Philips Semiconductors

Product data

CBTV4010

10-bit DDR SDRAM mux/bus switch

2

2002 Feb 19

853-2315 27756

FEATURES

• Enable signal is SSTL_2 compatible

• Optimized for use in Double Data Rate (DDR) SDRAM

applications

• Designed to be used with 400 Mbps/200 MHz DDR data bus

• Switch on resistance is designed to eliminate the need for series

resistor to DDR SDRAM

• 20 Ω on resistance

• Internal 100 Ω pull-down resistors

• Low differential skew

• Matched rise/fall slew rate

• Low cross-talk data-data/data-DQM

• Independent DIMM control lines

• Latch-up protection exceeds 500 mA per JESD78

• ESD protection exceeds 2000 V HBM per JESD22-A114,

200 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101

DESCRIPTION

and SSTL_2 select input levels.

Each Host port pin is multiplexed to one of four DIMM port pins.

When the S pin is low the corresponding 10-bit bus switch is turned

on. The on-state connects the Host port to the DIMM port through a

20

Ω nominal series resistance. When the S pin is high the switch is

open and a high-impedance state exists between the two ports. The

DIMM port is terminated with a 100

Ω resistor to ground when the

S pin is high. The design is intended to have only one DIMM port

active at any time.

The part incorporates a very low cross-talk design. It has a very low

skew between outputs (< 50 ps) and low skew (< 50 ps) for rising

and falling edges. The part has optional performance in DDR data

bus applications.

Each switch has been optimized for connection to 1 or 2-bank

DIMMs.

The low internal RC time constant of the switch (20

Ω × 7 pF) allows

data transfer to be made with minimal propagation delay.

The CBTV4010 is characterized for operation from 0 to +85

°C.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

Propagation delay

An to Yn

140

ps

Input capacitance – control pins

1.8

pF

Channel on capacitance

7

pF

Total supply current

500

µA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

ORDER CODE

DWG NUMBER

TFBGA64 (Thin Fine Pitch BGA)

0 to +85

°C

CBTV4010EE

SOT746-1