idt49c465apqfb Integrated Device Technology, idt49c465apqfb Datasheet - Page 29

• Manufacturer Part Number: idt49c465apqfb
• Description: 32-bit Flow-thru Error Detection Correction Unit
• Manufacturer: Integrated Device Technology

IDT49C465/A
32-BIT FLOW-THRU ERROR DETECTION AND CORRECTION UNIT
AC TIMING DIAGRAMS — 32-BIT CONFIGURATION
NOTE:
1. Assumes that Memory Data and Checkbits are valid at least 3ns (Com.)/4ns (Mil,) before MLE goes HIGH.
MD
MERR
MOE
MLE
ERR
SYO
0–31
CBI
(OUTPUT)
to
to
t MEMxZ
1
1
t MLSY
t MMLS
Valid Checkbits In
t CMLS
Valid DATA
t MLEx
t MSY
t CSY
(1)
t MLMEx
t CMLH
t MMLH
2
2
t ME
t CE
(1)
IN
t MME
t CME
(1)
3
3
Figure 8. 32-Bit Detect Timing
4
4
11.7
5
5
Parameter
t MLEMx
t ME
t CE
t MLEx
t MME
t CME
t MEMxZ
t MMLS
t MMLH
t CMLS
t CMLH
t MSY
t CSY
t MLSY
Name
MILITARY AND COMMERCIAL TEMPERATURE RANGES
(1)
(1)
(1)
MOE = High to MD
MD
MD
Checkbit Set-up to MLE = Low
Checkbit Hold to MLE = Low
MD
Checkbits in to SYO
MLE = High to SYO
MD
Checkbits in to ERR = Low
MLE = High to ERR = Low
MD
Checkbits in to MERR = Low
MLE = High to MERR = Low
From
IN
IN
IN
IN
IN
Set-up to MLE = Low
Hold to MLE = Low
to SYO
to
to
Propagation Delay
ERR
MERR
OUT
= Low
= Low
OUT
OUT
OUT
Disabled
(1)
To
(1)
2552 drw 20
max.
max.
Min./
Max.
max.
min.
min.
min.
min.
max.
max.
max.
max.
max.
max.
max.
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