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5V925BQGI8 bảng dữ liệu(PDF) 1 Page - Integrated Device Technology

tên linh kiện 5V925BQGI8
Giải thích chi tiết về linh kiện  Programmable LVCMOS/LVTTL Clock Generator
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nhà sản xuất  IDT [Integrated Device Technology]
Trang chủ  http://www.idt.com
Logo IDT - Integrated Device Technology

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DATA SHEET
IDT5V925BQGI REVISION B JANUARY 21, 2011
1
©2011 Integrated Device Technology, Inc.
Programmable LVCMOS/LVTTL
Clock Generator
IDT5V925BI
General Description
The IDT5V925BI is a high-performance, low skew, low jitter
phase-locked loop (PLL) clock driver. It provides precise phase and
frequency alignment of its clock outputs to an externally applied
clock input or internal crystal oscillator. The IDT5V925BI has been
specially designed to interface with Gigabit Ethernet and Fast
Ethernet applications by providing a 125MHz clock from 25MHz
input. It can also be programmed to provide output frequencies
ranging from 3.125MHz to 160MHz with input frequencies ranging
from 3.125MHz to 80MHz.
The IDT5V925BI includes an internal RC filter that provides
excellent jitter characteristics and eliminates the need for external
components. When using the optional crystal input, the chip accepts
a 10-30MHz fundamental mode crystal with a maximum equivalent
series resistance of 50
. The on-chip crystal oscillator includes the
feedback resistor and crystal capacitors (nominal load capacitance
is 18pF).
Applications
Ethernet/fast ethernet
Router
Network switches
SAN
Instrumentation
Features
3V to 3.6V operating voltage
3.125MHz to 160MHz output frequency range
Four programmable frequency LVCMOS/LVTTL outputs
Input from fundamental crystal oscillator or external source
Balanced drive outputs ±12mA
PLL disable mode for low frequency testing
Select inputs (S[1:0]) for divide selection (multiply ratio of 2, 3, 4,
5, 6, 7 and 8)
5V tolerant inputs
Low output skew/jitter
External PLL feedback, internal loop filter
-40°C to 85°C ambient operating temperature
Available in Lead-free (RoHS 6) package
Q/N
Q0
Q1
Q2
OPTIONAL
CRYSTAL
X1
X2
LOOP
FILTER
VCO
PHASE
DETECTOR
XTAL
OSC
FB
CLKIN
OE
S0
S1
SELECT
MODE
VCO
DIVIDE
1/N
0
1
IDT5V925BI
16 LEAD QSOP
0.194” x 0.236” x 0.058” package body
Q Package
Top View
Pin Assignment
Block Diagram
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
S1
S0
GNDQ
VDDQ
X1
X2
CLKIN
FB
GND
Q2
Q1
Q0
Q/N
GND
OE
VDD


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