MAX3964 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 1; 10/02
EVAALVUAAILTAIOBNLEKIT
+3.0V to +5.5V, 125Mbps to 266Mbps
Limiting Amplifiers with Loss-of-Signal Detector
General Description
The MAX3964 limiting 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 MAX3964 features an integrated power detector that
senses the input-signal power. It provides a received-sig-
nal-strength indicator (RSSI), which is an analog indica-
tion 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 amplitudes as
low as 2.7mVp-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 pro-
vides the same functionality as the MAX3964, but has
data-output edge speed suitable for ESCON and
266Mbps fibre channel applications.
The MAX3964/MAX3965/MAX3968 are available in die
form, as tested wafers, and in 20-pin QSOP packages.
The MAX3964ETP 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
MAX3964CEP
MAX3964C/D
MAX3964C/DW
MAX3964ETP
MAX3965CEP
MAX3965C/D
MAX3965C/DW
MAX3968CEP
MAX3968C/D
MAX3968C/DW
TEMP RANGE
0^oC to +70^oC
0^oC to +70^oC
0^oC to +70^oC
-40^oC to +85^oC
0^oC to +70^oC
0^oC to +70^oC
0^oC to +70^oC
0^oC to +70^oC
0^oC to +70^oC
0^oC to +70^oC
PIN-PACKAGE
20 QSOP
Dice*
Wafers*
20 Thin QFN
20 QSOP
Dice*
Wafers*
20 QSOP
Dice*
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.
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
MAX3964 ^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 MAX3964ETP.
________________________________________________________________ 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.