adg3257 Analog Devices, Inc., adg3257 Datasheet - Page 7

• Manufacturer Part Number: adg3257
• Description: High Speed, 3.3 V/5 V Quad 2 1 Mux/demux 4-bit, 1 Of 2 Bus Switch
• Manufacturer: Analog Devices, Inc.

3.3V
2.5V
Memory Switching
This quad bus switch may be used to allow switching between
different memory banks, thus allowing additional memory and
decreasing capacitive loading. Figure 7 illustrates the ADG3257
in such an application.
REV. D
Figure 6. 3.3 V to 2.5 V Level Translation Using the
ADG3257 Bus Switch
ADG3257
3.3V
2.5V
2.5V
2.5V
V
0V
OUT
SWITCH INPUT
3.3V SUPPLY
3.3V
V
IN
–7–
Figure 7. Allows Additional Memory Modules without
Added Drive or Delay
SDRAM NO. 1
SDRAM NO. 2
SDRAM NO. 7
SDRAM NO. 8
BE
LOGIC
S
ADG3257