Datasheet

General Description
The MAX3690 serializer is ideal for converting 8-bit-
wide, 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 serial-
data output. A fully integrated PLL synthesizes an inter-
nal 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 2; 7/04
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 [phone].
For small orders, phone [phone].
MAX3690ECJ+ -40°C to +85°C 32 TQFP
+Denotes lead-free package.