Maxim MAX3690ECJ Datasheet
General Description
The MAX3690 serializer is ideal for converting 8-bitwide, 77Mbps parallel data to 622Mbps serial data in
ATM and SDH/SONET applications. Operating from a
single +3.3V supply, this device accepts TTL clock and
data inputs, and delivers a 3.3V differential PECL serialdata output. A fully integrated PLL synthesizes an internal 622MHz serial clock from a low-speed crystal
reference clock (77.76MHz, 51.84MHz, or 38.88MHz).
The MAX3690 is available in the extended-industrial
temperature range (-40°C to +85°C) in a 32-pin TQFP
package.
________________________Applications
622Mbps SDH/SONET Transmission Systems
622Mbps ATM/SONET Access Nodes
Add/Drop Multiplexers
Digital Cross Connects
____________________________Features
♦ Selectable Reference Clock Frequency:
77.76MHz, 51.84MHz, or 38.88MHz
♦ Single +3.3V Supply
♦ 77Mbps (8-bit) Parallel to 622Mbps Serial
Conversion
♦ Clock Synthesis for 622Mbps Serial Data
♦ 200mW Power
♦ TTL Parallel Clock and Data Inputs
♦ Differential 3.3V PECL Serial-Data Output
MAX3690
+3.3V, 622Mbps, SDH/SONET 8:1 Serializer
with Clock Synthesis and TTL Inputs
________________________________________________________________
Maxim Integrated Products
1
MAX3690
MAX3668
SD-
GND
PCLKO
38.88MHz TTL CRYSTAL
REFERENCE
PCLKI RCLK V
CC
CKSET
SD+
FIL-
FIL+
130Ω 130Ω
82Ω
82Ω
V
CC
= +3.3V
V
CC
= +3.3V
V
CC
= +3.3V
OVERHEAD
GENERATION
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
THIS SYMBOL REPRESENTS A TRANSMISSION LINE
OF CHARACTERISTIC IMPEDANCE (Z
0
= 50Ω).
1µF
1µF
Typical Operating Circuit
19-4774; Rev 1; 4/99
PART
MAX3690ECJ -40°C to +85°C
TEMP. RANGE PIN-PACKAGE
32 TQFP
Ordering Information
Pin Configuration appears at end of data sheet.
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX3690
+3.3V, 622Mbps, SDH/SONET 8:1 Serializer
with Clock Synthesis and TTL Inputs
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC= +3.0V to +3.6V, PECL loads = 50Ω ±1% to (VCC- 2V), TA= -40°C to +85°C, unless otherwise noted. Typical values are at
V
CC
= +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.
Note 2: All TTL thresholds set to V
CC
/ 2.
Terminal Voltage (with respect to GND)
V
CC
.......................................................................-0.5V to +5V
All Inputs, FIL-, FIL+, PCLKO.................-0.5V to (V
CC
+ 0.5V)
Output Current
PECL Outputs (SD±).......................................................50mA
Continuous Power Dissipation (T
A
= +85°C)
TQFP (derate 10.2mW/°C above +85°C).....................663mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range.............................-60°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
T
A
= 0°C to +85°C
PECL outputs unterminated
IOL= -400µA
IOH= 400µA
VIN= 0
VIN= V
CC
TA= 0°C to +85°C
CONDITIONS
VCC- 1.025 VCC- 0.88
mA60 100I
CC
Supply Current
V0.44V
OL
Output Low Voltage
V2.4V
OH
Output High Voltage
µA-10 10I
IL
Input Low Current
µA-10 10I
IH
Input High Current
VCC- 1.81 VCC- 1.62
V2.0V
IH
Input High Voltage
V0.8V
IL
Input Low Voltage
UNITSMIN TYP MAXSYMBOLPARAMETER
C
LOAD
= 15pF, V
OUT
= 0.8V to 2.0V
C
LOAD
= 15pF, V
OUT
= 0.8V to 2.0V
CONDITIONS
ps1000t
H
Parallel Data Hold Time
ps1200t
SU
MHz622.08f
SCLK
Serial Clock Rate
Parallel Data Setup Time
ns550t
F
TTL Output Fall Time
ns650t
R
TTL Output Rise Time
ns0 5.0t
SKEW
Allowable Parallel Clock Output
to Parallel Clock Input Delay
ps
RMS
11
Φ
0
Output Random Jitter
UNITSMIN TYP MAXSYMBOLPARAMETER
AC ELECTRICAL CHARACTERISTICS
(VCC= +3.0V to +3.6V, PECL loads = 50Ω ±1% to (VCC- 2V), all TTL thresholds set to VCC/2, TA= -40°C to +85°C, unless otherwise
noted. Typical values are at V
CC
= +3.3V, TA= +25°C.) (Note 1)
CKSET = 0 or V
CC
µA500I
CKSET
CKSET Input Current
TA= -40°C
V
VCC- 1.085 VCC- 0.88
V
OH
Output High Voltage
TA= -40°C
V
VCC- 1.83 VCC- 1.555
V
OL
Output Low Voltage
PECL OUTPUTS (SD±)
TTL INPUTS AND OUTPUTS (PCLKI, RCLK, PCLKO, PD_)
20% to 80% ps200t
R, tF
PECL Differential Output
Rise/Fall Time
MAX3690
+3.3V, 622Mbps, SDH/SONET 8:1 Serializer
with Clock Synthesis and TTL Inputs
_______________________________________________________________________________________
3
45
55
50
65
60
70
75
SUPPLY CURRENT vs. TEMPERATURE
MAX3690-01
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
-50 25-25 0 50 75
100
-95
-80
-85
-90
-70
-75
-60
-65
-55
PARALLEL DATA SETUP TIME
vs. TEMPERATURE
MAX3690-02
TEMPERATURE (¡C)
PARALLEL DATA SETUP TIME (ps)
-40 25
-25
0507585
230
245
240
235
255
250
265
260
270
-40 25-25 0 50 75 85
PARALLEL DATA HOLD TIME
vs. TEMPERATURE
MAX3690-03
TEMPERATURE (°C)
PARALLEL DATA HOLD TIME (ps)
-5
0
5
10
15
00-50 50 100
ALLOWED PCLKO to PCLKI SKEW
vs. TEMPERATURE
MAX3690-07
TEMPERATURE (°C)
TIME (ns)
2mV/
div
5ps/div
SERIAL DATA RANDOM JITTER
(R
CLKI
= 77.76MHz)
MAX3690-05
TEMPERATURE (°C)
VCC = 3.3V
RJ = 4.66ps
RMS
__________________________________________Typical Operating Characteristics
(VCC= +3.3V, TA= +25°C, unless otherwise noted.)
100mV/
div
200ps/div
SERIAL-DATA OUTPUT EYE DIAGRAM
(622Mbps, PRBS)
MAX3690-08
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