Integrated

Circuit

Systems, Inc.

General Description

Features

ICS2510C

Block Diagram

3.3V Phase-Lock Loop Clock Driver

2510 C Rev D 06/15/01

Pin Configuration

The ICS2510C is a high performance, low skew, low jitter

clock driver. It uses a phase lock loop (PLL) technology to

align, in both phase and frequency, the CLKIN signal with

the CLKOUT signal. It is specifically designed for use with

synchronous SDRAMs. The ICS2510C operates at 3.3V VCC

and drives up to ten clock loads.

One bank of ten outputs provide low-skew, low-jitter copies

of CLKIN. Output signal duty cycles are adjusted to 50

percent, independent of the duty cycle at CLKIN. Outputs

can be enabled or disabled via control (OE) inputs. When the

OE inputs are high, the outputs align in phase and frequency

with CLKIN; when the OE inputs are low, the outputs are

disabled to the logic low state.

The ICS2510C does not require

external RC filter

components. The loop filter for the PLL is included on-chip,

minimizing component count, board space, and cost. The test

mode shuts off the PLL and connects the input directly to the

output buffer. This test mode, the ICS2510C can be use as

low skew fanout clock buffer device. The ICS2510C comes

in 24 pin 173mil Thin Shrink Small-Outline package (TSSOP)

package.

•

Meets or exceeds PC133 registered DIMM

specification1.1

•

Spread Spectrum Clock Compatible

•

Distributes one clock input to one bank of ten outputs

•

Operating frequency 25MHz to 175MHz

•

External feedback input (FBIN) terminal is used to

synchrionize the outputs to the clock input

•

No external RC network required

•

Operates at 3.3V Vcc

•

Plastic 24-pin 173mil TSSOP package

FBIN

CLKIN

AVCC

OE

PLL

CLK1

CLK0

FBOUT

CLK2

CLK3

CLK4

CLK5

CLK6

CLK7

CLK8

CLK9

AGND

VCC

CLK0

CLK1

CLK2

GND

GND

CLK3

CLK4

VCC

OE

FBOUT

CLKIN

AVCC

VCC

CLK9

CLK8

GND

GND

CLK7

CLK6

CLK5

VCC

FBIN

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

ICS reserves the right to make changes in the device data identified in

this publication without further notice. ICS advises its customers to

obtain the latest version of all device data to verify that any

information being relied upon by the customer is current and accurate.

24 Pin TSSOP

4.40 mm. Body, 0.65 mm. pitch