IC MICRO CTRL 24MHZ 44PLCC

AT89C51-24JI

Manufacturer Part NumberAT89C51-24JI
DescriptionIC MICRO CTRL 24MHZ 44PLCC
ManufacturerAtmel
Series89C
AT89C51-24JI datasheet
 


Specifications of AT89C51-24JI

Core Processor8051Core Size8-Bit
Speed24MHzConnectivityUART/USART
Number Of I /o32Program Memory Size4KB (4K x 8)
Program Memory TypeFLASHRam Size128 x 8
Voltage - Supply (vcc/vdd)4 V ~ 6 VOscillator TypeInternal
Operating Temperature-40°C ~ 85°CPackage / Case44-PLCC
Lead Free Status / RoHS StatusContains lead / RoHS non-compliantEeprom Size-
Data Converters-Peripherals-
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Serial Port Timing: Shift Register Mode Test Conditions
(V
= 5.0 V 20%; Load Capacitance = 80 pF)
CC
Symbol
Parameter
t
Serial Port Clock Cycle Time
XLXL
t
Output Data Setup to Clock Rising Edge
QVXH
t
Output Data Hold after Clock Rising Edge
XHQX
t
Input Data Hold after Clock Rising Edge
XHDX
t
Clock Rising Edge to Input Data Valid
XHDV
Shift Register Mode Timing Waveforms
INSTRUCTION
0
ALE
CLOCK
t
QVXH
WRITE TO SBUF
OUTPUT DATA
CLEAR RI
INPUT DATA
AC Testing Input/Output Waveforms
V
- 0.5V
CC
0.2 V
CC
TEST POINTS
0.2 V
CC
0.45V
Note:
1. AC Inputs during testing are driven at V
logic 1 and 0.45V for a logic 0. Timing measurements
are made at V
min. for a logic 1 and V
IH
logic 0.
AT89C51
14
12 MHz Osc
Min
1.0
700
50
0
1
2
3
t
XLXL
t
XHQX
0
1
2
t
XHDX
t
XHDV
VALID
VALID
VALID
(1)
Float Waveforms
+ 0.9V
V
- 0.1V
- 0.5V for a
Note:
CC
max. for a
IL
Variable Oscillator
Max
Min
Max
12t
CLCL
10t
-133
CLCL
2t
-117
CLCL
0
700
10t
CLCL
4
5
6
7
3
4
5
6
VALID
VALID
VALID
VALID
(1)
V
+ 0.1V
LOAD
Timing Reference
LOAD
Points
- 0.1V
V
LOAD
1. For timing purposes, a port pin is no longer floating
when a 100 mV change from load voltage occurs. A
port pin begins to float when 100 mV change from
the loaded V
/V
level occurs.
OH
OL
Units
µs
ns
ns
ns
-133
ns
8
7
SET TI
VALID
SET RI
V
- 0.1V
OL
V
+ 0.1V
OL