描述 Description

The SY89823L is a high-performance bus clock driver with 22 differential High-Speed Transceiver Logic (HSTL), 1.5V compatible output pairs. The device is designed for use in low-voltage (3.3V/1.8V) applications that require a large number of outputs to drive precisely aligned, ultra-low skew signals to their destination. The input is multiplexed from either HSTL or Low-Voltage Positive- Emitter-Coupled Logic (LVPECL) by the CLK_SEL pin.The Output Enable (OE) is synchronous and triple-buffered so that the outputs will only be enabled/disabled when they are already in the LOW state. This avoids any potential of generating a runt clock pulse when the device is enabled/disabled, as can occur with an asynchronous control. The triple-buffering feature provides a threeclock delay from the time the OE input is asserted/de-asserted to when the clock appears at the outputs.The SY89823L features low pin-to-pin skew (50ps max.) and low part-to-part skew (200ps max.), performance previously unachievable in a standard product having such a high number of outputs. The SY89823L is available in a single, space-saving package, enabling a lower overall cost solution.

特性 Features

? 22 differential HSTL (low-voltage swing) output pairs
? HSTL outputs drive 50Ω to ground with no offset voltage
? 3.3V core supply, 1.8V output supply for reduced power
? LVPECL and HSTL inputs
? Low part-to-part skew (200ps max.)
? Low pin-to-pin skew (50ps max.)
? Triple-buffered output enable (OE)
? -40°C to +85°C temperature range
? Available in a 64-pin EPAD-TQFP

簡(jiǎn)介

SY89823L屬于集成電路（IC）的時(shí)鐘緩沖器驅(qū)動(dòng)器。由制造生產(chǎn)的SY89823L時(shí)鐘緩沖器，驅(qū)動(dòng)器時(shí)鐘緩沖器和驅(qū)動(dòng)器集成電路產(chǎn)品族中的產(chǎn)品用于幫助信號(hào)在系統(tǒng)中傳輸，常用作頻率/時(shí)間參考信號(hào)，以同步系統(tǒng)內(nèi)的活動(dòng)。盡管這些器件最常用到的功能就是緩沖（即，為使信號(hào)不受驅(qū)動(dòng)負(fù)載的影響而從某個(gè)信號(hào)源復(fù)制信號(hào)），但是該產(chǎn)品族中的某些器件還能執(zhí)行其他功能，例如選擇性改變緩沖信號(hào)路徑、按某個(gè)整數(shù)值分割信號(hào)頻率，或進(jìn)行所用電信號(hào)格式轉(zhuǎn)換。