19-1258; Rev 4; 4/05
NUAL
KIT MA
ATION
EVALU
BLE
AVAILA
622Mbps, Low-Power, 3.3V Clock-Recovery
and Data-Retiming IC with Limiting Amplifier
General Description
The MAX3675 is a complete clock-recovery and data-
retiming IC incorporating a limiting amplifier. It is intend-
ed for 622Mbps SDH/SONET applications and operates
from a single +3.3V supply.
The MAX3675 has two differential input amplifiers: one
accepts PECL levels, while the other accepts small-sig-
nal analog levels. The analog inputs access the limiting
amplifier stage, which provides both a received-signal-
strength indicator (RSSI) and a programmable-threshold
loss-of-power (LOP) monitor. Selecting the PECL amplifier
disables the limiting amplifier, conserving power. A loss-
of-lock (LOL) monitor is also incorporated as part of the
fully integrated PLL.
Features
o
Single +3.3V or +5.0V Power Supply
o
Complies with ANSI, ITU, and Bellcore
SDH/SONET Specifications
o
Low Power: 215mW at +3.3V
o
Selectable Data Inputs, Differential PECL or
Analog
o
o
o
o
Received-Signal-Strength Indicator (RSSI)
Loss-of-Power and Loss-of-Lock Monitors
Differential PECL Clock and Data Outputs
No External Reference Clock Required
MAX3675
Ordering Information
Applications
SDH/SONET Transmission Systems
SDH/SONET Access Nodes
Add/Drop Multiplexers
ATM Switches
Digital Cross-Connects
Pin Configuration appears at end of data sheet.
PART
MAX3675ECJ
MAX3675EHJ
MAX3675E/D
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 TQFP
5mm 32 TQFP
Dice*
PKG
CODE
C32-1
H32-1
DICE
*Contact factory for availability. Dice are designed to operate
from -40°C to +85°C, but are tested and guaranteed only at
Tj = +45°C.
Typical Operating Circuit
+3.3V
+3.3V
0.1µF
INSEL LOL
V
CC
C
IN
0.01µF
Z
O
= 50Ω
100Ω
IN
OUT-
GND
COMP
220pF
CFILT OLC+ OLC- GND
C
F
47nF
C
OLC
33nF
R2
R1
100k
RSSI
INV
VTH LOP
Z
O
= 50Ω
82Ω
82Ω
Z
O
= 50Ω
+3.3V
C
IN
0.01µF
V
CC
ADI-
SCLKO+
130Ω
SCLKO-
Z
O
= 50Ω
130Ω
ADI+
DDI+
DDI-
SDO-
100pF
PHOTO-
DIODE
82Ω
82Ω
PHADJ+ PHADJ- FIL+
FIL-
SDO+
Z
O
= 50Ω
Z
O
= 50Ω
C
LOL
0.01µF
+3.3V
52.3Ω
2.2µF
1%
130Ω
0.01µF
130Ω
FILT
MAX3664
INREF
OUT+
MAX3675
+3.3V
________________________________________________________________
Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
622Mbps, Low-Power, 3.3V Clock-Recovery
and Data-Retiming IC with Limiting Amplifier
MAX3675
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
.................................................-0.5V to +6.5V
Input Voltage Levels,
DDI+, DDI-, ADI+, ADI- ..............................-0.5V to (V
CC
+ 0.5V)
Input Differential Voltage (ADI+) - (ADI-) ..................................±3V
PECL Output Currents, SDO+, SDO-, SCLKO+, SCLKO-...100mA
LOL,
LOP, INSEL, PHADJ+, PHADJ-............-0.5V to (V
CC
+ 0.5V)
FIL+, FIL-, OLC+, OLC-, RSSI, VTH ..............-0.5V to (V
CC
+ 0.5V)
(OLC+) - (OLC-).........................................................................±3V
(FIL+) - (FIL-).......................................................................±700mV
CFILT...................................................(V
CC
- 2.5V) to (V
CC
+ 0.5V)
INV .............................................................................-0.5V to +2.0V
Continuous Power Dissipation (T
A
= +85°C)
7mm x 7mm TQFP (derate 20.7mW/°C above +85°C) ..1342mW
5mm x 5mm TQFP (derate 13.1mW/°C above +85°C) .845.6mW
Operating Junction Temperature Range..............-40°C to +150°C
Storage Temperature Range ................................-65°C to +160°C
Processing Temperature (die).............................................+400°C
Lead Temperature (soldering,10s)......................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
Supply Current
PECL Input High Voltage
PECL Input Low Voltage
PECL Input High Current
PECL Input Low Current
PECL Output High Voltage
PECL Output Low Voltage
LOP, LOL High Voltage
LOP Low Voltage
LOL Low Voltage
ADI+, ADI- Input Bias Voltage
ADI+, ADI- open
RSSI Output Voltage
Op Amp Input Bias Current
INV Input Bias Voltage
(ADI+) - (ADI-) = 20mVp-p
(ADI+) - (ADI-) = 80mVp-p
1MΩ between INV and VTH
1MΩ between INV and VTH
2.00
2.38
-100
1.10
1.18
SYMBOL
I
CC
V
IH
V
IL
I
IH
I
IL
V
OH
V
OL
V
OH
V
OL
V
OL
C
LOL
= 0.01µF
V
CC
- 0.7
CONDITIONS
MAX3675ECJ,
PECL outputs
unterminated
INSEL = V
CC
INSEL = GND
V
CC
- 1.16
V
CC
- 1.81
-10
-10
V
CC
- 1.03
V
CC
- 1.81
2.4
0.1
0.44
V
CC
- 0.6
1.22
2.12
2.51
2.30
2.70
+100
1.30
nA
V
V
V
CC
- 0.5
0.4
MIN
TYP
65
47
MAX
90
mA
65
V
CC
- 0.88
V
CC
- 1.48
10
10
V
CC
- 0.88
V
CC
- 1.620
V
V
µA
µA
V
V
V
V
V
V
UNITS
Note 1:
Dice are tested at T
j
= +45°C, V
CC
= +4.25V.
Note 2:
At T
A
= -40°C, DC characteristics are guaranteed by design and characterization.
2
_______________________________________________________________________________________
622Mbps, Low-Power, 3.3V Clock-Recovery
and Data-Retiming IC with Limiting Amplifier
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25°C.)
(Notes 3, 4)
PARAMETER
Differential Input Voltage Range
Input Referred Noise
Power-Detect Hysteresis
Limiting Amplifier Small-Signal Bandwidth
RSSI Output Voltage
Threshold Voltage
RSSI Linearity
RSSI Slope
Loop Bandwidth
Jitter Generation (Note 9)
Jitter-Transfer Peaking
V
TH
BW
SYMBOL
V
ID
V
N
CONDITIONS
BER < 10
-10
, ADI inputs (Note 5)
ADI inputs
V
RELEASE
= 3.6mVp-p (Note 6)
(Note 7)
(ADI+) - (ADI-) = 2mVp-p
(ADI+) - (ADI-) = 20mVp-p
V
RELEASE
= 3.6mVp-p
(ADI+) - (ADI-) = 2mVp-p to 50mVp-p
(ADI+) - (ADI-) = 2mVp-p to
50mVp-p (Note 8)
C
F
= 2.2µF, R
F
= 52.3Ω
C
F
= 0.022µF, R
F
= 523Ω
C
F
= 2.2µF, R
F
= 52.3Ω
C
F
= 0.022µF,C
FF
= 0.022µF
R = 523Ω
R
F
= 52.3Ω, C
F
= 2.2µF
f = 10kHz
Jitter Tolerance (Note 9)
R
F
= 52.3Ω,
C
F
= 2.2µF
f = 25kHz
f = 250kHz
f = 1MHz
Maximum Consecutive Input
Run Length (1 or 0)
Serial Clock-to-Q Delay
Serial Clock Frequency
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
t
CLK-Q
f
SCLK
195
1.50
0.25
0.20
8
3.35
0.60
0.50
1000
275
622.08
370
Bits
ps
MHz
UI
2
MIN
0.003
100
3
800
1.36
1.93
1.40
±0.7
29
350
3.5
13
6
0.08
5
TYP
MAX
1.2000
UNITS
Vp-p
µV
dB
MHz
V
V
%
mV/dB
kHz
MHz
mUI
dB
MAX3675
AC parameters are guaranteed by design and characterization.
The MAX3675 is characterized with a PRBS of 2
23
- 1 maintaining a BER of
≤
10
-10
having a confidence level of 99.9%.
A lower minimum input voltage of 2mVp-p is achievable; however, the LOP hysteresis is not guaranteed below 3.6mVp-p.
Hysteresis = 20log(V
RELEASE
/ V
ASSERT
).
Small-signal bandwidth cannot be measured directly.
RSSI slope = [V
RSSI2
- V
RSSI1
] / [20log (V
ID2
/ V
ID1
)].
1UI = 1 unit interval = (622.08MHz)
-1
= 1.608ns.
_______________________________________________________________________________________
3
622Mbps, Low-Power, 3.3V Clock-Recovery
and Data-Retiming IC with Limiting Amplifier
MAX3675
__________________________________________Typical Operating Characteristics
(T
A
= +25°C, unless otherwise noted.)
RECOVERED DATA AND
CLOCK (SINGLE ENDED)
MAX3675 TOC01
RECOVERED CLOCK JITTER
MAX3675 TOC02
BIT ERROR RATE
vs. INPUT VOLTAGE
10
-3
10
-4
BIT ERROR RATE
10
-5
10
-6
10
-7
10
-8
2
23
-1 PATTERN
V
CC
= +3.3V
MAX3675 TOC03
10
-2
2
23
-1 PATTERN
V
CC
= +3.3V
R
F
= 520Ω
C
F
= 0.022µF
DATA
2
23
-1 PATTERN
V
CC
= +3.3V
R
F
= 520Ω
C
F
= 0.022µF
CLOCK
RMS∆ = 12.8ps
10
-9
10
-10
380ps/div
JITTER FREQUENCY (Hz)
20ps/div
JITTER FREQUENCY (Hz)
600µ 700µ 800µ 900µ
1m
1.1m 1.2m 1.3m
INPUT VOLTAGE (Vp-p)
JITTER TOLERANCE
2
23
-1 PATTERN
V
CC
= +3.3V
R
F
= 52.3Ω
C
F
= 2.2µF
MAX3675 TOC04
JITTER TRANSFER
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
-1.4
-1.6
-1.8
-2.0
-2.2
-2.4
-2.6
-2.8
-3.0
2k
MAX3675 TOC05
10
1
BELLCORE
MASK
JITTER TRANSFER (dB)
INPUT JITTER (UIp-p)
BELLCORE
MASK
2
23
-1 PATTERN
V
CC
= +3.3V
RF = 52.3Ω
CF = 2.2µF
10k
100k
700k
0.1
10k
100k
JITTER FREQUENCY (Hz)
1M
JITTER FREQUENCY (Hz)
4
_______________________________________________________________________________________
622Mbps, Low-Power, 3.3V Clock-Recovery
and Data-Retiming IC with Limiting Amplifier
____________________________Typical Operating Characteristics (continued)
(T
A
= +25°C, unless otherwise noted.)
LOSS-OF-POWER
HYSTERESIS vs. TEMPERATURE
MAS3675 TOC06
MAX3675
RECEIVED-SIGNAL-STRENTH INDICATOR
vs. INPUT VOLTAGE
MAX3675 TOC07
LOSS-OF-POWER
ASSERT AND RELEASE LEVEL
vs. THRESHOLD VOLTAGE
2
23
-1 PATTERN
V
CC
= +3.3V
MAX4108/9-08
4.0
3.8
3.6
HYSTERESIS (dB)
3.4
2
23
-1 PATTERN
V
CC
= +3.3V OR +5.0V
2.8
V
CC
= +3.3V
2.6
2.4
RSSI (V)
2.2
2.0
1.8
1010 PATTERN
1.6
1.4
1.2
2
23
-1 PATTERN
100m
ANALOG INPUT VOLTAGE (Vp-p)
3.2
3.0
2.8
2.6
2.4
2.2
2.0
-40
-20
0
20
40
60
80
AMBIENT TEMPERATURE (°C)
LOP RELEASE
10m
LOP ASSERT
1m
100µ
1m
10m
100m
1
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5
DETECTOR THRESHOLD VOLTAGE, V
TH
(V)
INPUT VOLTAGE (Vp-p)
RECEIVED-SIGNAL-STRENGTH INDICATOR
vs. INPUT VOLTAGE
MAX3675 TOC09
SUPPLY CURRENT
vs. TEMPERATURE
MAX3675 TOC10
2.8
2
23
-1 PATTERN
2.6
2.4
RSSI (V)
2.2
2.0
1.8
V
CC
= 3.3V
1.6
1.4
1.2
100µ
1m
10m
100m
1
INPUT VOLTAGE (Vp-p)
V
CC
= 5.0V
90
80
SUPPLY CURRENT (mA)
V
CC
= 5.0V
70
60
50
40
30
-40
-20
0
20
40
60
V
CC
= 3.3V
80
AMBIENT TEMPERATURE (°C)
_______________________________________________________________________________________
5
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