SN74SSTVF32852 - 24-Bit to 48-Bit Registered Buffer with SSTL_2 Inputs and Outputs

This 24-bit to 48-bit registered buffer is designed for 2.3-V to 2.7-V V_CC operation.

All inputs are SSTL_2, except the LVCMOS reset (RESET)\ input. All outputs are edge-controlled circuits, optimized for unterminated DIMM loads, and meet SSTL_2 Class I specifications.

The SN74SSTVF32852 operates from a differential clock (CLK and CLK\). Data are registered at the crossing of CLK going high and CLK\ going low.

The device supports low-power standby operation. When RESET\ is low, the differential input receivers are disabled, and undriven (floating) data, clock, and reference voltage (V_REF) inputs are allowed. In addition, when RESET\ is low, all registers are reset and all outputs are forced low. The LVCMOS RESET\ input always must be held at a valid logic high or low level.

To ensure defined outputs from the register before a stable clock has been supplied, RESET\ must be held in the low state during power up.

Products containing the "SN74SSTVF32852" keyword are: SN74SSTVF32852KR , SN74SSTVF32852KR

• Member of the Texas Instruments Widebus™ Family
• Operates at 2.3 V to 2.7 V for PC1600, PC2100, and PC2700; 2.5 V to 2.7 V for PC3200
• Pinout and Functionality Compatible With JEDEC Standard SSTV32852
• Pinout Optimizes 1U DDR DIMM Layout
• 600 ps Faster (Simultaneous Switching) Than the JEDEC Standard SSTV32852 in PC2700 DIMM Applications
• 1-to-2 Outputs Support Stacked DDR DIMMs
• One Device Per DIMM Required
• Output Edge-Control Circuitry Minimizes Switching Noise in an Unterminated Line
• Outputs Meet SSTL_2 Class I Specifications
• Supports SSTL_2 Data Inputs
• Differential Clock (CLK and CLK\) Inputs
• Supports LVCMOS Switching Levels on the RESET\ Input
• RESET\ Input Disables Differential Input Receivers, Resets All Registers, and Forces All Outputs Low
• Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
• ESD Protection Exceeds JESD 22
  • 2000-V Human-Body Model (A114-A)
  • 200-V Machine Model (A115-A)
  • 1000-V Charged-Device Model (C101)

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