General Description

The ICS840272I is a PLL-based Frequency Translator intended for

use in Synchronous Ethernet applications. This high performance

device is optimized to generate 25MHz and 8kHz LVCMOS clock

outputs. The ICS840272I accepts the following differential or

single-ended input signals: 161.1328125MHz (10GbE Mode),

156.25MHz (1GbE Mode), or 125MHz (Recovered clock from

10/100/1000BaseT Ethernet PHY). The extended temperature

range supports telecommunication and networking end equipment

requirements.

Features

• Two single-ended outputs (LVCMOS or LVTTL levels),

output impedance: 17

• Single-ended lock detect output (LVCMOS or LVTTL levels)

• Two selectable differential clock inputs

• Differential input pair (CLKx, nCLKx) accepts LVPECL, LVDS,

LVHSTL, SSTL, HCSL input levels

• Internal resistor bias on nCLK pin allows the user to drive CLK

input with external single-ended (LVCMOS/ LVTTL) input levels

• Selectable input frequencies: 161.1328MHz, 156.25MHz or

125MHz

• Output frequency: 25MHz, 8kHz

• Full 3.3V supply voltage

• -40°C to 85°C ambient operating temperature

• Available in lead-free (RoHS 6) packaging