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參數(shù)資料
| 型號(hào)： | SY89425 |
| 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(雙鎖相環(huán)時(shí)鐘合成器（由兩個(gè)Sonet兼容時(shí)鐘發(fā)生器組成）) |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, PQCC28 |
| 封裝： | PLASTIC, LCC-28 |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大?。?/td> | 93K |
| 代理商： | SY89425 |
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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PDF描述 |
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| SY89425JCTR | DUAL SONET OC-12 CLOCK SYNTHESIZER |
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| SY89473U | Precision LVPECL 2:1 Multiplexer with 1:2 Fanout and Internal Termination |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SY89425JC | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:DUAL SONET OC-12 CLOCK SYNTHESIZER |
| SY89425JCTR | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:DUAL SONET OC-12 CLOCK SYNTHESIZER |
| SY89425VJC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
| SY89425VJCTR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
| SY89426 | 制造商:MICREL 制造商全稱:Micrel Semiconductor 功能描述:SONET OC-12/OC-3 CLOCK SYNTHESIZER |
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