MAX3878EHJ Maxim Integrated Products, MAX3878EHJ Datasheet

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MAX3878EHJ

Manufacturer Part Number
MAX3878EHJ
Description
Timers & Support Products 2.5Gbps, +3.3V Clock and Data Retiming I
Manufacturer
Maxim Integrated Products
Type
Clock and Data Retimingr
Datasheet

Specifications of MAX3878EHJ

Supply Voltage (max)
3.6 V
Supply Voltage (min)
3 V
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Supply Current
163 mA
Package / Case
TQFP-32 EP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MAX3878EHJ
Manufacturer:
Maxim Integrated
Quantity:
10 000
Part Number:
MAX3878EHJ-T
Manufacturer:
Maxim Integrated
Quantity:
10 000
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°C to +85°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.
19-2062; Rev 0; 5/01
Typical Operating Circuit appears at end of data sheet.
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.
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
2.5Gbps, +3.3V Clock and Data Retiming ICs
________________________________________________________________ Maxim Integrated Products
General Description
Applications
with Vertical Threshold Adjust
o Exceeds ANSI, ITU, and Bellcore SONET/SDH
o Adjustable Input Threshold (±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
o Optional Holdover Capability (Using External
o 0.003UI
o Tolerates >2000 Consecutive Identical Digits
o Additional 2.488Gbps Input for Diagnostic
o Differential PECL or CML Data and Clock Outputs
o Loss-of-Signal Indicator
o Loss-of-Lock Indicator
*** Future product—contact factory for availability.
** Dice are designed to operate over this range, but are tested
MAX3877EHJ
MAX3877E/D***
MAX3878EHJ
MAX3878E/D***
Specifications
Retiming
Reference Clock)
Loopback Testing
* Exposed pad
and guaranteed at T
ability.
PART
THADJ
LREF
GND
SDI+
SDI-
V
V
SIS
RMS
TOP VIEW
CC
CC
1
2
3
4
7
5
6
8
Clock Jitter Generation
32
9
10
31
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
A
Ordering Information
= +25°C only. contact factory for avail-
11
30
TQFP
MAX3877
MAX3878
29
12
Pin Configuration
28
13
14
27
15
26
16
25
PIN-PACKAGE
32 TQFP-EP*
DICE**
32 TQFP-EP*
DICE**
24
23
22
21
20
19
18
17
Features
V
SDO+
SDO-
V
V
SCLKO+
SCLKO-
V
CC
CC
CC
CC
1

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MAX3878EHJ Summary of contents

Page 1

... Loopback Testing o Differential PECL or CML Data and Clock Outputs o Loss-of-Signal Indicator o Loss-of-Lock Indicator PART MAX3877EHJ MAX3877E/D*** MAX3878EHJ MAX3878E/D*** Applications * Exposed pad ** Dice are designed to operate over this range, but are tested and guaranteed at T ability. *** Future product—contact factory for availability. ...

Page 2

... Continuous Power Dissipation (T CC 32-Pin TQFP-EP (derate 22.2mW/°C above +85°C) ..1444mW Operating Temperature Range MAX3877/MAX3878EHJ ..................................-40°C to +85°C Operating Junction Temperature Range (die) ..-55°C to +150°C Storage Temperature Range .............................-65°C to +150°C Processing Temperature (die) .........................................+400°C Lead Temperature (soldering, 10s) .................................+300°C ...

Page 3

Clock and Data Retiming ICs DC ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL THRESHOLD SETTING SPECIFICATION (SDI±) Differential Input Voltage ...

Page 4

Clock and Data Retiming ICs with Vertical Threshold Adjust AC ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V -40°C to +85°C, unless otherwise noted. Typical values are (Note 6) PARAMETER SYMBOL Jitter ...

Page 5

Clock and Data Retiming ICs SDI+ SDI- (SDI+) - (SDI-) Figure 1. Input Amplitude V (mV) TH +207 +180 -153 0.2 -153 -180 -207 Figure 2. Setting the Input Threshold Level _______________________________________________________________________________________ with Vertical Threshold Adjust 5mV MIN ...

Page 6

Clock and Data Retiming ICs with Vertical Threshold Adjust (SDI+) - (SDI-) (mV) +300 (100%) +180 0 (50%) -180 -300 (0%) Figure 3. Definition of Input Threshold (SCLKO+) - (SCLKO-) (SDO+)-(SDO-) Figure 4. Output Clock-to-Q Delay (V = ...

Page 7

Clock and Data Retiming ICs (V = +3.3V +25°C, unless otherwise noted JITTER TOLERANCE vs. INPUT AMPLITUDE 1.0 0.9 JITTER FREQUENCY = 1MHz 0.8 0.7 JITTER FREQUENCY = 5MHz 0.6 0.5 0.4 0.3 0.2 ...

Page 8

Clock and Data Retiming ICs with Vertical Threshold Adjust PIN NAME 1, 9, 10,16, GND Supply Ground 11, 14, 15, 17, 20, V Supply Voltage CC 21, 24 Threshold Control Voltage Input. Used for setting ...

Page 9

Clock and Data Retiming ICs Detailed Description The MAX3877/MAX3878 consist of a fully integrated phase-locked loop (PLL), input amplifier, data retiming block, and CML output buffer (MAX3877) or PECL out- put buffer (MAX3878). The PLL consists of a ...

Page 10

Clock and Data Retiming ICs with Vertical Threshold Adjust PHASE ALIGNMENT vs. PHADJ VOLTAGE 100 50 0 -50 -100 0.2 0.7 1.2 PHADJ VOLTAGE Figure 6. Phase Alignment vs. PHADJ Voltage The internal clock is aligned to the ...

Page 11

Clock and Data Retiming ICs Table 1. Selecting Input Path SIS = 0 SDI LREF = 0 (Normal Operation) (System Loopback Mode) SLBI LREF = 1 (Holdover Mode) H (j2πf) (dB 1.0µ ...

Page 12

Clock and Data Retiming ICs with Vertical Threshold Adjust V CC 50Ω 0.1µF 25Ω SDI+ PECL LEVELS 100Ω 0.1µF SDI- 25Ω MAX3877 Figure 10. Interfacing with PECL Levels V CC 50Ω MAX3877 Figure 11. CML Outputs Jitter Tolerance ...

Page 13

Clock and Data Retiming ICs MAX3864 IN TIA Figure 12. Typical Application Circuit (Interfacing with the MAX3864 TIA without using threshold adjust) Layout Considerations Performance can be significantly affected by circuit board layout and ...

Page 14

Clock and Data Retiming ICs with Vertical Threshold Adjust V CC TIA IN ANALOG INPUT N.C. GND GND GND THADJ V CC SDI+ SDI SIS LRE 14 ______________________________________________________________________________________ V CC 1.0µF 1.0µF GND V FIL+ FIL- ...

Page 15

Clock and Data Retiming ICs with Vertical Threshold Adjust ______________________________________________________________________________________ Package Information 15 ...

Page 16

... Maxim reserves the right to change the circuitry and specifications without notice at any time. implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © ...

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