VDD_ANA

LDO

VBAT

MCLK_IN

VLDO

REQ1

CLK1

REQ2

CLK2

REQ3

CLK3

VDD_DIG

I C

2

Control

Register

ADR_A0

MCLK_REQ

SCLH

SDAH

GND_ANA

GND_DIG

RESET

Reset

REQ4

CLK4

Decoder

1

2

D

C

A

WCSP

B

TopView

(SolderBallUnderneath)

3

4

E

CLK1

CLK2

REQ1

CLK3

CLK4

REQ3

GND_

DIG

VLDO

REQ4

REQ2

ADR_

A0

VDD_

DIG

MCLK_

IN

MCLK_

REQ

RESET

VDD_

ANA

GND_

ANA

SCLH

VBAT

SDAH

CDC3S04

www.ti.com

SCAS883B

– OCTOBER 2009 – REVISED MAY 2011

Quad Sine-Wave Clock Buffer With LDO

Check for Samples: CDC3S04

1

FEATURES

DESCRIPTION

The CDC3S04 is a four-channel low-power low-jitter

•

1:4 Low-Jitter Clock Buffer

sine-wave clock buffer. It can be used to buffer a

•

Single-Ended Sine-Wave Clock Input and

single master clock to multiple peripherals. The four

Outputs

sine-wave outputs (CLK1

–CLK4) are designed for

•

Ultralow Phase Noise and Standby Current

minimal

channel-to-channel

skew

and

ultralow

additive output jitter.

•

Individual Clock Request Inputs for Each

Output

Each output has its own clock request inputs which

enables the dedicated clock output. These clock

•

On-Chip Low-Dropout Output (LDO) for

requests are active-high (can also be changed to be

Low-Noise TCXO Supply

•

that can be sent back to the master clock to request

High-Speed Mode, 3.4 Mbit/s)

the

clock

(MCLK_REQ).

MCKL_REQ

is

an

•

1.8-V Device Power Supply

open-source output and supports the wired-OR

function (default mode). It needs an external pulldown

•

Wide Temperature Range,

–30°C to 85°C

resistor. MCKL_REQ can be changed to wired-AND

•

ESD Protection: 2 KV HBM, 750 V CDM, and

100 V MM

The

CDC3S04

also

provides

an

interface

•

Small 20-Pin Chip-Scale Package: 0.4-mm

(Hs-mode) that can be used to enable or disable the

Pitch WCSP (1.6 mm

× 2 mm)

outputs, select the polarity of the REQ inputs, and

allow control of internal decoding.

APPLICATIONS

The CDC3S04 features an on-chip high-performance

•

Cellular Phones

LDO that accepts voltages from 2.3 V to 5.5 V and

•

Smart Phones

outputs a 1.8-V supply. This 1.8-V supply can be

used to power an external 1.8-V TCXO. It can be

•

Mobile Handsets

enabled or disabled for power saving at the TCXO.

•

Portable Systems

•

Wireless Modems Including GPS, WLAN,

W-BT, D-TV, DVB-H, FM Radio, WiMAX, and

System Clock

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2009–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.