MC14500B

Features:

• 16 Instructions
• DC to 1.0 MHz Operation at V_DD = 5 V
• OnChip Clock (Oscillator)
• Executes One Instruction per Clock Cycle
• 3 to 18 V Operation
• Low Quiescent Current Characteristic of CMOS Devices
• Capable of Driving One LowPower Schottky Load or Two LowPower TTL Loads over Full Temperature Range


Pinout




Specifications

Symbol	Characteristic	Value	Unit
VDD	DC Supply Voltage	0.5 to + 18.0	V
Vin, Vout	Input or Output Voltage (DC or Transient)	0.5 to VDD + 0.5	V
Iin, Iout	Input Current (DC or Transient), per Pin	± 10	V
PD	Power Dissipation per Package	500	mW
Tstg	Storage Temperature	65 to + 150
TL	Lead Temperature, 1 mm from Case for 10 Seconds	260

* Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:
  Plastic "P and D/DW" Packages: 7.0 mW/ From 65 To 125
  Ceramic "L" Packages: 12 mW/ From 100 To 125

This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages
to this highimpedance circuit. For proper operation, Vin and Vout should be constrained to the range VSS  (V_in or V_out)  V_DD. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either V_SS or V_DD). Unused outputs must be left open.


Description

The MC14500B Industrial Control Unit (ICU) is a singlebit CMOS processor. The ICU is designed for use in systems requiring decisions based on successive singlebit information. An external ROM stores the control program. With a program counter (and output latches and input multiplexers, if MC14500B is required) the ICU in a system forms a storedprogram controller that replaces combinatorial logic. Applications include relay logic processing, serial data manipulation and control. The ICU also may control an MPU or be controlled by an MPU.