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IDT49C460A Datasheet(PDF) 23 Page - Integrated Device Technology |
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IDT49C460A Datasheet(HTML) 23 Page - Integrated Device Technology |
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23 / 32 page  11.6 23 IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT MILITARY AND COMMERCIAL TEMPERATURE RANGES IDT49C460B 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 44 SET-UP AND HOLD TIMES RELATIVE TO LATCH ENABLES 2584 tbl 45 OUTPUT ENABLE/DISABLE TIMES (5) NOTES: 2584 tbl 47 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. Enable Disable From Input Enable Disable To Output Min. Max. Min. Max. Unit OE Byte0–3 d d u u DATA0–31 0 12 0 14 ns OESC d d u u SC0–7 0 12 0 14 ns MINIMUM PULSE WIDTHS Min. LEIN, LEOUT/ GENERATE, LEDIAG ud ud (Positive–going pulse) 9 ns 2584 tbl 46 To Output From Input SC0–7 DATA0–31 ERROR ERROR MULT ERROR MULT ERROR Unit DATA0–31(3) 25 30(2) 25 27 ns CB0–7 (CODE ID1,0 = 00, 11) 14 30 17 20 ns CB0–7 (CODE ID1,0 = 10) 16 18 — — ns LEOUT/ GENERATE u u —12 d d 23 d d 23 ns d d 21 — u u 23 u u 23 ns CORRECT Not Internal Control Mode —23 — — ns DIAG MODE Not Internal Control Mode 17 26 20 24 ns CODE ID1,0 18(6) 26 21 26 ns LEIN From latched to Transparent 27 38 (2) 30 3 ns LEDIAG From latched to Transparent u u 15(6) 29 19 22 ns Internal Control LEDIAG From latched to Transparent u u 16(6) 32 19 24 ns Mode DATA0–31 Via Diagnostic Latch u u 16 32 (2) 20 25 ns From Input To Input (Latching Data) Set-up Time Min. Hold Time Min. Unit DATA0–31(4) d d LEIN 44 ns CB0–7(4) d d LEIN 44 ns DATA0–31(4, 6) d d LEOUT/ GENERATE 19 0 ns CB0–7 (CODE ID 00, 11)(4, 6) d d LEOUT/ GENERATE 15 0 ns CB0–7 (CODE ID 10)(4, 6) d d LEOUT/ GENERATE 15 0 ns CORRECT(4, 6) u u d d LEOUT/ GENERATE 11 0 ns DIAG MODE(4, 6) d d LEOUT/ GENERATE 17 0 ns CODE ID1,0(4, 6) d d LEOUT/ GENERATE 17 0 ns LEIN(4, 6) u u d d LEOUT/ GENERATE 20 0 ns DATA0–31(4, 6) LEDIAG 43 ns |
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