WE512K16-150G4C データシートの表示（PDF） - White Electronic Designs => Micro Semi
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WE512K16-150G4C Datasheet PDF : 10 Pages
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White Electronic Designs
WE512K16-XG4X
READ
The module stores data at the memory location determined
by the address pins. When CS# and OE# are low and WE#
is high, this data is present on the outputs. When CS# and
OE# are high, the outputs are in a high impedance state.
This two line control prevents bus contention.
AC READ CHARACTERISTICS
VCC = 5.0V, VSS = 0V, -55°C ≤ TA ≤ +125°C
Parameter
Read Cycle Time
Address Access Time
Chip Select Access Time
Output Hold from Address Change, OE# or CS#
Output Enable to Output Valid
Chip Select or OE# to High Z Output
-140
-150
-200
Symbol
Unit
Min
Max
Min
Max
Min
Max
trc
140
150
200
ns
tacc
140
150
200
ns
tacs
140
150
200
ns
toh
0
0
0
ns
toe
0
50
0
55
0
55
ns
tdf
50
70
70
ns
FIGURE 5 – READ WAVEFORMS
ADDRESS
CS#
OE#
OUTPUT
Notes:
OE# may be delayed up to tACS - tOE after the falling edge of CS# without impact
on tOE or by tACC - toe after an address change without impact on tACC.
CS1-4# are used as bank selects.
During reads, only one CSx# can be active at one time.
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
April 1999
Rev. 2
5
White Electronic Designs Corporation • (602) 437-1520 • www.wedc.com
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