HD74CDC857 Overview
The HD74CDC857 is a high-performance, low-skew, low-jitter, phase locked loop clock driver. It is specifically designed for use with DDR (Double Data Rate) synchronous DRAMs.
HD74CDC857 Key Features
- Supports 100 MHz to 150 MHz operation range -1
- Distributes one differential clock input pair to ten differential clock outputs pairs
- SSTL_2 (Stub Series Terminated Logic) differential inputs and LVCMOS reset (G) input
- Supports spread spectrum clock
- External feedback pins (FBIN, FBIN) are used to synchronize the outputs to the clock input
- Supports both 3.3 V/2.5V analog supply voltage (AV CC), and 2.5 V VDDQ
- No external RC network required
- Sleep mode detection
- 48pin TSSOP (Thin Shrink Small Outline Package) Note: 1. 200 MHz (Max) ver. will be available by 4Q/’99