ICS9FG1904BK-1LF IDT, Integrated Device Technology Inc, ICS9FG1904BK-1LF Datasheet - Page 4

• Manufacturer Part Number: ICS9FG1904BK-1LF
• Description: IC FREQUENCY GENERATOR 72-VFQFPN
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Frequency Generatorr

Specifications of ICS9FG1904BK-1LF

• Input: Clock
• Output: Clock
• Frequency - Max: 400MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 72-VFQFN, 72-VFQFPN
• Frequency-max: 400MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 9FG1904BK-1LF

ThThe ICS9FG1904-1 follows the Intel DB1900GS Differential Buffer Specification, except for the output groupings and gear
table. The gear table is a blend of the GS and GSO gearing. This buffer provides 19 output clocks for CPU Host Bus, PCI-
Express, or Fully Buffered DIMM applications. The outputs are configured with two groups. Both groups, DIF_(14:0) and
DIF_(18:15) can be equal to or have a gear ratio to the input clock. A differential CPU clock from a CK410B+ main clock
generator, such as the ICS932S421, drives the ICS9FG1904-1. The ICS9FG1904-1 can provide outputs up to 400MHz.
General Description
Block Diagram
Power Groups
1255B—08/03/07
11,27,47,63 10,28,46,64
VDD
3
Pin Number
Integrated
Circuit
Systems, Inc.
SMB_A2_PLLBYP#
CKPWRGD/PD#
OE_17_18#
OE_15_16#
OE_01234#
HIGH_BW#
OE(14:5)#,
FS_A_410
CLK_IN#
SMBCLK
SMB_A0
SMB_A1
SMBDAT
CLK_IN
GND
2
11
2
CONTROL
LOGIC
Main PLLs, Analog
Description
DIF clocks
GEARING PLL
COMPATIBLE
COMPATIBLE
SPREAD
SPREAD
1:1 PLL
4
15
4
IREF
ICS9FG1904B-1
DIF(18:15)
DIF(14:0)