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MCM44256B Datasheet(PDF) 6 Page - Motorola, Inc

Part No. MCM44256B
Description  4MB R4000 Secondary Cache Fast Static RAM Module Set
Download  8 Pages
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MCM44256B Datasheet(HTML) 6 Page - Motorola, Inc

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MCM44256B SERIES
6
MOTOROLA FAST SRAM
WRITE CYCLE 1 (WE Controlled, See Notes 1 and 2)
P
Sb l
–12
–15
–17
Ui
N
Parameter
Symbol
Min
Max
Min
Max
Min
Max
Unit
Notes
Address Setup Time
tAVWL
5
5
5
ns
A0 Setup Time
tA0VWL
0
0
0
ns
Address Valid to End of Write
tAVWH
12
15
17
ns
A0 Valid to End of Write
tA0VWH
10
12
14
ns
Write Pulse Width
tWLWH,
tWLEH
7
10
12
ns
Data Valid to End of Write
tDVWH
6
7
8
ns
Data Hold Time
tWHDX
0
0
0
ns
Write Low to Data High–Z
tWLQZ
0
4
0
5
0
6
ns
3, 4
Write High to Output Active
tWHQX
3
3
3
ns
3, 4
Write Recovery Time
tWHAX
0
0
0
ns
Write Recovery Time — A0
tWHA0X
0
0
0
ns
NOTES:
1. A write occurs during the overlap of DCS or TCS low and WE low.
2. Enable timings are the same for both DCS and TCS.
3. Transition is measured 200 mV from steady–state voltage.
4. This parameter is sampled and not 100% tested.
tA0VWL
DATA VALID
tAVWH
tWHDX
tWLQZ
tWHQX
HIGH–Z
A1 – A17
WE (WRITE ENABLE)
DCS/TCS
(DATA/TAG ENABLE)
Q (DATA OUT)
D (DATA IN)
tWLEH
tWHAX
tAVWL
A0
tWLWH
tDVWH
tWHA0X
tA0VWH
HIGH–Z
WRITE CYCLE 1


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