sy89420v Micrel Semiconductor, sy89420v Datasheet

no-image

sy89420v

Manufacturer Part Number
sy89420v
Description
5v/3.3v Dual Phase Locked Loop
Manufacturer
Micrel Semiconductor
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
sy89420vJC
Manufacturer:
Micrel Inc
Quantity:
10 000
Part Number:
sy89420vJC TR
Manufacturer:
Micrel Inc
Quantity:
10 000
Part Number:
sy89420vJZ
Manufacturer:
MICREL
Quantity:
612
Part Number:
sy89420vJZ
Manufacturer:
Micrel Inc
Quantity:
10 000
Part Number:
sy89420vJZ TR
Manufacturer:
Micrel Inc
Quantity:
10 000
FEATURES
3.3V and 5V power supply options
1.12GHz maximum VCO frequency
30MHz to 560MHz reference input operating
frequency
Frequency doubler mode
Low jitter design
PECL differential outputs
PECL and TTL reference voltages available
External loop filter optimizes performance/cost
Available in 28-pin PLCC package
APPLICATIONS
Workstations
Advanced communications
High-end consumer
High-performance computing
PIN CONFIGURATION
FOUTB
FOUTB
FOUTA
FOUTA
V
V
CCOB
CCOA
V
CC
26
27
28
4
2
3
1
25 24 23 22 21 20 19
5
6
TOP VIEW
7
PLCC
J28-1
8
9
10 11
18
17
16
15
14
13
12
5V/3.3V DUAL
PHASE LOCKED LOOP
RINB
RINB
S4B
V
RINA
RINA
V
EE
BB
1
jitter, digital Phase Locked Loops based on Micrel-Synergy's
differential PLL technology. Each of the PLLs (PLLA and
PLLB) is capable of operating in the 30MHz to 560MHz
input reference frequency range independently of the other
and is configurable separately. The PLLs can be configured
to be matched in all regards, or can be configured so that
PLLB is used as a frequency doubler, while PLLA is used
to regenerate the undoubled frequency.
inputs (FINX and FINX), two filter pins (F1X and F2X) and
two differential outputs (FOUTX and FOUTX) are provided
for each of the two PLLs. The reference and feedback
inputs can be used as either differential or single-ended
inputs. In single-ended mode RINX and FINX can be
connected to either V
V
FOUTX to FINX, FINX by means of external circuitry. This
allows the user the flexibility of inserting additional circuitry
off-chip in the feedback paths, such as a divider. Pulldown
resistors are required for the FOUTX and FOUTX pins.
PLL locking and tracking characteristics. Error correction
voltages are generated by the detector if either phase or
frequency deviations occur. The VCO has a frequency
range covering more than a 2:1 ratio from 480MHz to
1120MHz.
dividers for optimum VCO operation, in other words with
the VCO in the center of its range. Additional select pins,
S3B and S4B, are provided for PLLB. When both S3B and
S4B are low, PLLB is identical to PLLA. When S3B is high,
N
frequency doubler option is enabled (P = 2). All Select pins
are TTL compatible.
TH
B
DESCRIPTION
The SY89420V device consists of two identical, low
Two reference inputs (RINX and RINX), two feedback
Feedback for the loops is realized by connecting FOUTX,
Use of a phase-frequency detector results in excellent
Select pins S1X and S2X are used to program the N
can be set to 1, 10, 18, or 20. When S4B is high, the
for normal TTL levels.
BB
for normal 100K PECL levels or
ClockWorks™
Rev.: K
Issue Date: May 2000
SY89420V
Amendment: /0
FINAL

Related parts for sy89420v

sy89420v Summary of contents

Page 1

... DUAL PHASE LOCKED LOOP DESCRIPTION The SY89420V device consists of two identical, low jitter, digital Phase Locked Loops based on Micrel-Synergy's differential PLL technology. Each of the PLLs (PLLA and PLLB) is capable of operating in the 30MHz to 560MHz input reference frequency range independently of the other and is configurable separately ...

Page 2

... FINA RINB D RINB PHASE-FREQUENCY FINB ÷ (1, 2) FINB S4B F1A F2A LOOP FILTER DETECTOR S1B S2B S3B DETECTOR P LOOP FILTER F1B F2B 2 VCO S1A ÷ ( 16) S2A ÷ (1,2,4,8,10,12,16,20) VCO ClockWorks™ SY89420V FOUTA FOUTA FOUTB FOUTB ...

Page 3

... V be decoupled and present a very low impedance in order to — assure low-jitter operation. — V — EE — This pin is the negative supply for the chip and is normally connected to ground (0V ClockWorks™ SY89420V BB is TTL compatible They should CC ...

Page 4

... Divide-by (1) Parameter (3) 4 ClockWorks™ SY89420V Output Frequency Range (MHz) 240 – 560 120 – 280 60 – 140 30 – 70 Output Frequency Range (MHz) 240 – 560 120 – 280 60 – 140 30– 70 480 – 1120 48 – 112 40 – ...

Page 5

... CCO mA mA PECL outputs are open Max. Unit Condition V – 0.780 – 1.520 – 0.780 – 1.475 V CC — V Max. Unit Condition — 2.7V IN 100 –0 0.5V IN – 1 –12mA IN — V SY89420V ...

Page 6

... Low Skew Clock System with 100MHz Clock to CPU Operating Range Commercial Commercial 6 Max. Unit Condition 15 ps rms 55 % 550 ps — 550 560 MHz 1120 MHz S4B=1 560 MHz OUTA SY100H641 OUTA OUTB SY100H842 OUTB S1B = 1 S2B = 0 ClockWorks™ SY89420V 50MHz 100MHz ...

Page 7

... Micrel 28 LEAD PLCC (J28-1) 7 ClockWorks™ SY89420V Rev. 03 ...

Page 8

... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc (408) 914-7878 http://www.micrel.com FAX WEB © 2000 Micrel Incorporated 8 ClockWorks™ SY89420V ...

Related keywords