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IDT49C460A Datasheet(PDF) 28 Page - Integrated Device Technology |
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IDT49C460A Datasheet(HTML) 28 Page - Integrated Device Technology |
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28 / 32 page  11.6 28 IDT49C460/A/B/C/D/E 32-BIT CMOS ERROR DETECTION AND CORRECTION UNIT MILITARY AND COMMERCIAL TEMPERATURE RANGES IDT49C460 AC ELECTRICAL CHARACTERISTICS (Guaranteed Military Range Performance) Temperature range: –55 °C to +125°C, VCC = 5.0V ± 10% The inputs switch between 0V to 3V with signal measured at the 1.5V level. PROPAGATION DELAYS (1) OUTPUT ENABLE/DISABLE TIMES (5) Enable Disable From Input Enable Disable To Output Min. Max. Min. Max. Unit OE Byte0–3 d d u u DATA0–31 0 15 0 17 ns OESC d d SC0–7 0 15 0 17 ns 2584 tbl 64 SET-UP AND HOLD TIMES RELATIVE TO LATCH ENABLES 2584 tbl 65 MINIMUM PULSE WIDTHS Min. LEIN, LEOUT/ GENERATE, LEDIAG (Positive–going pulse) 15 ns NOTES: 2584 tbl 67 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. To Output From Input SC0–7 DATA0–31 ERROR ERROR MULT ERROR MULT ERROR Unit DATA0–31(3) 40 52(2) 44 48 ns CB0–7 (CODE ID1,0 = 00, 11) 25 49 29 34 ns CB0–7 (CODE ID1,0 = 10) 25 33 — — ns LEOUT/ GENERATE u u —20 d d 33 d d 33 ns d d 32 — u u 33 u u 33 ns CORRECT Not Internal Control Mode —34 — — ns DIAG MODE Not Internal Control Mode 26 38 30 36 ns CODE ID1,0 28 38 32 38 ns LEIN From latched to Transparent 40 54 44 48 ns LEDIAG From latched to Transparent u u 24 42 29 33 ns Internal Control LEDIAG From latched to Transparent u u 25 47(2) 29 36 ns Mode DATA0–31 Via Diagnostic Latch u u 25 47 30 37 ns From Input To Input (Latching Data) Set-up Time Min. Hold Time Min. Unit DATA0–31(4) d d LEIN 64 ns CB0–7(4) d d LEIN 54 ns DATA0–31(4, 6) d d LEOUT/ GENERATE 36 0 ns CB0–7 (CODE ID 00, 11)(4, 6) d d LEOUT/ GENERATE 24 0 ns CB0–7 (CODE ID 10)(4, 6) d d LEOUT/ GENERATE 24 0 ns CORRECT(4, 6) u u d d LEOUT/ GENERATE 20 0 ns DIAG MODE(4, 6) d d LEOUT/ GENERATE 28 0 ns CODE ID1,0(4, 6) d d LEOUT/ GENERATE 28 0 ns LEIN(4, 6) u u d d LEOUT/ GENERATE 37 0 ns DATA0–31(4, 6) LEDIAG 63 ns 2584 tbl 66 |
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