MAX3768：+3.0V to +5.5V, 1.25Gbps/2.5Gbps Limiting Amplifiers

Limiting Amplifier with Squelch Function Generates Low Deterministic Jitter

The 1.25Gbps MAX3264/MAX3268/MAX3768 and the 2.5Gbps MAX3265/MAX3269/MAX3765 limiting amplifiers are designed for Gigabit Ethernet and Fibre Channel optical receiver systems. The amplifiers accept a wide range of input voltages and provide constant-level output voltages with controlled edge speeds. Additional features include RMS power detectors with programmable loss-of-signal (LOS) indication, an optional squelch function that mutes the data output signal when the input voltage falls below a programmable threshold, and excellent jitter performance. The MAX3264/MAX3265/MAX3765 feature current-mode logic (CML) data outputs that are tolerant of inductive connectors and a 16-pin TSSOP package, making these circuits ideal for GBIC receivers. The MAX3268/ MAX3269/MAX3768 feature standards-compliant positive-referenced emitter-coupled logic (PECL) data outputs and are available in a tiny 10-pin µMAX® package that is ideal for small-form-factor (SFF) receivers.

Key Features

+3.0V to +5.5V Supply Voltage
Low Deterministic Jitter
- 14ps (MAX3264)
- 11ps (MAX3265/MAX3765)
  - 150ps (max) Edge Speed (MAX3265/MAX3765)
  - 300ps (max) Edge Speed (MAX3264)
  - Programmable Signal-Detect Function
  - Choice of CML or PECL Output Interface
  - 10-Pin µMAX or 16-Pin TSSOP Package

MAX3264, MAX3265, MAX3268, MAX3269, MAX3765, MAX3768: Typical Operating Circuit

Applications/Uses

ATM Optical Receivers
Fibre Channel Optical Receivers
Gigabit Ethernet Optical Receivers
System Interconnect

DataSheet

title	Download file
MAX3264-MAX3765 Data Sheet	MAX3264-MAX3765.pdf

Parametrics

Part Number	Target Oper. Range (Gbps)	Data Rate (Mbps)	Data Rate (Mbps)	V_SUPPLY (V)	I_CC (mA)	I/O Type	Input Sens. (mV)	LOS Sens. (mV)	Edge Speed (ps)	Package/Pins	Budgetary Price
Part Number	Target Oper. Range (Gbps)	min	max	V_SUPPLY (V)	typ	I/O Type	Input Sens. (mV)	min	max	Package/Pins	See Notes
MAX3268	1 to 4.5	1062	1250	3.3 5	62	PECL	5	1.2	300	µMAX-EP/10	$4.44 @1k
MAX3768	1 to 4.5	1062	1250	3.3 5	39	PECL	5	1.2	300	µMAX-EP/10	$2.56 @1k

Design kits & evaluation modules

Ordering Information

Part Number	Status	Recommended Replacement	Package	Temp	RoHS
MAX3768C/D	No Longer Available				See data sheet
MAX3768CUB	No Longer Available	MAX3768CUB+	µMAX-EP,;10 pin;26 mm²	0°C to +70°C	No
MAX3768CUB+	Active		µMAX-EP,;10 pin;26 mm²	0°C to +70°C	Lead Free
MAX3768CUB+T	Active		µMAX-EP,;10 pin;26 mm²	0°C to +70°C	Lead Free
MAX3768CUB-T	No Longer Available	MAX3768CUB+T	uMAX;10 pin	0°C to +70°C	See data sheet

MAX3264-MAX3765.pdf MAX3768