87C51 Intel Corporation, 87C51 Datasheet - Page 15

• Manufacturer Part Number: 87C51
• Description: CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
• Manufacturer: Intel Corporation

EXTERNAL DATA MEMORY WRITE CYCLE
EXTERNAL CLOCK DRIVE
All parameter values apply to all devices unless otherwise indicated In this
table 87C51 BH refers to 87C51 BH 87C51-1 BH-1 and 87C51-2 BH-2
EXTERNAL CLOCK DRIVE WAVEFORM
1 TCLCL
TCHCX
TCLCX
TCLCH
TCHCL
Symbol
Oscillator Frequency
High Time
Low Time
Rise Time
Fall Time
87C51 BH
87C51-1 BH-1
87C51-2 BH-2
87C51-24 BH-24
87C51 BH
8751-24 BH-24
87C51 BH
87C51-24 BH-24
87C51 BH
87C51-24 BH-24
87C51 BH
87C51-24 BH-24
Parameter
0 35TCLCL
0 35TCLCL
Min
3 5
3 5
0 5
3 5
20
20
0 65TCLCL
0 65TCLCL
Max
12
16
12
24
20
10
20
10
272335 –15
Units
MHz
MHz
MHz
MHz
ns
ns
ns
ns
ns
ns
ns
ns
87C51 80C51BH 80C31BH
272335-14
15