전자부품 데이터시트 검색엔진 |
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54ACTQ657F 데이터시트(PDF) 8 Page - National Semiconductor (TI) |
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54ACTQ657F 데이터시트(HTML) 8 Page - National Semiconductor (TI) |
8 / 10 page AC Electrical Characteristics Symbol Parameter V CC (V) (Note 6) 54ACTQ Units T A = −55˚C to +125˚C C L = 50 pF Min Max t PLH, Propagation Delay 5.0 1.5 9.0 ns t PHL A n to Bn,Bn to An t PLH, Propagation Delay 5.0 1.5 13.5 ns t PHL A n to Parity t PLH, Propagation Delay 5.0 1.5 10.5 ns t PHL ODD/EVEN to PARITY t PLH, Propagation Delay 5.0 1.5 11.0 ns t PHL ODD/EVEN to ERROR t PLH, Propagation Delay 5.0 1.5 13.5 ns t PHL B n to ERROR t PLH, Propagation Delay 5.0 1.5 10.5 ns t PHL PARITY to ERROR t PZH, Output Enable Time 5.0 1.5 11.5 ns t PZL OE to A n/Bn t PHZ, Output Disable Time 5.0 1.5 9.0 ns t PLZ OE to A n/Bn t PZH, Output Enable Time 5.0 1.5 11.5 ns t PZL OE to ERROR (Note 7) t PHZ, Output Disable Time 5.0 1.5 9.0 ns t PLZ OE to ERROR t PZH, Output Enable Time 5.0 1.5 11.5 ns t PZL OE to PARITY t PHZ, Output Disable Time 5.0 1.5 8.5 ns t PLZ OE to PARITY Note 6: Voltage Range 5.0 is 5.0V ±0.5V Note 7: These delay times reflect the TRI-STATE recovery time only and not the signal time through the buffers or the parity check circuitry. To assure VALID infor- mation at the ERROR pin, time must be allowed for the signal to propagate through the drivers (B to A), through the parity check circuitry (same as A to PARITY), and to the ERROR output after the ERROR pin has been enabled (Output Enable times). VALID data at the ERROR pin ≥ (A to PARITY) + (Output Enable Time). Capacitance Symbol Parameter Typ Units Conditions C IN Input Capacitance 4.5 pF V CC = 5.0V C PD Power Dissipation 160.0 pF V CC = 5.0V Capacitance www.national.com 8 |
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