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PC87311A Datasheet(PDF) 64 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza PC87311A
Descripción Electrónicos  PC87311A/PC87312 (SuperI/OTM II/III) Floppy Disk Controller with Dual UARTs, Parallel Port, and IDE Interface
PDF  78 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC87311A Datasheet(HTML) 64 Page - National Semiconductor (TI)

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90 Device Description (Continued)
92 AC ELECTRICAL CHARACTERISTICS
921 AC Test Conditions
TA e 0 Cto70 C
VDD e 50V e g10%
LOAD CIRCUIT
(Notes 1 2 3)
TLF11362 – 15
Note 1
CL e 100 pF includes jig and scope capacitance
Note 2
S1 e Open for push-pull outputs S1 e VDD for high impedance to
active low and active low to high impedance measurements S1 e GND for
high impedance to active high and active high to high impedance measure-
ments RL e 10 kX for mP interface pins
Note 3
For the FDC Open Drive Interface Pins S1 e VDD and RL e 150X
AC TESTING INPUT OUTPUT WAVEFORM
TLF11362 – 16
922 Clock Timing
Symbol
Parameter
Min
Max
Units
tCH
Clock High Pulse Width
16
ns
tCL
Clock Low Pulse Width
16
ns
tCP
Clock Period
40
43
ns
tICP
Internal Clock Period (Table 9-1)
tDRP
Data Rate Period (Table 9-1)
TABLE 9-1 Nominal tICP tDRP Values
MFM Data Rate
tDRP
tICP
Value
Units
1 Mbs
1000
3 c tCP
125
ns
500 kbs
2000
3 c tCP
125
ns
300 kbs
3333
5 c tCP
208
ns
250 kbs
4000
6 c tCP
250
ns
TLF11362 – 17
FIGURE 9-1 Clock Timing
64



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