ICS9212-13 Datasheet, PDF (1/7 Pages) Integrated Circuit Systems – Direct Rambus™ Clock Generator

Integrated
Circuit
Systems, Inc.
ICS9212 - 13
Direct Rambus™ Clock Generator
General Description
Features
The ICS9212-13 is a High-speed clock generator providing ^{• Compatible with all Direct Rambus™ based IC s}
up to 600 MHz differential clock source for direct Rambus™ _{• Up to 600 MHz differential clock source for direct}
memory system. It includes DDLL (Distributed Delay
Rambus™ memory system
locked loop) and phase detection mechanism to
synchronize the direct Rambus™ channel clock to an
•
Cycle to cycle jitter is less than 40ps
external system clock. ICS9212-13 provides a solution for • 3.3 + 5% supply
a broad range of Direct Rambus memory applications. The
device works in conjunction with the ICS9250-09.
•
Synchronization flexibility: Supports Systems that
need clock domains of Rambus channel to
The ICS9212-13 power management support system
turns “off” the Rambus™ channel clock to minimize power
consumption for mobile and other power–sensitive
synchronize with system or processor clock, or
systems that do not require synchronization of the
Rambus clock to another system clock
applications. In “clock off” mode the device remains “on” ^{• Excellent power management support}
while the output is disabled, allowing fast transitions _{• REFCLK input is from the ICS9250-09.}
between clock-off and clock–on states. In “power down”
mode it completely powers down for minimum power
dissipation.
The ICS9212-13 meets the requirements for input frequency
tracking when the input frequency clock is using Spread
Spectrum clocking and also the optimum bandwidth is
maintained while attenuating the jitter of the reference
signal.
Block Diagram
BUSCLK_STOP#
PD#
FS(0:1)
Test MUX
Bypass MUX
GND
Bypclk
PLLclk
Refclk
Multi(0:1)
2
Pclk/M
Synclk/N
B
PLL
A
Phase
Aligner
PAclk
Phase
Detector
GND
Pin Configuration
VDDREF
1
REFCLK
2
VDD1
3
GND1
4
GND3
5
PCLK/M
6
SYNCLK/N
7
BUSCLKT
BUSCLKC
GND2
8
VDD2
9
VDDPD 10
BUSCLK_STOP# 11
PD# 12
24 FS0
23 FS1
22 VDD-OUT
21 GND-OUT
20 BUSCLKT
19 N/C
18 BUSCLKC
17 GND-OUT
16 VDD-OUT
15 MULTI0
14 MULTI1
13 FS2
24-Pin 150 Mil SSOP
0272F—08/08/07