pc8477b National Semiconductor Corporation, pc8477b Datasheet - Page 39

• Manufacturer Part Number: pc8477b
• Description: Advanced Floppy Disk Controller
• Manufacturer: National Semiconductor Corporation

MICROPROCESSOR INTERFACE PINS (D7 – D0 A2 – A0 CS RD WR INT DRQ DACK TC RESET)
DISK INTERFACE PINS
MISCELLANEOUS PINS
6 0 Device Description
DC Characteristics Under Recommended Operating Conditions (Continued)
Note 5 V
Note 6 This parameter is valid for Open Drain output configuration only
6 2 PHASE LOCKED LOOP CHARACTERISTICS
Note Dynamic window margin is tested at both V
at 68%
Symbol
V
V
I
V
V
V
I
V
V
V
Dynamic Window Margin
OZ
LKG
OH
OL
H
OH
OL
OH
OL
OL
OH
Parameter
for the disk interface pins is valid for CMOS buffered outputs only
Output High Voltage
Output Low Voltage
Input TRI-STATE
Leakage Current
(D7 – D0 INT DRQ)
Input Hysteresis
Output High Voltage (Note 5)
Output Low Voltage
Output High Leakage Current
(Note 6)
Output High Voltage
(DRATE0 – 1 MFM)
Output Low Voltage
(DRATE0 – 1)
Output Low Voltage (MFM)
Parameter
Symbol
(Continued)
T
CC
DW
extremes with a repeating ‘‘DB6’’ pattern and 0% MSV 500 kb s 300 kb s 250 kb s and 1 Mb s are tested
Conditions
I
I
V
V
I
I
V
V
I
I
I
OH
OL
OH
OL
OH
OL
OL
(Note)
Conditions
IN
IN
IN
IN
e
e
e
e
e b
e
e
e b
e
e
e b
39
12 mA
48 mA
6 mA
4 mA
V
0
V
0V
CC
CC
4 mA
4 mA
4 mA
Min
68
Min
3 0
3 0
3 0
Typ
73
Typ
250
Max
Max
b
b
0 4
0 4
0 4
0 4
10
10
10
10
Units
Units
mV
%
mA
mA
mA
mA
V
V
V
V
V
V
V