전자부품 데이터시트 검색엔진 |
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SN74ALVC7813 데이터시트(PDF) 10 Page - Texas Instruments |
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SN74ALVC7813 데이터시트(HTML) 10 Page - Texas Instruments |
10 / 14 page SN74ALVC7813 64 × 18 LOW-POWER CLOCKED FIRST-IN, FIRST-OUT MEMORY SCAS594A – OCTOBER 1997 – REVISED APRIL 1998 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating conditions (see Figures 1 through 5) ’ALVC7813-20 ’ALVC7813-25 ’ALVC7813-40 UNIT MIN MAX MIN MAX MIN MAX UNIT fclock Clock frequency 50 40 25 MHz D0–D17 high or low 9 10 14 WRTCLK high or low 7 8 12 RDCLK high or low 7 8 12 tw Pulse duration PEN low 9 9 12 ns WRTEN1 high, WRTEN2 low 8 8 12 OE1, OE2 low 9 9 12 RDEN low 8 8 12 D0–D17 before WRTCLK ↑ 5 5 5 WRTEN1, WRTEN2 before WRTCLK ↑ 5 5 5 OE1, OE2 before RDCLK ↑ 5 6 6 tsu Setup time RDEN before RDCLK ↑ 5 5 7 ns Reset: RESET low before first WRTCLK ↑ and RDCLK ↑† 6 6 6 PEN before WRTCLK ↑ 6 6 6 D0–D17 after WRTCLK ↑ 0 0 0 WRTEN1, WRTEN2 after WRTCLK ↑ 0 0 0 th Hold time OE1, OE2, RDEN after RDCLK ↑ 0 0 0 ns th Hold time Reset: RESET low after fourth WRTCLK ↑ and RDCLK ↑† 2 2 2 ns PEN low after WRTCLK ↑ 2 2 2 † To permit the clock pulse to be utilized for reset purposes switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Figure 5) PARAMETER FROM TO ’ALVC7813-20 ’ALVC7813-25 ’ALVC7813-40 UNIT PARAMETER (OUTPUT) (INPUT) MIN MAX MIN MAX MIN MAX UNIT fmax WRTCLK or RDCLK 50 40 25 MHz RDCLK ↑ Any Q 4 13 4 15 4 20 WRTCLK ↑ IR 3 11 3 13 3 15 tpd RDCLK ↑ OR 3 11 3 13 3 15 ns WRTCLK ↑ AF/AE 7 19 7 21 7 23 RDCLK ↑ AF/AE 7 19 7 21 7 23 tPLH WRTCLK ↑ HF 7 17 7 19 7 21 ns tPHL RDCLK ↑ HF 7 18 7 20 7 22 ns tPLH RESET low AF/AE 2 11 2 13 2 15 ns tPHL RESET low HF 2 12 2 14 2 16 ns ten OE1, OE2 Any Q 2 11 2 11 2 14 ns tdis OE1, OE2 Any Q 2 11 2 14 2 14 ns operating characteristics, VCC = 3.3 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance Outputs enabled CL = 50 pF, f = 5 MHz 53 pF |
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