MAXIM MAX3680, MAX3680A User Manual
_________________General Description
The MAX3680/MAX3680A deserializer is ideal for converting 622Mbps serial data to 8-bit-wide, 77Mbps parallel data in ATM and SDH/SONET applications.
Operating from a single +3.3V supply, this device
accepts PECL serial clock and data inputs, and delivers TTL clock and data outputs. The MAX3680 also provides a TTL synchronization input that enables data
realignment and reframing.
The MAX3680/MAX3680A is available in the extendedindustrial temperature range (-40°C to +85°C), in a 28pin SSOP package.
__________________________Applications
622Mbps SDH/SONET Transmission Systems
622Mbps ATM/SONET Access Nodes
Add/Drop Multiplexers
Digital Cross-Connects
______________________________Features
♦♦
Single +3.3V Supply
♦♦
622Mbps Serial to 77Mbps Parallel Conversion
♦♦
165mW Power
♦♦
Synchronization Input for Data Realignment and
Reframing (MAX3680)
♦♦
Differential 3.3V PECL Clock and Data Inputs
♦♦
TTL Data Outputs
MAX3680/MAX3680A
+3.3V, 622Mbps, SDH/SONET
1:8 Deserializer with TTL Outputs
________________________________________________________________
Maxim Integrated Products
1
___________________________________________________________________Typical Operating Circuit
19-1210; Rev 3; 3/07
________________Ordering Information
Pin Configuration appears at end of data sheet.
EVALUATION KIT
AVAILABLE
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
+
Denotes lead-free package.
PART TEMP RANGE PIN-PACKAGE
MAX3680EAI -40°C to +85° C 28 SSOP
MAX3680EAI+ -40°C to +85°C 28 SSOP
MAX3680AEAI -40°C to +85°C 28 SSOP
= +3.3V
V
CC
VCC = +3.3V
PHOTODIODE
PREAMP
MAX3664
THIS SYMBOL REPRESENTS A TRANSMISSION LINE OF CHARACTERISTIC IMPEDANCE Z0 = 50Ω.
100Ω
MAX3675
LIMITING
AMP
DATA
AND
CLOCK
RECOVERY
VCC = +3.3V
130Ω 130Ω
82Ω 82Ω
VCC = +3.3V
130Ω 130Ω
82Ω 82Ω
SD+
SD-
SCLK+
SCLK-
V
CC
MAX3680/
MAX3680A
GND
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
PCLK
SYNC
OVERHEAD
TERMINATION
MAX3680/MAX3680A
+3.3V, 622Mbps, SDH/SONET
1:8 Deserializer with TTL Outputs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC= +3.0V to +3.6V, TA= -40°C to +85°C, unless otherwise noted. Typical values are at VCC= +3.3V, TA= +25°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.
Note 2: AC characteristics guaranteed by design and characterization.
Note 1: The SYNC input is available only on the MAX3680.
Terminal Voltage (with respect to GND)
V
CC
........................................................................-0.5V to +5V
PECL Inputs (SD+/-, SCLK+/-) ................-0.5V to (V
CC
+ 0.5V)
TTL Input (SYNC) ....................................-0.5V to (V
CC
+ 0.5V)
TTL Outputs (PCLK, PD_)........................-0.5V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +85°C)
SSOP (derate 9.52mW/°C above +85°C) .....................619mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
TTL outputs = high
VIN= V
IL(MAX)
VIN= V
IH(MAX)
VIN= V
IH(MAX)
VIN= V
IL(MAX)
Output sinking = 400µA
Output sourcing = 400µA
CONDITIONS
V0 0.44V
OL
Output Low Voltage
V2.4 V
CC
V
OH
Output High Voltage
VVCC- 1.16 VCC- 0.88V
IH
Input High Voltage
mA25 50 90I
CC
Supply Current
µA-10 10I
IL
Input Low Current
µA-10 10I
IH
Input High Current
V0.8V
IL
Input Low Voltage
V2.0V
IH
Input High Voltage
VVCC- 1.81 VCC- 1.48V
IL
Input Low Voltage
µA-10 10I
IH
Input High Current
µA-10 10I
IL
Input Low Current
UNITSMIN TYP MAXSYMBOLPARAMETER
CONDITIONS
ps50t
H
Serial Data Hold Time
ps800t
SU
MHz622f
SCLK
Maximum Serial Clock Frequency
Serial Data Setup Time
UNITSMIN TYP MAXSYMBOLPARAMETER
PECL INPUTS (SD+/-, SCLK+/-)
TTL INPUT AND OUTPUTS (SYNC, PCLK, PD_) (Note 1)
AC ELECTRICAL CHARACTERISTICS
(VCC= +3.0V to +3.6V, TA= +25°C, unless otherwise noted.) (Note 2)
VCC= +3.3V, CL= 18pF ps-200 500 2000t
CLK-Q
Parallel Clock to Data Output Delay
MAX3680/MAX3680A
+3.3V, 622Mbps, SDH/SONET
1:8 Deserializer with TTL Outputs
_______________________________________________________________________________________
3
__________________________________________Typical Operating Characteristics
(VCC= +3.0V to +3.6V, unless otherwise noted.)
MAXIMUM SERIAL-CLOCK FREQUENCY
1.3
1.2
1.1
1.0
0.9
SERIAL CLOCK FREQUENCY (GHz)
0.8
-50
vs. TEMPERATURE
0
-25
TEMPERATURE (°C)
25 50
400
MAX3680-01
360
320
280
SERIAL DATA-SETUP TIME (ps)
240
100
75
200
SERIAL DATA SETUP TIME
vs. TEMPERATURE
0
-25
-50
TEMPERATURE (°C)
25 50
MAX3680-02
100
75
SERIAL DATA HOLD TIME
vs. TEMPERATURE
-100
-160
-220
-280
SERIAL DATA-HOLD TIME (ps)
-340
-400
-50
-25
TEMPERATURE (°C)
0
25 50
SUPPLY CURRENT
vs. TEMPERATURE
70
MAX3680-03
100
75
60
50
40
30
20
SUPPLY CURRENT (mA)
10
0
-50
VCC = +3.6V
VCC = +3.0V
-25
TEMPERATURE (°C)
VCC = +3.3V
25 50
0
MAX3680-04
100
75
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