MSM82C55A-2VJS View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
MFG CO.
'MSM82C55A-2VJS' PDF : 26 Pages View PDF
¡ Semiconductor
MSM82C55A-2RS/GS/VJS
Differences between MSM82C55A-5 and MSM82C55A-2
1) Manufacturing Process
These devices use a 3 m Si-Gate CMOS process technology.
The MSM82C55A-2 is about 7% smaller in chip size than the MSM82C55A-5 as the MSM82C55A-
2 changed its output characteristics.
2) Function
Item
Internal latch during writing into
the command register
MSM82C55A-5
Only ports A and C are cleared.
Port B is not cleared.
MSM82C55A-2
All ports are cleared.
The above function has been improved to remove bugs and other logics are not different between
the two devices.
3) Electrical Characteristics
3-1) DC Characteristics
Parameter
''L'' Output Voltage
''H'' Output Voltage
Average Operating Current
Symbol
VOL
VOH
ICC
MSM82C55A-5
0.45 V
(IOL = +2.5 mA)
2.4 V
(IOH = -400 mA)
5 mA maximum
(I/O Cycle = 1 ms)
MSM82C55A-2
0.40 V
(IOL = +2.5 mA)
3.7 V
(IOH = -2.5 mA)
8 mA maximum
(I/O Cycle = 375 ns)
As shown above, the DC characteristics of the MSM82C55A-2 satisfies the DC characteristics of the
MSM82C55A-5.
3-2) AC Characteristics
Parameter
Address Hold Time for RD Rising
Symbol
tRA
RD Pulse Width
tRR
Difined Data Output Delay Time
From RD Falling
tRD
Data Floating Delay Time From RD Rising tRF
RD/WR Recovery Time
tRV
MSM82C55A-5
20 ns minimum
300 ns minimum
200 ns maximum
100 ns maximum
850 ns minimum
MSM82C55A-2
0 ns minimum
100 ns minimum
120 ns maximum
75 ns maximum
200 ns minimum
22/26
Share Link: 
