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PC8477B 数据表(PDF) 39 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 PC8477B
功能描述  Advanced Floppy Disk Controller
PDF  54 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

PC8477B 数据表(HTML) 39 Page - National Semiconductor (TI)

Back Button PC8477B Datasheet HTML 35Page - National Semiconductor (TI) PC8477B Datasheet HTML 36Page - National Semiconductor (TI) PC8477B Datasheet HTML 37Page - National Semiconductor (TI) PC8477B Datasheet HTML 38Page - National Semiconductor (TI) PC8477B Datasheet HTML 39Page - National Semiconductor (TI) PC8477B Datasheet HTML 40Page - National Semiconductor (TI) PC8477B Datasheet HTML 41Page - National Semiconductor (TI) PC8477B Datasheet HTML 42Page - National Semiconductor (TI) PC8477B Datasheet HTML 43Page - National Semiconductor (TI) Next Button
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60 Device Description (Continued)
DC Characteristics
Under Recommended Operating Conditions (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
MICROPROCESSOR INTERFACE PINS
(D7 – D0 A2 – A0 CS RD WR INT DRQ DACK TC RESET)
VOH
Output High Voltage
IOH eb4 mA
30
V
VOL
Output Low Voltage
IOL e 12 mA
04
V
IOZ
Input TRI-STATE
VIN e VCC
10
m
A
Leakage Current
VIN e 0
b
10
m
A
(D7 – D0 INT DRQ)
DISK INTERFACE PINS
VH
Input Hysteresis
250
mV
VOH
Output High Voltage (Note 5)
IOH eb4 mA
30
V
VOL
Output Low Voltage
IOL e 48 mA
04
V
ILKG
Output High Leakage Current
VIN e VCC
10
m
A
(Note 6)
VIN e 0V
b
10
m
A
MISCELLANEOUS PINS
VOH
Output High Voltage
IOH eb4mA
30
V
(DRATE0 – 1 MFM)
VOL
Output Low Voltage
IOL e 6mA
04
V
(DRATE0 – 1)
VOL
Output Low Voltage (MFM)
IOL e 4 mA
04
V
Note 5
VOH for the disk interface pins is valid for CMOS buffered outputs only
Note 6
This parameter is valid for Open Drain output configuration only
62 PHASE LOCKED LOOP CHARACTERISTICS
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Dynamic Window Margin
TDW
(Note)
68
73
%
Note
Dynamic window margin is tested at both VCC extremes with a repeating ‘‘DB6’’ pattern and 0% MSV 500 kbs 300 kbs 250 kbs and 1 Mbs are tested
at 68%
39



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