N80C251TB24 Intel, N80C251TB24 Datasheet - Page 33

• Manufacturer Part Number: N80C251TB24
• Description: IC MPU 8-BIT 5V 24MHZ 44-PLCC
• Manufacturer: Intel
• Series: 80Cr

Specifications of N80C251TB24

• Rohs Status: RoHS non-compliant
• Core Processor: MCS 251
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SIO
• Peripherals: PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: 816721

T
T
T
T
T
T
T
T
NOTES:
1. W = 0, 1, 2 — is the number of real time wait states.
2. Device configured with the extended data float timing.
CLYV
CLYX
RLYV
RLYVA
RLYX
WLYV
WLYVA
WLYX
Symbol
WAIT#
WCLK
WR#
ALE
Wait Clock Low to Wait Set-up
Wait Hold after Wait Clock Low
PSEN#/RD# Low to Wait Set-up
PSEN#/RD# Low to Wait Set-up
Wait Hold after PSEN#/RD# Low
WR# Low to Wait Set-up
WR# Low to Wait Set-up
Wait Hold after WR# Low
P2
P0
A15:8
Figure 14. External Bus Cycle: Data Write (Page Mode)
State 1
T
T
WLYX
WLYX
Parameter
T
WLYV
max
Table 13. Real-Time Wait AC Timing
min
8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
State 2
A7:0
T
CLYV
D7:0
T
CLYX
WR# stretched
(2W)T
(2W)T
(2W)T
State 3
min
Min
OSC
OSC
OSC
0
0
0
0
0
T
CLYX
+ 5
+ 5
+ 5
max
(1+2W)T
(1+2W)T
(1+2W)T
stretched
stretched
T
T
T
T
T
OSC
OSC
OSC
OSC
OSC
State 4
Max
OSC
OSC
OSC
– 13
– 13
– 35
– 13
– 35
– 20
– 20
– 20
A5003-02
ns (1)
ns (2)
ns (1)
ns (2)
ns (1)
Units
ns
ns
ns
27