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MAX3877 Datasheet

  • MAX3877

  • " 2.5Gbps, +3.3V Clock and Data Retiming ICs with Vertical T...

  • 550.94KB

  • Maxim   Maxim

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19-2062; Rev 0; 5/01
2.5Gbps, +3.3V Clock and Data Retiming ICs
with Vertical Threshold Adjust
General Description
The MAX3877/MAX3878 are compact, low-power clock
recovery and data retiming ICs for 2.488Gbps SONET/
SDH applications. The fully integrated phase-locked
loop (PLL) recovers a synchronous clock signal from
the serial NRZ data input, which is retimed by the
recovered clock. An additional 2.488Gbps serial input
is available for system loopback diagnostic testing, or
this input can be connected to a 155MHz reference
clock to maintain a valid clock output in the absence of
data transitions. The MAX3877/MAX3878 provide verti-
cal threshold and phase-adjust control to optimize sys-
tem BER in DWDM applications.
These devices provide both loss-of-lock (LOL) and
loss-of-signal (LOS) monitors. Differential CML outputs
are provided for both clock and data signals on the
MAX3877, and differential PECL outputs are provided
for clock and data signals on the MAX3878.
The MAX3877/MAX3878 are designed for both section-
regenerator and terminal-receiver applications in OC-
48/STM-16 transmission systems. Their jitter performance
exceeds all of the SONET/SDH specifications. These
devices operate from a single +3.0V to +3.6V supply over
a -40擄C to +85擄C temperature range. Typical power con-
sumption is only 540mW with a +3.3V supply (MAX3878).
They are available in a 32-pin TQFP-EP package with an
exposed pad, as well as in die form.
Features
o
Exceeds ANSI, ITU, and Bellcore SONET/SDH
Specifications
o
Adjustable Input Threshold (鹵180mV)
o
10mVp-p to 1.2Vp-p Differential Input Range
o
540mW Power Dissipation (at +3.3V)
o
Fully Integrated Clock Recovery and Data
Retiming
o
Optional Holdover Capability (Using External
Reference Clock)
o
0.003UI
RMS
Clock Jitter Generation
o
Tolerates >2000 Consecutive Identical Digits
o
Additional 2.488Gbps Input for Diagnostic
Loopback Testing
o
Differential PECL or CML Data and Clock Outputs
o
Loss-of-Signal Indicator
o
Loss-of-Lock Indicator
MAX3877/MAX3878
Ordering Information
PART
MAX3877EHJ
MAX3877E/D***
MAX3878EHJ
MAX3878E/D***
TEMP. RANGE
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
32 TQFP-EP*
DICE**
32 TQFP-EP*
DICE**
Applications
Long Haul and Metro Systems with
Optical Amplification
DWDM Transmission Systems
SONET/SDH Receivers and Regenerators
Add/Drop Multiplexers
Digital Cross-Connects
SONET/SDH Test Equipment
* Exposed pad
** Dice are designed to operate over this range, but are tested
and guaranteed at T
A
= +25擄C only. contact factory for avail-
ability.
*** Future product鈥攃ontact factory for availability.
Pin Configuration
CPWD+
CPWD-
TOP VIEW
PHADJ
GND
FIL+
LOS
26
32
GND
THADJ
V
CC
SDI-
SDI+
V
CC
SIS
LREF
1
2
3
4
5
6
7
8
9
GND
31
30
29
28
27
LOL
25
24
V
CC
23
SDO+
22
SDO-
21
V
CC
20
V
CC
19
SCLKO+
18
SCLKO-
17
V
CC
16
GND
MAX3877
MAX3878
FIL-
10
GND
11
V
CC
12
SLBI-
13
SLBI+
14
V
CC
15
V
CC
Typical Operating Circuit appears at end of data sheet.
TQFP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

MAX3877 PDF文件相關(guān)型號(hào)

MAX3877EHJ,MAX3878,MAX3878EHJ

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