Integrated
Circuit
Systems, Inc.
ICS97U877AHLF/AKLF
Advance Information
1.8V Wide Range Frequency Clock Driver
Recommended Application:
• DDR2 Memory Modules / Zero Delay Board Fan Out
• Provides complete DDR DIMM logic solution with
ICSSSTU32864
Product Description/Features:
• Low skew, low jitter PLL clock driver
• 1 to 10 differential clock distribution (SSTL_18)
• Feedback pins for input to output synchronization
• Spread Spectrum tolerant inputs
• Auto PD when input signal is at a certain logic state
Switching Characteristics:
• Period jitter: 40ps
• Half-period jitter: 60ps
• CYCLE - CYCLE jitter 40ps
• OUTPUT - OUTPUT skew: 40ps
Pin Configuration
1
A
B
C
D
E
F
G
H
J
K
2
3
4
5
6
97U877AHLF 52-Ball BGA
A
B
C
D
E
F
G
H
J
K
1
CLKT1
CLKC1
CLKC2
CLKT2
CLK_INT
CLK_INC
AGND
AVDD
CLKT3
CLKC3
2
CLKT0
GND
GND
VDDQ
VDDQ
VDDQ
VDDQ
GND
GND
CLKC4
3
CLKC0
GND
NB
VDDQ
NB
NB
VDDQ
NB
GND
CLKT4
4
CLKC5
GND
NB
VDDQ
NB
NB
VDDQ
NB
GND
CLKT9
5
CLKT5
GND
GND
OS
VDDQ
OE
VDDQ
GND
GND
CLKC9
6
CLKT6
CLKC6
CLKC7
CLKT7
FB_INT
FB_INC
FB_OUTC
FB_OUTT
CLKT8
CLKC8
CLKT0
OE
OS
AV
DD
Powerdown
Control and
Test Logic
LD* or OE
LD*, OS or OE
CLKC0
CLKT1
CLKC1
CLKT2
LD*
PLL bypass
CLKC2
CLKT3
CLKC3
CLKT4
CLKC4
CLKT5
CLKC5
CLK_INT
CLK_INC
10K-100k
PLL
GND
FB_INT
FB_INC
* The Logic Detect (LD) powers down the device when a
logic low is applied to both CLK_INT and CLK_INC.
CLKT6
CLKC6
CLKT7
CLKC7
CLKT8
CLKC8
CLKT9
CLKC9
FB_OUTT
FB_OUTC
40
VDDQ
CLKC2
CLKT2
CLK_INT
CLK_INC
VDDQ
AGND
AVDD
VDDQ
GND
CLKC1
CLKT1
CLKT0
CLKC0
VDDQ
CLKC5
CLKT5
CLKT6
CLKC6
VDDQ
31
Block Diagram
1
30
ICS97U877AKLF
10
21
11
20
CLKC7
CLKT7
VDDQ
FB_INT
FB_INC
FB_OUTC
FB_OUTT
VDDQ
OE
OS
0792—12/18/03
ADVANCE INFORMATION
documents contain information on products in the formative or design phase development. Characteristic data and other specifications are design goals.
ICS reserves the right to change or discontinue these products without notice. Third party brands and names are the property of their respective owners.
CLKT3
CLKC3
CLKC4
CLKT4
VDDQ
CLKT9
CLKC9
CLKC8
CLKT8
VDDQ
40-Pin MLF
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
