ICS93732 Datasheet, PDF (1/8 Pages) Integrated Circuit Systems – Low Cost DDR Phase Lock Loop Zero Delay Buffer

Integrated
Circuit
Systems, Inc.
ICS9373 2
Low Cost DDR Phase Lock Loop Zero Delay Buffer
Recommended Application:
DDR Zero Delay Clock Buffer
Product Description/Features:
• Low skew, low jitter PLL clock driver
• Max frequency supported = 266MHz (DDR 533)
• I²C for functional and output control
• Feedback pins for input to output synchronization
• Spread Spectrum tolerant inputs
• 3.3V tolerant CLK_INT input
Switching Characteristics:
• CYCLE - CYCLE jitter (66MHz): <120ps
• CYCLE - CYCLE jitter (>100MHz): <65ps
• CYCLE - CYCLE jitter (>200MHz): <75ps
• OUTPUT - OUTPUT skew: <100ps
• DUTY CYCLE: 49.5% - 50.5%
Pin Configuration
DDRC0
DDRT0
VDD
DDRT1
DDRC1
GND
SCLK
CLK_INT
N/C
VDDA
GND
VDD
DDRT2
DDRC2
28-pin 209mil SSOP
GND
DDRC5
DDRT5
DDRC4
DDRT4
VDD
SDATA
N/C
FB_INT
FB_OUTT
N/C
DDRT3
DDRC3
GND
Block Diagram
SCLK
SDATA
Control
Logic
FB_INT
PLL
CLK_INT
Functionality
FB_OUTT
DDRT0
DDRC0
DDRT1
DDRC1
DDRT2
DDRC2
DDRT3
DDRC3
DDRT4
DDRC4
DDRT5
DDRC5
INPUTS
OUTPUTS
PLL State
AVDD CLK_INT CLKT CLKC FB_OUTT
2.5V
(nom)
L
LH
L
on
2.5V
(nom)
H
HL
H
on
0578J—06/20/08