87946AYI-147LF IDT, Integrated Device Technology Inc, 87946AYI-147LF Datasheet - Page 10

• Manufacturer Part Number: 87946AYI-147LF
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock Dividerr

Specifications of 87946AYI-147LF

• Number Of Clock Inputs: 2
• Mode Of Operation: Single-Ended
• Output Frequency: 250MHz
• Output Logic Level: LVCMOS/LVTTL
• Operating Supply Voltage (min): 3V
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (max): 3.6V
• Package Type: LQFP
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Signal Type: LVCMOS/LVTTL
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / RoHS Status: Compliant

ICS87946I-147 Data Sheet
Application Information
Recommendations for Unused Input and Output Pins
Inputs:
LVCMOS Control Pins
All control pins have internal pulldowns; additional resistance is not
required but can be added for additional protection. A 1kΩ resistor
can be used.
CLK Inputs
For applications not requiring the use of a clock input, it can be left
floating. Though not required, but for additional protection, a 1kΩ
resistor can be tied from the CLK input to ground.
Reliability Information
Table 6.
Transistor Count
The transistor count for ICS87946I-147 is: 1204
Pin compatible to the MPC9446 and MPC946
ICS87946AYI-147 REVISION A AUGUST 7, 2009
Linear Feet per Minute
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
θ
JA
vs. Air Flow Table for a 32 Lead LQFP
θ
JA
67.8°C/W
47.9°C/W
vs. Air Flow
10
0
O
LVCMOS Outputs
All unused LVCMOS output can be left floating. There should be no
trace attached.
UT
puts:
LOW SKEW, ÷1, ÷2 LVCMOS/LVTTL CLOCK GENERATOR
55.9°C/W
42.1°C/W
200
©2009 Integrated Device Technology, Inc.
50.1°C/W
39.4°C/W
500