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LC897127K Datasheet(PDF) 3 Page - Sanyo Semicon Device |
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LC897127K Datasheet(HTML) 3 Page - Sanyo Semicon Device |
3 / 14 page No. 6251-3/14 LC897127K SCSI Pin Input Characteristics Parameter Symbol Conditions Ratings Unit min typ max Input threshold voltage Vt+t1 VDD = 4.50 to 5.50 V 1.60 2.00 V Vt–t1 0.80 1.10 V Hysteresis width ∆Vtt1 VDD = 5.0 V 0.41 0.5 V Active Low Output Characteristics Parameter Symbol Conditions Ratings Unit min typ max Output high-level voltage VOH 2.5 V Output low-level voltage VOL 0.4 V Note: Only applies to the active-low output pins DB0 to DB7, REQ, and DBPB Rise Time Test Circuit SCSI Driver TP 47 Ω±5% 15pF ±5% 2.5V + – A12548 Recommended Oscillator and PLL Circuits LC897127 R1 R2 C2 C1 XTALCK0 PN27 XTAL0 PN28 PN69 PN70 PN71 A12549 LC897127 PLL R5 R4 C3 R3 A12550 R1 = 120 k Ω, R2 = 47 Ω, C1 = 30 pF Crystal element oscillator frequency XTALCK0 = 16.9344 MHz R3 = 7.5 k Ω, R4 = 200 Ω, R5 = 10k Ω, C3 = 0.1 µF Note: The values listed above for R3, R4, R5, and C3 also apply when the XTALKC0 frequency is 33.8688 MHz. Applications must be designed so that the analog VDD and VSS power supply system is completely independent of the logic system power supply and is not affected by the logic system power supply in any way. Since the exact values of these components will vary depending on characteristics of the printed circuit board used and other factors, consult the manufacturer of the crystal element when designing the oscillator circuit. |
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