SL38000ZCT Datasheet SL38000ZC, SL38000ZI, SL38000ZCT | P1-P3

Rev 1.1, August 7, 2008 Page 1 of 12

400 West Cesar Chavez, Austin, TX 78701 1+(512) 416-8500 1+(512) 416-9669 www.silabs.com

SL38000

Key Features

• 4 Programmable PLLs with up to 9 Clock Outputs

and 2 REFCLKs

• Wide 2.5V to 3.3V +/-10% power supply range

• CLKOUTs support 3.3V to 2.5V or 1.8V +/-10%

• Low power dissipation and low jitter

• Programmable VCXO and SSCG options

• EEPROM or I2C Programmability

• Programmable Center or Down Spread Modulation

from 0.25 to 5.0%

• 8 to 48 MHz external crystal range

• 8 to 166 MHz external clock input range

• Programmable 1 to 200 MHz clock output range

• Integrated internal voltage regulator

• Programmable PD#/OE/SSON#/FS functions

• Programmable CL at XIN and XOUT pins

• Programmable output rise and fall times

• 28-pin TSSOP package with commercial and

industrial temperature ranges

Applications

• Printers, MFPs, Digital Copiers

• DTV, HDTV, DVD-R/W and STB

• General Purpose Frequency Synthesising

Description

The SL38000 a fully integrated 4 PLL programmable low

power Clock Generator with SSCG and VCXO functions

used for reducing Electromagnetic Interference (EMI) and

general purpose frequency synthesizing. The product is

designed using SpectraLinear proprietary programmable

EProClock™ phase-locked loop (PLL) and Spread

Spectrum Clock (SSC) technology to synthesize and

modulate the input clock. The modulated clock can

significantly reduce the measured EMI levels, and leading

to the compliance with regulatory agency requirements.

Up to 9 output clock frequencies and 2 REFOUT clocks,

Spread %, output rise and fall times for each clock outputs,

crystal load, modulation frequency and PD#/OE/SSON#/FS

functions can be programmed to meet the needs of wide

range of applications. The SL38000 operates from 2.5V to

3.3V power supply voltage range. The output clocks

(CLKOUTs) can support 3.3 to 2.5V or 1.8V +/-10%. The

product is offered in 28-pin TSSOP package with

commercial and industrial grades.

Benefits

• Peak EMI reduction of 8 to 16 dB

• Fast time-to-market

• Cost Reduction

• Reduction of PCB layers

• Eleminates the need for XOs and VCXOs

Block Diagram

PLL-1

PLL-2

SS-PLL-3

SS-PLL-4

Input Mux

and Control

Logic

Output

Drivers with

Multi

Function I/O

and

Output

Drivers Drive

Strength

Control

XTAL

OSCILLATOR

(XO or VXCO)

SS Logic

Control

Mux and Div

Control

MEMORY

Configuration

Logic

I2C Interface

Input Logic

XIN/CLKIN

XOUT

CLKOUT-1 or MF-1

CLKOUT-2 or MF-2

CLKOUT-3 or MF-3

CLKOUT-4 or MF-4

CLKOUT-5 or MF-5

CLKOUT-6 or MF-6

CLKOUT-7 or MF-7

REFOUT-1 or MF-9

REFOUT-2 or MF-13

MF-8 or MF13

CLKOUT-8, SDATA or

MF-10

CLKOUT-9, SCLK or

MF-11

VSSO

VDDO

Voltage

Regulator-1

VDDA

VSSA

To PLLs

Voltage

Regulator-2

VDDX

VSSX

To XO

and Core

VIN

(Optional)

Programmable 4-PLL CG with VCXO and SSCG

Rev 1.1, August 7, 2008 Page 2 of 12

SL38000

Pin Configuration

SL38000

XIN/CLKIN

MF-8

MF-9

VIN

VDDO-1

VDDO-6

VSSX

VSSA

VSSO-1

VSSO-2

CLKOUT-1/MF-1

CLKOUT-8/SDATA/MF-10

CLKOUT-2/MF-2

CLKOUT-9/SCLK/MF-11

CLKOUT-3/MF-3

CLKOUT-4/MF-4

CLKOUT-5/MF-5

CLKOUT-6/MF-6

CLKOUT-7/MF-7

VSSO-3

XOUT

VDDX

VDDA

MF-13

MF-12

VDDO-4

VDDO-3

VSSO-4

28-Pin TSSOP Package

Rev 1.1, August 7, 2008 Page 3 of 12

SL38000

Pin Description

Number

Pin Name Pin

Type

Pin Description

1 XIN/CLKIN Input Crystal oscillator or external clock input.

2 MF-8 Input Multi function input/output. Programmed as OE, FS. There is no programmable

pull-up/down resistor.

3 MF-9 I/O Multi function input/output. Programmed as REFOUT-1, OE, PD#, SSON# or

FS. Only programmable pull-up resistor available.

4 VIN Input VCXO control pin VIN.

11 CLKOUT-1

or MF-1

I/O Programmable Clock Output-1. This pin can be programmed as OE, PD#,

SSON# or FS. Programmable pull-up/down resistor is available.

12 CLKOUT-8,

SDATA or

MF-10

I/O Programmed as Clock Output-8 or Serial Data Input or multi function input.

This pin can be programmed as OE, PD#, SSON# or FS. Programmable pull-

up/down resistor is available.

13 CLKOUT-2

or MF-2

I/O Programmable Clock Output-2. This pin can be programmed as OE, PD#,

SSON# or FS. This pin can be programmed as OE, PD#, SSON# or FS.

Programmable pull-up/down resistor is available.

14 CLKOUT-9,

SCLK or

MF-11

I/O Programmable Clock Output-9, Serial Data Input Clock or multi function input.

This pin can be programmed as OE, PD#, SSON# or FS. Programmable pull-

up/down resistor is available.

15 CLKOUT-3

or MF-3

I/O Programmable Clock Output-3. This pin can be programmed as OE, PD#,

SSON# or FS. Programmable pull-up/down resistor is available.

16 CLKOUT-4

or MF-4

I/O Programmable Clock Output-4. This pin can be programmed as OE, PD#,

SSON# or FS. Programmable pull-up/down resistor is available.

17 CLKOUT-5

or MF-5

I/O Programmable Clock Output-5. This pin can be programmed as OE, PD#,

SSON# or FS. Programmable pull-up/down resistor is available.

18 CLKOUT-6

or MF-6

I/O Programmable Clock Output-6. This pin can be programmed as OE, PD#,

SSON# or FS. Programmable pull-up/down resistor is available.

19 CLKOUT-7

or MF-7

I/O Programmable Clock Output-7. This pin can be programmed as OE, PD#,

SSON# or FS. Programmable pull-up/down resistor is available.

24 MF-12 Input Multi function input. Programmed as OE, PD#, SSON# or FS.

Programmable pull-up/down resistor is available.

25 MF-13 I/O Multi function input/output. Programmed as REFOUT-2, OE, PD#, SSON# or

FS. Programmable pull-up/down resistor is available.

26 VDDA Power Power supply, 3.3V to 2.5V, for PLLs.

27 VDDX Power Power supply, 3.3V to 2.5V, for oscillator and core logic.

7 VSSX Power Power supply ground for oscillator and core logic.

8 VSSA Power Power supply ground for PLLs.

5 VDDO-1 Power Power supply for CLKOUT-3, 3.3V to 2.5V or 1.8V, VDDO ≤ VDD.

6 VDDO-2 Power Power supply for CLKOUT-1/2/8/9, 3.3V to 2.5V or 1.8V, VDDO ≤ VDD.

P1-P3 P4-P6 P7-P9 P10-P12

SL38000ZCT

Mfr. #:

Buy SL38000ZCT

Manufacturer:

Silicon Labs

Description:

Clock Generators & Support Products 1to 200MHz, 4PLL, 9 outputs CG/SSCG, 3.3 to 2.5V

Lifecycle:

New from this manufacturer.

Delivery:

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SL38000ZCT

SL38000ZCT

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