CS82C55A-5 Intersil, CS82C55A-5 Datasheet - Page 21

• Manufacturer Part Number: CS82C55A-5
• Description: IC I/O EXPANDER 24B 44PLCC
• Manufacturer: Intersil

Specifications of CS82C55A-5

• Interface: Programmable
• Number Of I /o: 24
• Interrupt Output: No
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-PLCC
• Chip Configuration: 8 Bit
• Bus Frequency: 5MHz
• No. Of I/o's: 24
• Supply Voltage Range: 4.5V To 5.5V
• Digital Ic Case Style: LCC
• No. Of Pins: 44
• Leaded Process Compatible: No
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Frequency - Clock: -

Timing Waveforms
NOTE: Any sequence where WR occurs before ACK and STB occurs before RD is permissible. (INTR = IBF • MASK • STB • RD + OBF • MASK
• ACK • WR)
PERIPHERAL
OUTPUT
INTR
INTR
ACK
OBF
BUS
ACK
STB
OBF
WR
IBF
WR
RD
CPU TO 82C55A
DATA FROM
(Continued)
21
tWIT
(28)
PERIPHERAL TO 82C55A
FIGURE 28. MODE 1 (STROBED OUTPUT)
tWOB
(21)
FIGURE 29. MODE 2 (BIDIRECTIONAL)
DATA FROM
tPS (17)
82C55A
tSIB
(23)
tPH (18)
(16)
tST
tWB (12)
tWOB (21)
(NOTE)
tAK (15)
82C55A TO PERIPHERAL
tAOB (22)
tAD (19)
DATA FROM
tAK
(15)
tAOB
(22)
tAIT (27)
tKD
(20)
82C55A TO CPU
tRIB (24)
DATA FROM
(NOTE)
November 16, 2006
FN2969.10