поискавой системы для электроныых деталей |
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74HCT670 датащи(PDF) 8 Page - NXP Semiconductors |
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74HCT670 датащи(HTML) 8 Page - NXP Semiconductors |
8 / 9 page December 1990 8 Philips Semiconductors Product specification 4 x 4 register file; 3-state 74HC/HCT670 AC WAVEFORMS Fig.6 Waveforms showing the read address input (RA, RB) to output (Qn) propagation delays and output transition times. (1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V. Fig.7 Waveforms showing the write enable input (WE) and data input (Dn) to output (Qn) propagation delays, and the write enable pulse width. (1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V. Fig.8 Waveforms showing the write address input (WA, WB) and data input (Dn) to write enable (WE) set-up, hold and latch times. (1) HC : VM = 50%; VI = GND to VCC. HCT : VM = 1.3 V; VI = GND to 3 V. The shaded areas indicate when the input is permitted to change for predictable output performance. The time allowed for the internal output of the latch to assume the state of the new data (tlatch) is important only when attempting to read from a location immediately after that location has received new data. This parameter is measured from the falling edge of WE to the rising edge of RA or RB, RE must be LOW. |
Аналогичный номер детали - 74HCT670 |
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Аналогичное описание - 74HCT670 |
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