MAX3964A Datasheet, PDF (1/12 Pages) Maxim Integrated Products – +3.0V to +5.5V, 125Mbps to 266Mbps Limiting Amplifiers with Loss-of-Signal Detector

19-1314; Rev 3; 9/04
EVAALVUAAILTAIOBNLEKIT
+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.
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.
Features
♦ 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
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX3964CEP
0^oC to +70^oC
20 QSOP
MAX3964C/D
0^oC to +70^oC
Dice*
MAX3964C/DW
0^oC to +70^oC
Wafers*
MAX3964AETP
-40^oC to +85^oC
20 Thin QFN**
MAX3964AC/D
-40^oC to +85^oC
Dice*
MAX3965CEP
0^oC to +70^oC
20 QSOP
MAX3965C/D
0^oC to +70^oC
Dice*
MAX3965C/DW
0^oC to +70^oC
Wafers*
MAX3968CEP
0^oC to +70^oC
20 QSOP
MAX3968C/D
0^oC to +70^oC
Dice*
MAX3968C/DW
0^oC to +70^oC
Wafers*
*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
IN
V_CC
155Mbps
TIA
OUT-
OUT+
GND
(MAX3965 ONLY)
C_AZ
FILTER ^VCC
CZP
27nF
CZN
10nF
FILTER
RSSI
SQUELCH
V_CC0
LOS+
C_IN
10nF
MAX3964A ^LOS-
MAX3965
IN- MAX3968 OUT-
LOS TERMINATIONS
ARE USED ONLY
FOR THE MAX3964
AND MAX3968
50Ω
50Ω
C_IN
10nF
R1
≥100k
IN+
GNDO
INV
OUT+
SUB*
GND
V_TH
50Ω
50Ω
V_CC - 2V
R2
*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.