IDT49C460 データシートの表示（PDF） - Integrated Device Technology
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IDT49C460 Datasheet PDF : 32 Pages
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IDT49C460/A/B/C/D/E
32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DETECT OR CORRECTION MODE (FROM GENERATE MODE)
Propagation Delay
From
To
Min./Max.
OE byte
DATA bus
(Output)
0
6
CBIN
CORRECT
CODE ID1,0 = 00, 11
CODE ID1,0 = 10
LEIN.
LEOUT/GEN
ERROR
MERROR
OESC
0
6
SCOUT
0
7
OE byte = High to DATAOUT Disabled
OE byte = High to DATAOUT Disabled
OE byte = Low to DATAOUT Enabled
OE byte = Low to DATAOUT Enabled
Valid DATAIN
14
OUT
(Corrected DATA if Correct Mode)
(DATAIN if Detect Mode)
DATAIN to DATAOUT
Valid Checkbits In
11
CORRECT = High to DATAOUT
12
10
19*
CBIN to DATAOUT
CBIN to DATAOUT
*LEIN = High to DATAOUT
Min.
Max.
Min.
Max.
Max.
Max.
Max.
Max.
Max.
9
8
7
10
7
13*
11
9
16*
11
9
0
7
Valid
LEOUT/GEN = High to DATAOUT
LEOUT/GEN = High to MERROR = Low
LEOUT/GEN = High to ERROR = Low
DATAIN to ERROR = Low
CBIN to ERROR = Low
*LEIN = High to ERROR = Low*
(Low = Error)
DATAIN to MERROR = Low
CBIN to MERROR = Low
*LEIN = High to MERROR = Low*
(Low = Error)
DATAIN to SCOUT
CBIN to SCOUT
Max.
Max.
Max.
Max.
Max.
Max.
Max.
Max.
Max.
Max.
Max.
OESC = High to SCOUT Disabled
OESC = High to SCOUT Disabled
OESC = Low to SCOUT Enabled
OESC = Low to SCOUT Enabled
(Syndrome Bits Come Out)
Min.
Max.
Min.
Max.
NOTES:
1. BOLD indicates critical parameters.
2. This is "E" version timing spec. Check appropriate table for other speed versions.
* Assumes "CBIN" and/or "DATAIN" are valid at least 4ns before "LEIN" goes high.
2584 drw 10
11.6
29
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