11.6

18

IDT49C460/A/B/C/D/E

32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT

MILITARY AND COMMERCIAL TEMPERATURE RANGES

NOTE: (15) above applies to correction path.

2584 tbl 71

IDT49C460E AC ELECTRICAL CHARACTERISTICS

(Guaranteed Commercial Range Performance) Temperature range: 0

The inputs switch between 0V to 3V with signal measured at the 1.5V level.

PROPAGATION DELAYS

(1)

SET-UP AND HOLD TIMES RELATIVE TO LATCH ENABLES

NOTES:

2584 tbl 73

1. CI = 50pF.

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.

OUTPUT ENABLE/DISABLE TIMES

(5)

MINIMUM PULSE WIDTHS

Min.

ud

5

ns

Enable

Disable

From Input

Enable

Disable

To Output

Min.

Max.

Min.

Max.

Unit

d

d

u

u

070

6

ns

d

d

u

u

070

6

ns

2584 tbl 70

2584 tbl 72

To Output

From Input

ERROR

ERROR

MULT ERROR

MULT ERROR

Unit

11

10

11

ns

9

12

7

9

ns

9

10

—

—

ns

GENERATE

u

u

—9

d

d

7

d

d

8ns

d

d

13

—

u

u

7

u

u

8ns

CORRECT

Not Internal Control Mode

—11

—

—

ns

DIAG MODE

Not Internal Control Mode

11

18

8

14

ns

17

12

15

ns

From latched to Transparent

16

19

13

16

ns

From latched to Transparent

u

u

17

11

13

ns

Internal

Control

latched to Transparent

u

u

16

11

13

ns

Mode

Via Diagnostic Latch

u

u

11

911

ns

From Input

To Input

(Latching Data)

Set-up Time

Min.

Hold Time

Min.

Unit

d

d

33

ns

d

d

23

ns

d

d

GENERATE

0ns

d

d

GENERATE

11

0

ns

d

d

GENERATE

60

ns

u

u

d

d

GENERATE

60

ns

d

d

GENERATE

13

0

ns

d

d

GENERATE

80

ns

u

u

d

d

GENERATE

14

0

ns

33

ns