NTE6821 Datasheet, PDF (1/5 Pages) NTE Electronics – Integrated Circuit Peripheral Interface Adapter (PIA), NMOS, 1MHz

NTE6821
Integrated Circuit
Peripheral Interface Adapter (PIA),
NMOS, 1MHz
Description:
The NTE6821 is a peripheral interface adapter (PIA) in a 40–Lead DIP type package capable of inter-
facing the Microprocessing Unit (MPU) to peripherals through two 8–Bit bidirectional peripheral data
buses and four control lines. No external logic is required for interfacing to most peripheral devices.
The functional configuration of the PIA is programmed by the MPU during system initialization. Each
of the peripheral data lines can be programmed to act as an input or output, and each of the four con-
trol/interrupt lines may be programmed for one of several control modes. This allows a high degree
of flexibility in the over–all operation of the interface.
Features:
D 8–Bit Bidirectional Data Bus for Communication with the MPU
D Two Bidirectional 8–Bit Buses for Interface to Peripherals
D Two Programmed Control Registers
D Two Programmed Data Direction Registers
D Four Individually–Controlled Interrupt Input Lines; Two Usable as Peripheral Control Outputs
D Handshake Control Logic for Input and Output Peripheral Operation
D High–Impedance 3–State and Direct Transistor Drive Peripheral Lines
D Program Controlled Interrupt and Interrupt Disable Capability
D CMOS Drive Capability on Side A Peripheral Lines
D Two TTL Drive Capability on All A and B Side Buffers
D TTL Compatible
D Static Operation
Absolute Maximum Ratings: (Note 1)
Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +7V
Input Voltage, V_in . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +7V
Operating Temperature Range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Thermal Resistance, Junction to Ambient, R_ΘJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82.5°C/W
Note 1. This device contains circuitry to protect the inputs against damage due to high static voltages
or electric fields; however, it is advised that normal precautions be taken to avoid application
of any voltage higher than maximum rated voltages to this high impedance.