Maxim MAX3680EAI Datasheet
_________________General Description
The MAX3680 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. It also provides a TTL synchronization input that enables data realignment and reframing.
The MAX3680 is available in the extended-industrial
temperature range (-40°C to +85°C), in a 28-pin 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
♦ Differential 3.3V PECL Clock and Data Inputs
♦ TTL Data Outputs and Synchronization Input
MAX3680
+3.3V, 622Mbps, SDH/SONET
1:8 Deserializer with TTL Outputs
________________________________________________________________
Maxim Integrated Products
1
MAX3675
MAX3664
MAX3680
DATA
AND
CLOCK
RECOVERY
OVERHEAD
TERMINATION
LIMITING
AMP
PREAMP
100Ω
PHOTODIODE
VCC = +3.3V
V
CC
= +3.3V
SD+
SD-
THIS SYMBOL REPRESENTS A TRANSMISSION LINE OF CHARACTERISTIC IMPEDANCE Z0 = 50Ω.
V
CC
GND
130Ω 130Ω
82Ω 82Ω
VCC = +3.3V
130Ω 130Ω
82Ω 82Ω
VCC = +3.3V
SCLK+
SCLK-
SYNC
PCLK
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
___________________________________________________________________Typical Operating Circuit
19-1210; Rev 0; 3/97
PART
MAX3680EAI -40°C to +85°C
TEMP. RANGE PIN-PACKAGE
28 SSOP
________________Ordering Information
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Pin Configuration appears at end of data sheet.
EVALUATION KIT
AVAILABLE
MAX3680
+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 1: AC characteristics guaranteed by design and characterization.
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, 10sec).............................+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
UNITS
MIN TYP MAX
SYMBOLPARAMETER
PECL INPUTS (SD+/-, SCLK+/-)
TTL INPUT AND OUTPUTS (SYNC, PCLK, PD_)
AC ELECTRICAL CHARACTERISTICS
(VCC= +3.0V to +3.6V, TA= +25°C, unless otherwise noted.) (Note 1)
VCC= 3.3V, CL= 18pF ps-200 500 1300t
CLK-Q
Parallel Clock to Data Output Delay
MAX3680
+3.3V, 622Mbps, SDH/SONET
1:8 Deserializer with TTL Outputs
_______________________________________________________________________________________
3
1.2
0
MAXIMUM SERIAL-CLOCK FREQUENCY
vs. TEMPERATURE
MAX3680-01
SERIAL CLOCK FREQUENCY (GHz)
-25
1.1
25 50
1.0
0.9
0.8
75
100
TEMPERATURE (°C)
1.3
-50
360
0
SERIAL DATA-SETUP TIME
vs. TEMPERATURE
MAX3680-02
SERIAL DATA-SETUP TIME (ps)
-25
320
25 50
280
240
200
75
100
TEMPERATURE (°C)
400
-50
340
0
SERIAL DATA-HOLD TIME
vs. TEMPERATURE
MAX3680-03
SERIAL DATA-HOLD TIME (ps)
-25
280
25 50
220
160
100
75
100
TEMPERATURE (°C)
400
-50
60
50
0
SUPPLY CURRENT
vs. TEMPERATURE
MAX3680-04
SUPPLY CURRENT (mA)
-25
40
25 50
30
10
20
0
75
100
TEMPERATURE (°C)
70
-50
VCC = 3.6V
VCC = 3.0V
VCC = 3.3V
__________________________________________Typical Operating Characteristics
(VCC= +3.0V to +3.6V, unless otherwise noted.)
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