AT87C51RB2-3CSUM Atmel, AT87C51RB2-3CSUM Datasheet - Page 71
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AT87C51RB2-3CSUM
Manufacturer Part Number
AT87C51RB2-3CSUM
Description
IC 8051 MCU 16K OTP 40MHZ 40DIP
Manufacturer
Atmel
Series
87Cr
Datasheet
1.TS87C51RB2-VIA.pdf
(86 pages)
Specifications of AT87C51RB2-3CSUM
Core Processor
8051
Core Size
8-Bit
Speed
40/20MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (16K x 8)
Program Memory Type
OTP
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
11.5.11
11.5.12
Figure 11-11. External Clock Drive Waveforms
11.5.13
Figure 11-12. AC Testing Input/Output Waveforms
11.5.14
Figure 11-13. Float Waveforms
4188F–8051–01/08
T
CHCX
Symbol
T
T
T
T
T
CHCX
CLCX
CLCH
CHCL
CLCL
/T
External Clock Drive Characteristics (XTAL1)
External Clock Drive Waveforms
AC Testing Input/Output Waveforms
Float Waveforms
CLCX
INPUT/OUTPUT
Parameter
Oscillator Period
High Time
Low Time
Rise Time
Fall Time
Cyclic ratio in X2 mode
0.45 V
V
CC
-0.5 V
AC inputs during testing are driven at V
measurement are made at V
For timing purposes a port pin is no longer floating when a 100 mV change from load voltage
occurs and begins to float when a 100 mV change from the loaded V
≥ ± 20mA.
V
CC
0.2V
0.45 V
-0.5 V
0.7V
V
V
OH
OL
CC
T
-0.1 V
+0.1 V
CC
CHCL
-0.1 V
FLOAT
V
LOAD
IH
min for a logic “1” and V
T
CLCX
0.2V
0.2V
CC
CC
CC
+0.9
-0.1
- 0.5 for a logic “1” and 0.45V for a logic “0”. Timing
T
V
V
CLCL
Min
LOAD
LOAD
25
40
5
5
+0.1 V
T
-0.1 V
CLCH
T
CHCX
IL
max for a logic “0”.
AT/TS8xC51Rx2
Max
60
5
5
OH
/V
OL
level occurs. I
Units
ns
ns
ns
ns
ns
%
OL
/I
71
OH