Philips Semiconductors
10-bit DDR SDRAM mux/bus switch
Product data
CBTV4010
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
This 10-bit bus switch is designed for 2.3 V to 2.7 V VCC operation
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
tPLH
tPHL
CIN
CON
ICCZ
Propagation delay
An to Yn
Input capacitance – control pins
Channel on capacitance
Total supply current
CONDITIONS
Tamb = 25 °C; GND = 0 V
CL = 7 pF; VCC = 2.5 V
VI = 0 V or VCC
Vin = 1.5 V
VCC = 2.5 V
TYPICAL
140
1.8
7
500
UNIT
ps
pF
pF
µA
ORDERING INFORMATION
www.DataSheet4U.comPACKAGES
TFBGA64 (Thin Fine Pitch BGA)
TEMPERATURE RANGE
0 to +85 °C
ORDER CODE
CBTV4010EE
DWG NUMBER
SOT746-1
2002 Feb 19
2 853-2315 27756
