N80C251TB24 Intel, N80C251TB24 Datasheet - Page 19

• 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

V
V
I
I
I
R
C
I
I
I
NOTES:
1. Under steady-state (non-transient) conditions, I
2. Capacitive loading on ports 0 and 2 may cause spurious noise pulses above 0.4 V on the low-level outputs of ALE and
3. Capacitive loading on ports 0 and 2 causes the V
Typical values are obtained using V
IL
LI
TL
PD
DL
CC
Symbol
OH1
OH2
RST
IO
If I
greater than the listed test conditions.
ports 1, 2, and 3. The noise is due to external bus capacitance discharging into the port 0 and port 2 pins when these pins
change from high to low. In applications where capacitive loading exceeds 100 pF, the noise pulses on these signals may
exceed 0.8 V. It may be desirable to qualify ALE or other signals with a Schmitt trigger or CMOS-level input logic.
lines are stabilizing.
• Maximum I
• Maximum I
• Maximum Total I
OL
port 0
ports 1–3
all output pins
exceeds the test conditions, V
Output High Voltage
(Port 0 in External
Address)
Output High Voltage
(Port 2 in External
Address during Page
Mode)
Logical 0 Input
Current (Port 1, 2, 3)
Input Leakage
Current (Port 0)
Logical 1-to-0
Transition Current
(Port 1, 2, 3)
RST Pulldown
Resistor
Pin Capacitance
Powerdown Current
Idle Mode Current
Operating Current
OL
OL
Parameter
per port pin:10 mA
per 8-bit port:
OL
Table 9. DC Characteristics at V
for
26 mA
15 mA
71 mA
CC
OL
= 5.0, T
may exceed the related specification. Pins are not guaranteed to sink current
8xC251TB/TQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER
V
V
V
V
V
V
CC
CC
CC
CC
CC
CC
A
Min
= 25°C and are not guaranteed.
40
– 0.7
– 1.5
– 0.3
– 0.3
– 0.7
– 1.5
OL
OH
must be externally limited as follows:
on ALE and PSEN# to drop below the specification when the address
(Note 4)
(Note 4)
(Note 4)
(Note 4)
Typical
CC
10
10
35
70
= 4.5 – 5.5 V (Sheet 2 of 2)
+/-10
-650
Max
225
-50
20
44
83
Units
mA
mA
µA
µA
µA
k
pF
µA
V
V
I
I
I
I
I
I
V
0.45 < V
V
F
T
F
F
Test Conditions
OH
OH
OH
OH
OH
OH
A
OSC
OSC
OSC
IN
IN
= 25 °C
= -200 µA
= -3.2 mA
= -7.0 mA
= -200 µA
= -3.2 mA
= -7.0 mA
= 0.45 V
= 2.0 V
= 24 MHz
= 24 MHz
= 24 MHz
IN
< V
CC
13