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參數(shù)資料
| 型號： | SY89425JCTR |
| 廠商： | MICREL INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | DUAL SONET OC-12 CLOCK SYNTHESIZER |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 93K |
| 代理商： | SY89425JCTR |
I
Two independently-powered 622.08MHz clock
sources one chip
I
Differential PECL outputs
I
TTL/CMOS compatible inputs
I
SONET compliant jitter performance (
≤
0.01UI)
I
Choice of three reference frequencies for each PLL
I
Only 395mW per PLL (typ)
I
Complies with Bellcore, CCITT and ANSI standards
I
Single +5 volt power supply
I
Fully compatible with industry standard 10KH I/O
levels
I
Available in 28-pin PLCC package
Rev.: E
Issue Date: August, 1998
Amendment: /0
TYPICAL APPLICATION
ClockWorks
SY89425
FEATURES
DESCRIPTION
Micrel-Synergy's SY89425 Dual Phase Locked Loop
(PLL) consists of two totally separate, SONET compliant
622.08MHz clock generators on one chip. The user may
select to power both PLLs or PLL A only. Each PLL
produces a low-jitter OC-12/STS-12 clock rate from an
input reference clock of 38.88, 51.84, or 77.76MHz. When
using both PLLs, it is not necessary that they share a
common reference clock (e.g., PLL A may operate from an
STS-1 reference of 51.84MHz, while PLL B operates from
an OC-3/STS-3 reference of 77.76MHz).
The SY89425 operates from a single +5 volt supply, and
requires only a simple series RC loop filter for each PLL.
Coupling Micrel-Synergy's advanced PLL technology
with our proprietary ASSET bipolar process has produced
a clock generator IC which exceeds applicable Bellcore
and ANSI specifications, while setting a new standard for
performance and flexibility.
PIN CONFIGURATION
DUAL SONET OC-12
CLOCK SYNTHESIZER
26
27
28
1
2
3
4
18
17
16
15
14
13
12
25 24 23 22
21 20 19
5
6
7
8
9
10 11
SEL78A
RFCKA
V
CCA
RFCKB
G
V
C
F
F
V
C
G
R
CK622AP
CK622AN
V
CCOA
G
G
V
C
F
F
V
C
R
PLCC
TOP VIEW
GND
V
CCOB
CK622BN
CK622BP
SEL39A
SEL39B
SEL78B
0.1uF
GND
AGND
FLTRAN
RFCKA
(TTL)
SEL39A
(TTL)
SEL78A
(TTL)
RSTA
(TTL)
500
CK622AP
(PECL)
CK622AN
622.08MHz
PLL A
VCCA
VCCOA
+5V
+5V
FLTRAP
PLL B
(SAME AS PLL A)
2X 50
+3V
GND
CLOCK IN
1
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| SY89426JC | 功能描述:IC SYNTHESIZER CLK SONET 28-PLCC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:Precision Edge® 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類型:頻率合成器 PLL:是 輸入:PECL，晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/是 頻率 - 最大:800MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
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