ZL40255 Series

Programmable 1:3 Multi-format Buffer

Catalog

Programmable 1:3 Multi-format Buffer

Part	Mounting Type	Number of Circuits	Operating Temperature [Max]	Operating Temperature [Min]	Supplier Device Package	Output	Ratio - Input:Output	Type	Input	Voltage - Supply [Max]	Voltage - Supply [Min]	Frequency - Max [Max]	Package / Case
Microchip Technology ZL40255LDF1	Surface Mount	1	85 °C	-40 °C	32-QFN (5x5)	CML, CMOS, HCSL, HSTL, LVDS, LVPECL, SSTL	4:3	Divider, Fanout Buffer (Distribution), Multiplexer	CMOS, Crystal	3.465 V	1.71 V	1.035 GHz	32-VFQFN Exposed Pad
Microchip Technology ZL40255LDG1
Microchip Technology ZL40255LDG1	Surface Mount	1	85 °C	-40 °C	32-QFN (5x5)	CML, CMOS, HCSL, HSTL, LVDS, LVPECL, SSTL	4:3	Divider, Fanout Buffer (Distribution), Multiplexer	CMOS, Crystal	3.465 V	1.71 V	1.035 GHz	32-VFQFN Exposed Pad

Catalog

Programmable 1:3 Multi-format Buffer

Key Features

• * Four Input Clocks: one crystal/CMOS input, two differential/CMOS inputs, one single-ended/CMOS input

• * Any input frequency up to 1035MHz (up to 300MHz for CMOS)

• * Clock selection by pin or register control

• * Up to 3 Differential Outputs (Up to 6 CMOS)

• * Output frequencies are any integer divisor up to 232 of the input frequency (CMOS 250MHz max)

• * Each output has independent dividers

• * Low additive jitter <200fs RMS (12kHz-20MHz, for input frequencies above 100MHz)

• * Outputs are CML or 2xCMOS, can interface to LVDS, LVPECL, HSTL, SSTL and HCSL

• * In 2xCMOS mode, the P and N pins can be different frequencies (e.g. 125MHz and 25MHz)

• * Per-output supply pin with CMOS output voltages from 1.5V to 3.3V

• * Precise output alignment circuitry and per-output phase adjustment

• * Per-output enable/disable and glitch-less start/stop (stop high or low)

• * Automatic self-configuration at power-up from internal EEPROM; up to four configurations, pin-selectable

• * Crystal interface for frequency synthesis up to 60MHz

• * Four general-purpose I/O pins, each with many status and control options

• * SPI or I2C processor Interface

• * Tiny 5x5mm QFN package

Description

The ZL40255 SmartBuffer™ is a flexible, programmable fanout buffer IC. The ZL40255 can select from 1 of 4 input clocks and provide as many as 3 differential or 6 CMOS outputs. Each output can provide format conversion, integer frequency division, and skew adjustment. Flexible any-format outputs simplify design. Automatic self-configuration after power-up or reset.