PC8477BV-1 National Semiconductor, PC8477BV-1 Datasheet - Page 49

• Manufacturer Part Number: PC8477BV-1
• Description: IC ADVANCED FLOPPY CTRLR 68PLCC
• Manufacturer: National Semiconductor
• Series: SuperFDC™r

Specifications of PC8477BV-1

• Controller Type: Floppy Disk Controller
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 68-LCC (J-Lead)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Interface: -
• Other names: *PC8477BV-1

7 0 Reference Section
These timings are required to support perpendicular recording drives
AC Timings (Continued)
t
t
t
t
t
t
35
36
37
39
41
HDS
1 Mb s
500 kb s
300 kb s
250 kb s
1 Mb s
500 kb s
300 kb s
250 kb s
(t
(t
(t
(t
(t
DST
STD
STP
IW
HDH
–HDSEL Setup to WGATE Active
)–Index Pulse Widh MIN
) –STEP Active Pulse Width
)–DIR Setup to STEP Active MIN
)–DIR Hold from STEP Inactive MIN
) –HDSEL Hold from WGATE Inactive MIN
Description
TABLE 7-1 8477B–82077AA Parameter Comparison (Continued)
(Continued)
PC8477B
49
t
100
100
100
100
SRT
750
750
750
750
100
6
8
82077AA
no spec
1250
2100
2500
1432
2719
2864
625
716
2 5
10
4
82077SL
no spec
1250
2100
2500
1432
2719
2864
625
716
2 5
10
4
Units
ns
ns
ns
ns
s
s
s
s
s
s
s
s