LC895127 Datasheet, PDF (3/8 Pages) Sanyo Semicon Device – 40 x CD-ROM Decoder with SCSI Interface

LC895127, 895127K
SCSI Pin Input Characteristics
Parameter
Symbol
Conditions
Input threshold voltage
Hysteresis width
V_t+t1
V_t–t1
∆V_tt1
V_DD = 4.50 to 5.50 V
V_DD = 5.0 V
Active-Low Output Characteristics
Parameter
Symbol
Output high-level voltage
V_OH
Output low-level voltage
V_OL
Note: Only applies to the active-low output pins DB0 to DB7, REQ, DBPB
Conditions
min
0.80
0.41
Ratings
typ
1.60
1.10
0.5
Unit
max
2.00
V
V
V
min
2.5
Ratings
typ
Unit
max
V
0.4
V
Rise time test circuit
SCSI
driver
TP
47 Ω ± 5 %
15 pF ± 5 %
+
–
2.5 V
Recommended Oscillator and PLL Circuits
LC895127
XTALCK0
XTAL0
PN27
R1
PN28
R2
C1
C2
A12526
LC895127
PLL
PN69
PN70
R4
R3
C5
C3
C4
PN71
R5
A12527
A12528
R1 = 120 kΩ, R2 = 47 Ω, C1 = 30 pF
Crystal oscillator frequency XTALCK0 = 16.9344 MHz
R3 = 7.5 kΩ, R4 = 200 Ω, R5 = 10 kΩ, C3 = 0.1 µF
C4 = 0.1 µF, C5 = 0.002 µF to 0.01 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 V_DD and V_SS power supply system is completely independent of the
logic system power supply and is not affected by the logic system power supply fluctuation in any way.
Note: Since the exact values of these components will vary depending on the 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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