SY87702LHI Micrel Inc, SY87702LHI Datasheet - Page 7

• Manufacturer Part Number: SY87702LHI
• Description: IC CLOCK/DATA RECOVERY 64-TQFP
• Manufacturer: Micrel Inc
• Type: Clock and Data Recovery (CDR)r

Specifications of SY87702LHI

• Input: Differential
• Output: Differential
• Frequency - Max: 325MHz
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Frequency-max: 325MHz
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Micrel, Inc.
General
circuit, capable of dealing with NRZ data rates from 28Mbps
through to 2.5Gbps. A reference PLL is used as a frequency
synthesizer, both to multiply a clock to the desired transmit
rate, and to train the recovery PLL in preparation for actual
data recovery.
VCO Selection
of the application and the frequency range, any one of
these four perform data recovery.
general purpose VCOs, covering one of three frequency
M9999-072706
[e-mail] or [phone]
DESCRIPTION
The SY87702L is a complete clock and data recovery
SY87702L has four complete VCO circuits. Depending
As indicated by the VCO selection table, there are three
NOTES:
1. Suggested range for Fibre Channel applications.
2. REFCLK multiplier of 2 is not allowed in this range.
3. REFCLK multiplier of 1 is not allowed in this range.
4. Combinations of VCOSEL and FREQSEL other then those in this table result in undefined behavior, and should not be
used.
VCOSEL1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
VCOSEL2
0
0
0
0
0
1
1
0
1
1
1
1
1
1
1
1
FREQSEL1
0
0
0
1
1
0
0
0
0
0
0
0
1
1
1
1
Table 4.
7
FREQSEL2
ranges. However, to extend the range of the device, the
output of the VCO may be divided down.
is always set to 1. For the lowest frequency VCO, the
FREQSEL pins select which divisor, and hence, which range
of frequencies the VCO will work over.
band, extremely low jitter PLL. It also uses the FREQSEL
divisor to choose the correct SONET/SDH frequency.
are not arbitrary, but are limited to the subset shown in
Table 4, where the range column indicates frequency in
Mbps.
(4)
In the case of the two highest frequency VCO, this divisor
In addition, for SONET/SDH applications, there is a narrow
The various combinations of FREQSEL and VCOSEL
0
0
1
0
1
0
0
0
0
0
1
1
0
0
1
1
FREQSEL3
0
1
0
0
0
0
1
0
0
1
0
1
0
1
0
1
Range (Mbps)
2488 (OC48)
900–1250
650–1300
622 (OC12)
1800–2500
1250–1800
325–650
155 (OC3)
163–325
109–216
82–162
55–108
41–81
28–54
1244
311
(3)
(1)
(2)
SY87702L