N87C51RA1 Intel, N87C51RA1 Datasheet - Page 11

• Manufacturer Part Number: N87C51RA1
• Description: IC MCU 8BIT 8K 16MHZ OTP 44-PLCC
• Manufacturer: Intel
• Series: 87Cr

Specifications of N87C51RA1

• Rohs Status: RoHS non-compliant
• Core Processor: MCS 51
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SIO
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-PLCC
• Eeprom Size: -
• Data Converters: -
• Other names: 806959

EXPLANATION OF THE AC SYMBOLS
Each timing symbol has 5 characters The first char-
acter is always a ‘T’ (stands for time) The other
characters depending on their positions stand for
the name of a signal or the logical status of that
signal The following is a list of all the characters and
what they stand for
AC CHARACTERISTICS
PSEN
EXTERNAL MEMORY CHARACTERISTICS
All parameter values apply to all devices unless otherwise indicated In this table 8XC51RX refers to
8XC51RX and 8XC51RX-1 8XC51RX-24 refers to 8XC51RX-20 and 8XC51RX-24
1 TCLCL Oscillator Frequency
TLHLL
TAVLL
TLLAX
TLLIV
TLLPL
TPLPH
TPLIV
TPXIX
Symbol
A Address
C Clock
D Input Data
H Logic level HIGH
I Instruction (program memory contents)
e
100 pF Load Capacitance for All Other Outputs
ALE Pulse Width
Address Valid to
ALE Low
Address Hold After
ALE Low
ALE Low to Valid
Instruction In
ALE Low to PSEN
Low
PSEN Pulse Width
PSEN Low to Valid
Instruction In
Input Instruction
Hold After PSEN
8XC51RX
8XC51RX-1
8XC51RX-20
8XC51RX-24
8XC51RX
8XC51RX-24
8XC51RX
8XC51RX-24
Description
Min
127
205
(Over Operating Conditions Load Capacitance for Port 0 ALE PROG and
Oscillator
43
53
53
0
12 MHz
Max
234
145
Min
105
Oscillator
60
10
20
20
0
20 MHz
Max
125
60
For example
Min
Oscillator
43
12
12
12
80
e
0
24 MHz
L Logic level LOW or ALE
P PSEN
Q Output Data
R RD signal
TLLPL
T Time
V Valid
W WR signal
X No longer a valid logic level
Z Float
TAVLL
80 pF)
Max
91
35
e
e
Time from ALE Low to PSEN Low
2 TCLCL
3 TCLCL
Time from Address Valid to ALE Low
TCLCL
TCLCL
TCLCL
Min
3 5
3 5
3 5
3 5
0
b
b
b
b
b
Oscillator
40
30
30
Variable
40
45
4 TCLCL
3 TCLCL
4 TCLCL
3 TCLCL
8XC51RA RB RC
Max
12
16
20
24
b
b
b
b
100
105
75
90
Units
MHz
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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