refclk Refclk RefclkB

267

300

400

267

400

100

8 1 2 2 1.0

6 1 8 6 1.33

8 1 4 4 1.0

4 1 4 2 2.0

6 1 8 6 1.33

12.5

16.7

100

133

Table 5 shows the logic for selecting the Power-down mode,

using the PwrDnB input signal. PwrDnB is active LOW

(enabled when 0). When PwrDnB is disabled, the DRCG is in

its normal mode. When PwrDnB is enabled, the DRCG is put

into a powered-off state, and the Clk and ClkB outputs are

three-stated.

100

The control signals Mult0 and Mult1 can be used in two ways.

If they are changed during Power-down mode, then the

Power-down transition timings determine the settling time of

the DRCG. However, the Mult0 and Mult1 control signals can

also be changed during Normal mode. When the Mult control

signals are “hot-swapped” in this manner, the Mult transition

timings determine the settling time of the DRCG.

Table 5. Power-down Mode Selection

Mode

Normal

PwrDnB

Clk

PAclk

ClkB

PAclkB

GND

Power-down

GND

In Normal mode, the clock source is on, and the output is

Table of Frequencies and Gear Ratios

enabled.

Table 6 shows several supported Pclk and Busclk

frequencies, the corresponding A and B dividers required in

the DRCG PLL, and the corresponding M and N dividers in the

gear ratio logic. The column Ratio gives the Gear Ratio as

defined Pclk/Synclk (same as M and N). The column F@PD

gives the divided down frequency (in MHz) at the Phase

Detector, where F@PD = Pclk/M = Synclk/N.

Table 7 lists the control signals for each state.

Table 7. Control Signals for Clock Source States

Clock

Output

State

Power-down

Clock Stop

Normal

PwrDnB

StopB

Source

Buffer

OFF

Ground

Disabled

Enabled

State Transitions

The clock source has three fundamental operating states.

Figure 4 shows the state diagram with each transition labelled

A through H. Note that the clock source output may NOT be

glitch-free during state transitions.

Upon powering up the device, the device can enter any state,

depending on the settings of the control signals, PwrDnB and

StopB.

Figure 5 shows the timing diagrams for the various transitions

between states, and Table 8 specifies the latencies of each

state transition. Note that these transition latencies assume

the following.

Refclk input has settled and meets specification shown in the

Operating Conditions table.

The Mult0, Mult1, S0 and S1 control signals are stable.

In Power-down mode, the clock source is powered down with

the control signal, PwrDnB, equal to 0. The control signals S0

VDD Turn-On

Test

Normal

VDD Turn-On

Power-Down

Clk Stop

Figure 4. Clock Source State Diagram

Document #: 38-07426 Rev. *C

Page 5 of 12

W134M/W134S

Timing Diagrams

Power-down Exit and Entry

PwrDnB

Clk/ClkB

POWERDN

POWERUP

Output Enable Control

STOP

StopB

CLKON

CLKOFF

CLKSETL

Clk/ClkB

Output clock

not specified

glitches may

occur

Clock output settled within

50 ps of the phase before

disabled

Clock enabled

and glitch-free

Figure 5. State Transition Timing Diagrams

Mult0 and/or Mult1

Clk/ClkB

t_MULT

Figure 6. Multiply Transition Timing

Table 8. State Transition Latency Specifications

Transition Latency

Transition

From

Parameter

Max.

Description

Power-down

Normal

t_POWERUP

3 ms

Time from PwrDnB to Clk/ClkB output settled

(excluding t_DISTLOCK).

Power-down

Clk Stop

Test

t_POWERUP

t_MULT

3 ms

1 ms

Time from PwrDnB until the internal PLL and clock has

turned ON and settled.

Time from PwrDnB to Clk/ClkB output settled

(excluding t_DISTLOCK).

V_DDON

Normal

Clk Stop

Test

Time from V_DDis applied and settled until Clk/ClkB

output settled (excluding t_DISTLOCK).

Time from V_DDis applied and settled until internal PLL

and clock has turned ON and settled.

Time from V_DDis applied and settled until internal PLL

and clock has turned ON and settled.

Normal

Time from when Mult0 or Mult1 changed until Clk/ClkB

output resettled (excluding t_DISTLOCK).

Document #: 38-07426 Rev. *C

Page 6 of 12

W134M/W134S

Table 8. State Transition Latency Specifications (continued)

Transition Latency

Transition

From

Parameter

Max.

Description

Clk Stop

Normal

t_CLKON

10 ns Time from StopB until Clk/ClkB provides glitch-free

clock edges.

Clk Stop

Normal

t_CLKSETL20 cycles Time from StopB to Clk/ClkB output settled to within 50

ps of the phase before CLK/CLKB was disabled.

Normal

Test

Clk Stop

Normal

t_CLKOFF

t_CTL

5 ns

3 ms

Time from StopB to Clk/ClkB output disabled.

Time from when S0 or S1 is changed until CLK/CLKB

output has resettled (excluding t_DISTLOCK).

Normal

Test

t_CTL

3 ms

1 ms

Time from when S0 or S1 is changed until CLK/CLKB

output has resettled (excluding t_DISTLOCK).

Time from PwrDnB to the device in Power-down.

B,D

Normal or Clk Stop Power-down t_POWERDN

Figure 5 shows that the Clk Stop to Normal transition goes

through three phases. During t_CLKON, the clock output is not

specified and can have glitches. For t_CLKON< t < t_CLKSETL, the

clock output is enabled and must be glitch-free. For

t > t_CLKSETL, the clock output phase must be settled to within

50 ps of the phase before the clock output was disabled. At

this time, the clock output must also meet the voltage and

timing specifications of the Device Characteristics table. The

outputs are in a high-impedance state during the Clk Stop

mode.

Table 9. Distributed Loop Lock Time Specification

Parameter

Description

Min.

Max.

Unit

t_DISTLOCKTime from when Clk/ClkB output is settled to when the phase error between SynclkN and

PclkM falls within the t_ERR,PDspec in Table .

Table 10.Supply and Reference Current Specification

Parameter

I_POWERDOWN

I_CLKSTOP

I_NORMAL

I_REF,PWDN

I_REF,NORM

Description

Min.

Max.

250

100

Unit

µA

“Supply” current in Power-down state (PwrDnB 1 = 0)

“Supply” current in Clk Stop state (StopB = 0)

“Supply” current in Normal state (StopB = 1, PwrDnB = 1)

Current at VDDIR or VDDIPD reference pin in Power-down state (PwrDnB = 0)

Current at VDDIR or VDDIPD reference pin in Normal or Clk Stop state (PwrDnB = 1)

–

Document #: 38-07426 Rev. *C

Page 7 of 12

W134M/W134S

Absolute Maximum Conditions^[1]

Parameter

V_{DD, ABS}

V_{I, ABS}

Description

Max. voltage on V_DDwith respect to ground

Max. voltage on any pin with respect ground

Min.

–0.5

Max.

4.0

V_DD+ 0.5

Unit

External Component Values^[2]

Parameter

Description

Min.

Max.

±5%

Unit

Ω

R_S

Serial Resistor

R_P

C_F

C_MID

Parallel Resistor

Edge Rate Filter Capacitor

AC Ground Capacitor

±5%

±10%

0.1 µF

Ω

4–15^[3]

470 pF

±20%

Operating Conditions^[4]

Parameter

V_DD

T_A

Description

Min.

3.135

Max.

3.465

Unit

°C

Supply Voltage

Ambient Operating Temperature

t_CYCLE,IN

t_J,IN

Refclk Input Cycle Time

–

250

%t_CYCLE

kHz

Input Cycle-to-Cycle Jitter^[5]

DC_IN

FM_IN

PM_IN

Input Duty Cycle over 10,000 Cycles

Input Frequency of Modulation

[6]

Modulation Index for Triangular Modulation

Modulation Index for Non-Triangular Modulation

Phase Detector Input Cycle Time at PclkM & SynclkN

Initial Phase error at Phase Detector Inputs

Phase Detector Input Duty Cycle over 10,000 Cycles

0.6

0.5^[8]

100

0.5

–

t_CYCLE,PD

t_ERR,INIT

DC_IN,PD

t_I,SR

–0.5

t_CYCLE,PD

V/ns

Input Slew Rate (measured at 20%-80% of input voltage) for PclkM,

SynclkN, and Refclk

C_IN,PD

DC_IN,PD

C_IN,CMOS

Input Capacitance at PclkM, SynclkN, and Refclk^[7]

Input Capacitance matching at PclkM and SynclkN^[7]

–

0.5

Input Capacitance at CMOS pins (excluding PclkM, SynclkN, and

Refclk)^[7]

V_IL

V_IH

Input (CMOS) Signal Low Voltage

Input (CMOS) Signal High Voltage

Refclk input Low Voltage

–

0.7

–

0.7

–

0.7

1.235

0.3

–

0.3

–

0.3

–

3.465

2.625

VDD

V_DDIR

V_DDIPD

V_IL,R

V_IH,R

V_IL,PD

V_IH,PD

V_DDIR

V_DDIPD

Refclk input High Voltage

Input Signal Low Voltage for PD Inputs and StopB

Input Signal High Voltage for PD Inputs and StopB

Input Supply Reference for Refclk

Input Supply Reference for PD Inputs

Notes:

1. Represents stress ratings only, and functional operation at the maximums is not guaranteed.

2. Gives the nominal values of the external components and their maximum acceptable tolerance, assuming Z = 28Ω.

3. Do not populate C . Leave pads for future use.

4. Multiple Supplies: The voltage on any input or I/O pin cannot exceed the power pin during power-up. Power supply sequencing is NOT required.

5. Refclk jitter measured at V (nom)/2.

DDIR

6. If input modulation is used: input modulation is allowed but not required.

7. Capacitance measured at Freq=1 MHz, DC bias = 0.9V and V < 100 mV.

8. The amount of allowed spreading for any non-triangular modulation is determined by the induced downstream tracking skew, which cannot exceed the skew

generated by the specified 0.6% triangular modulation. Typically, the amount of allowed non-triangular modulation is about 0.5%.

Document #: 38-07426 Rev. *C

Page 8 of 12

W134M/W134S

Device Characteristics

Parameter

t_CYCLE

Description

Min.

2.5

–

Max.

3.75

100

160

–

Unit

Clock Cycle Time

t_J

Cycle-to-Cycle Jitter at Clk/ClkB^[9]

Total Jitter over 2, 3, or 4 Clock Cycles^[9]

266-MHz Cycle-to-Cycle Jitter^[10]

266-MHz Total Jitter over 2, 3, or 4 Clock Cycles^[10]

Phase Aligner Phase Step Size (at Clk/ClkB)

–

t_STEP

t_ERR,PD

Phase Detector Phase Error for Distributed Loop Measured at

–100

100

PclkM-SynclkN (rising edges) (does not include clock jitter)

t_ERR,SSC

V_X,STOP

V_X

V_COS

V_OH

V_OL

r_OUT

I_OZ

I_OZ,STOP

PLL Output Phase Error when Tracking SSC

Output Voltage during Clk Stop (StopB=0)

Differential Output Crossing-Point Voltage

Output Voltage Swing (p-p single-ended)^[11]

Output High Voltage

–100

1.1

1.3

0.4

–

1.0

–

250

–

100

2.0

1.8

0.6

2.0

–

500

Output Low voltage

Output Dynamic Resistance (at pins)^[12]

Output Current during Hi-Z (S0 = 0, S1 = 1)

Output Current during Clk Stop (StopB = 0)

Output Duty Cycle over 10,000 Cycles

Output Cycle-to-Cycle Duty Cycle Error

Output Rise and Fall Times (measured at 20%–80% of output voltage)

Ω

µA

%t_CYCLE

t_DC,ERR

t_R,t_F

t_CR,CF

500

100

Difference between Output Rise and Fall Times on the Same Pin of a

Single Device (20%–80%)

Notes:

9. Output Jitter spec measured at t

10. Output Jitter Spec measured at t

= 2.5 ns.

CYCLE

= 3.75 ns.

11. V

= V –V

OH OL.

COS

12. r

= DV / D I . This is defined at the output pins.

O O

OUT

Document #: 38-07426 Rev. *C

Page 9 of 12

W134M/W134S

Layout Example

+3.3V Supply

10 µF

C4^{0.005 µF}

VDDIR

VDDIPD

Internal Power Supply Plane

FB = Dale ILB1206 - 300 (300Ω @ 100 MHz)

= VIA to GND plane layer

All Bypass cap = 0.1 Ceramic XR7

Ordering Information

Ordering Code

Package Type

W134MH

24-pin QSOP (150 mils, SSOP)

W134MHT

W134SH

24-pin QSOP (150 mils, SSOP) – Tape and Reel

24-pin QSOP (150 mils, SSOP)

W134SHT

24-pin QSOP (150 mils, SSOP) – Tape and Reel

Lead-free

CYW134MOXC

CYW134MOXCT

CYW134SOXC

CYW134SOXCT

24-pin QSOP (150 mils, SSOP)

24-pin QSOP (150 mils, SSOP), Tape and Reel

24-pin QSOP (150 mils, SSOP)

24-pin QSOP (150 mils, SSOP), Tape and Reel

Document #: 38-07426 Rev. *C

Page 10 of 12

W134M/W134S

Package Diagram

24-Lead Quarter Size Outline Q13

51-85055-*B

Direct Rambus is a trademark and Rambus is a registered trademark of Rambus Inc. Intel is a registered trademark of Intel

Corporation. All product and company names mentioned in this document may be the trademarks of their respective holders.

Document #: 38-07426 Rev. *C

Page 11 of 12

of any circuitry other than circuitry embodied in a Cypress product. Nor does it convey or imply any license under patent or other rights. Cypress products are not warranted nor intended to be

used for medical, life support, life saving, critical control or safety applications, unless pursuant to an express written agreement with Cypress. Furthermore, Cypress does not authorize its

products for use as critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Cypress

products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress against all charges.

W134M/W134S

Document History Page

Document Title: W134M/W134S Direct Rambus™ Clock Generator

Document Number: 38-07426

Orig. of

REV.

ECN NO. Issue Date Change

Description of Change

Change from Spec number: 38-00822 to 38-07246

Add power-up requirements to operating information

Added Lead-free to the W134M device in the ordering information table

Corrected the lead-free coding

115531

122927

131671

375120

05/10/02

12/14/02

12/15/03

See ECN

DSG

RBI

RGL

Document #: 38-07426 Rev. *C

Page 12 of 12

W134M_05 [CYPRESS]

相关型号：

W134S

W134SH

W134SHT

W134SSQC

W134SSQCT

W137

W137

W137H

W137HT

W137HT

W137XT

W1384AD/GD