idt49c460cjb Integrated Device Technology, idt49c460cjb Datasheet - Page 28

• Manufacturer Part Number: idt49c460cjb
• Description: 32-bit Cmos Error Detection And Correction Unit
• Manufacturer: Integrated Device Technology

IDT49C460/A/B/C/D/E
32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT
IDT49C460 AC ELECTRICAL CHARACTERISTICS
(Guaranteed Military Range Performance) Temperature range: –55 C to +125 C, V
The inputs switch between 0V to 3V with signal measured at the 1.5V level.
PROPAGATION DELAYS
SET-UP AND HOLD TIMES RELATIVE TO LATCH ENABLES
OUTPUT ENABLE/DISABLE TIMES
NOTES:
1. CI = 5pF.
2. These parameters are combinational propagation delay calculations, and are not tested in production.
3. Data In or Correct Data Out measurement requires timing as shown in the Switching Waveforms.
4. Set-up and Hold times relative to Latch Enables (Latching Data).
5. Output tests specified with CI = 5pF and measured to 0.5V change of output level. Testing is performed at CI = 50pF and correlated to CI = 5pF.
6. Not production tested, guaranteed by characterization.
MINIMUM PULSE WIDTHS
Internal
Control
Mode
DATA
CB
DATA
CB
CB
CORRECT
DIAG MODE
CODE ID
LE
DATA
OE Byte
OE
LE
IN (4, 6)
0–7 (4)
0–7
0–7
IN
SC
0–31 (4)
0–31 (4, 6)
0–31 (4, 6)
, LE
(CODE ID 00, 11)
(CODE ID 10)
DATA
CB
CB
LE
CORRECT
Not Internal Control Mode
DIAG MODE
Not Internal Control Mode
CODE ID
LE
From latched to Transparent
LE
From latched to Transparent
LE
From latched to Transparent
DATA
Via Diagnostic Latch
1,0 (4, 6)
0–3
OUT
(4, 6)
OUT
IN
DIAG
DIAG
From Input
0–7
0–7
(4, 6)
/
GENERATE
0–31 (3)
0–31
/
GENERATE
(CODE ID
(CODE ID
1,0
(4, 6)
From Input
From Input
(4, 6)
, LE
1,0
1,0
= 00, 11)
= 10)
DIAG
(1)
Enable
(Positive–going pulse)
d d
d d
(5)
u u
d d
u u
u u
u u
u u d d
u u d d
Disable
u u
d d
d d
d d
d d
d d
d d
d d
SC
40
25
25
32
26
28
40
24
25
25
—
—
0–7
11.6
(Latching Data)
LE
LE
LE
LE
LE
LE
LE
To Input
OUT
OUT
OUT
OUT
OUT
OUT
OUT
To Output
DATA
LE
SC
/
/
/
/
/
/
/
LE
LE
GENERATE
GENERATE
GENERATE
GENERATE
GENERATE
GENERATE
GENERATE
DIAG
DATA
0–7
IN
IN
0–31
52
47
49
33
20
38
38
54
42
47
34
—
(2)
(2)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
0–31
To Output
Min.
Set-up Time
d d
u u
0
0
CC
ERROR
Enable
ERROR
Min.
44
29
30
32
44
29
29
30
36
24
24
20
28
28
37
—
—
6
5
6
= 5.0V
Max.
33
33
15
15
10%
MULT ERROR
MULT ERROR
Min.
Min.
15
d d
u u
0
0
Hold Time
Disable
Min.
48
34
36
38
48
33
36
37
—
—
4
4
0
0
0
0
0
0
0
3
Max.
33
33
17
17
2584 tbl 66
2584 tbl 64
2584 tbl 65
2584 tbl 67
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
ns
ns
ns
28
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns