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IDT49C460AFFB Datasheet(PDF) 21 Page - Integrated Device Technology |
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IDT49C460AFFB Datasheet(HTML) 21 Page - Integrated Device Technology |
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21 / 32 page  11.6 21 IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT MILITARY AND COMMERCIAL TEMPERATURE RANGES IDT49C460C AC ELECTRICAL CHARACTERISTICS (Guaranteed Commercial Range Performance) Temperature range: 0 °C to +70°C, VCC = 5.0V ± 5% The inputs switch between 0V to 3V with signal measured at the 1.5V level. PROPAGATION DELAYS (1) 2584 tbl 36 SET-UP AND HOLD TIMES RELATIVE TO LATCH ENABLES OUTPUT ENABLE/DISABLE TIMES (5) NOTES: 2584 tbl 39 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. NOTE: (16) above applies to correction path. 2584 tbl 37 Enable Disable From Input Enable Disable To Output Min. Max. Min. Max. Unit OE Byte0–3 d d u u DATA0–31 0 10 0 12 ns OESC d d u u SC0–7 0 10 0 12 ns MINIMUM PULSE WIDTHS Min. LEIN, LEOUT/ GENERATE, LEDIAG ud ud (Positive–going pulse) 6 ns 2584 tbl 38 (6) To Output From Input SC0–7 DATA0–31 ERROR ERROR MULT ERROR MULT ERROR Unit DATA0–31(3) 19 24(2) 16 20 ns CB0–7 (CODE ID1,0 = 00, 11) 14 21 12 16 ns CB0–7 (CODE ID1,0 = 10) 14 16 — — ns LEOUT/ GENERATE u u —12 d d 9 d d 11 ns d d 18 — u u 9 u u 11 ns CORRECT Not Internal Control Mode —16 — — ns DIAG MODE Not Internal Control Mode 16 26 11 20 ns CODE ID1,0 18(6) 23 17 21 ns LEIN From latched to Transparent 22 28(2) 19 22 ns LEDIAG From latched to Transparent u u 15(6) 24 15 19 ns Internal Control LEDIAG From latched to Transparent u u 16(6) 22 15 18 ns Mode DATA0–31 Via Diagnostic Latch u u 15 25(2) 13 16 ns From Input To Input (Latching Data) Set-up Time Min. Hold Time Min. Unit DATA0–31(4) d d LEIN 34 ns CB0–7(4) d d LEIN 24 ns DATA0–31(4, 6) d d LEOUT/ GENERATE 6(16) 0ns CB0–7 (CODE ID 00, 11)(4, 6) d d LEOUT/ GENERATE 14 0 ns CB0–7 (CODE ID 10)(4, 6) d d LEOUT/ GENERATE 80 ns CORRECT(4, 6) u u d d LEOUT/ GENERATE 80 ns DIAG MODE(4, 6) d d LEOUT/ GENERATE 17 0 ns CODE ID1,0(4, 6) d d LEOUT/ GENERATE 10 0 ns LEIN(4, 6) u u d d LEOUT/ GENERATE 19 0 ns DATA0–31(4, 6) LEDIAG 33 ns |
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