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MAX3964A

Description
+3.0V to +5.5V, 125Mbps to 266Mbps Limiting Amplifiers with Loss-of-Signal Detector
File Size809KB,12 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet View All

MAX3964A Overview

+3.0V to +5.5V, 125Mbps to 266Mbps Limiting Amplifiers with Loss-of-Signal Detector

19-1314; Rev 3; 9/04
+3.0V to +5.5V, 125Mbps to 266Mbps
Limiting Amplifiers with Loss-of-Signal Detector
General Description
The MAX3969 is a recommended upgrade for the
MAX3964, MAX3965, and MAX3968. The MAX3964A lim-
iting amplifier, with 2mV
P-P
input sensitivity and PECL
data outputs, is ideal for low-cost ATM, FDDI, and Fast
Ethernet fiber optic applications.
The MAX3964A features an integrated power detector
that senses the input-signal power. It provides a
received-signal-strength indicator (RSSI), which is an
analog indication of the power level and complementary
PECL loss-of-signal (LOS) outputs, which indicate when
the power level drops below a programmable threshold.
The threshold can be adjusted to detect signal ampli-
tudes as low as 2.7mV
P-P
. An optional squelch function
disables switching of the data outputs by holding them at
a known state during an LOS condition.
The MAX3965 provides the same functionality, but offers
TTL-compatible LOS outputs. The MAX3968 provides the
same functionality as the MAX3964A, but has data-output
edge speed suitable for ESCON and 266Mbps fibre
channel applications.
The MAX3964A/MAX3965/MAX3968 are available in die
form, as tested wafers, and in 20-pin QSOP packages.
The MAX3964AETP is available in a 20-pin thin QFN
package.
Single Supply: +3.0V to +5.5V
2mV
P-P
Input Sensitivity
1.2ns Output Edge Speed
Loss-of-Signal Detector with Programmable
Threshold
Analog Received-Signal-Strength Indicator
Output Squelch Function
Choice of TTL or PECL LOS Outputs
Compatible with 4B/5B Data Coding
IT
TION K
VALUA
E
BLE
AVAILA
Features
MAX3964A/MAX3965/MAX3968
Ordering Information
PART
MAX3964CEP
MAX3964C/D
MAX3964C/DW
MAX3964AETP
MAX3964AC/D
MAX3965CEP
MAX3965C/D
MAX3965C/DW
MAX3968CEP
MAX3968C/D
MAX3968C/DW
TEMP RANGE
0 C to +70 C
0
o
C to +70
o
C
0 C to +70 C
-40 C to +85 C
-40
o
C to +85
o
C
0 C to +70 C
0 C to +70 C
0
o
C to +70
o
C
0 C to +70 C
0
o
C to +70
o
C
0 C to +70 C
o
o
o
o
o
o
o
o
o
o
o
o
o
o
PIN-PACKAGE
20 QSOP
Dice*
Wafers*
20 Thin QFN**
Dice*
20 QSOP
Dice*
Wafers*
20 QSOP
Dice*
Wafers*
Applications
125Mbps FDDI Receivers
155Mbps LAN ATM Receivers
Fast Ethernet Receivers
ESCON Receivers
155Mbps FTTx Receivers
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.
*Dice
and wafers are designed to operate over a 0°C to +100°C
junction temperature (Tj) range, but are tested and guaranteed
only at T
A
= +25°C.
**Package
Code: T2044-1
Typical Operating Circuit
V
CC
10nF
V
CC
V
CC
PHOTODIODE
C
IN
10nF
155Mbps
TIA
OUT-
OUT+
IN
GND
(MAX3965 ONLY)
C
IN
10nF
R1
≥100k
GNDO
INV
IN-
IN+
FILTER
10nF
V
CC
FILTER
V
CC0
CZP
CZN
RSSI
SQUELCH
LOS+
V
CC
C
AZ
27nF
LOS TERMINATIONS
ARE USED ONLY
FOR THE MAX3964
AND MAX3968
MAX3964A
LOS-
MAX3965
MAX3968
OUT-
OUT+
SUB*
GND
V
TH
50
50Ω
50Ω
50Ω
R2
V
CC
- 2V
*PIN NOT AVAILABLE ON MAX3964AETP.
________________________________________________________________
Maxim Integrated Products
1
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.
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