The VCX16839 contains twenty non-inverting selectable buffered or registered paths. The device can be configured to operate in a registered, or flow through buffer mode by utilizing the register enable (REGE) and Clock (CLK) signals. The device operates in a 20-bit word wide mode. All outputs can be placed into 3-STATE through use of the OE# pin. These devices are ideally suited for buffered or registered 168 pin and 200 pin SDRAM DIMM memory modules.

The 74VCX16839 is designed for low voltage (1.65V to 3.6V) V_CC applications with I/O compatibility up to 3.6V.

The 74VCX16839 is fabricated with an advanced CMOS technology to achieve high speed operation while maintaining low CMOS power dissipation.

• Compatible with PC100 and PC133 DIMM module specifications
• 1.65V-3.6V V_CC supply operation
• 3.6V tolerant inputs and outputs
• t_PD (CLK to O_n)

  3.2 ns max for 3.0V to 3.6V V_CC

  4.4 ns max for 2.3V to 2.7V V_CC

  8.8 ns max for 1.65V to 1.95V V_CC

• Power-off high impedance inputs and outputs
• Supports live insertion and withdrawal (Note 1)
• Static Drive (I_OH/I_OL)

  ±24 mA @ 3.0V V_CC

  ±18 mA @ 2.3V V_CC

  ±6 mA @ 1.65V V_CC

• Uses patented noise/EMI reduction circuitry
• Latch-up performance exceeds 300 mA
• ESD performance:

  Human body model > 2000V

  Machine model > 200V