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PC8477B 데이터시트(PDF) 49 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 PC8477B
상세설명  Advanced Floppy Disk Controller
PDF  54 Pages
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC8477B 데이터시트(HTML) 49 Page - National Semiconductor (TI)

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70 Reference Section (Continued)
TABLE 7-1 8477B – 82077AA Parameter Comparison
(Continued)
Description
PC8477B
82077AA
82077SL
Units
AC Timings
(Continued)
t35 (tDST)–DIR Setup to STEP Active MIN
6
4
4
m
s
t36 (tSTD)–DIR Hold from STEP Inactive MIN
tSRT
10
10
m
s
t37 (tSTP)–STEP Active Pulse Width
8
25
25
m
s
t39 (tIW)–Index Pulse Widh MIN
1 Mbs
100
625
625
ns
500 kbs
100
1250
1250
ns
300 kbs
100
2100
2100
ns
250 kbs
100
2500
2500
ns
t41 (tHDH)–HDSEL Hold from WGATE Inactive MIN
1 Mbs
750
716
716
m
s
500 kbs
750
1432
1432
m
s
300 kbs
750
2719
2719
m
s
250 kbs
750
2864
2864
m
s
tHDS–HDSEL Setup to WGATE Active
100
no spec
no spec
m
s
These timings are required to support perpendicular recording drives
49



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