NTE3881 NTE ELECTRONICS, NTE3881 Datasheet
NTE3881
Manufacturer Part Number
NTE3881
Description
IC, I/O INTERFACE, 8BIT, 4MHZ, DIP-40
Manufacturer
NTE ELECTRONICS
Datasheet
1.NTE3881.pdf
(4 pages)
Specifications of NTE3881
Chip Configuration
8 Bit
Bus Frequency
4MHz
No. Of I/o's
8
Supply Voltage Range
4.75V To 5.25V
Digital Ic Case Style
DIP
No. Of Pins
40
Termination Type
Through Hole
Filter Terminals
Through Hole
Description:
The NTE3881 Parallel I/O Circuit (PIO) is a programmable, two port device which provides a TTL
compatible interface between peripheral devices and the NTE3880. The Central Processing Unit
(CPU) can configure the NTE3881 to interface with a wide range of peripheral devices with no other
external logic required. Typical peripheral devices that are fully compatible with the NTE3881 include
most keyboard, paper tape readers and punches, printers, PROM programmers, etc. The NTE3881
utilizes N channel silicon gate depletion load technology and is packaged in a 40–Lead DIP type package.
Features:
D Two Independent 8–Bit Bidirectional Peripheral Interface Ports with “Handshake” Data Transfer
D Interrupt Driven “Handshake” for Fast Response
D Any One of Four Distinct Modes of Operation may be Selected for a Port, including:
D All with Interrupt Controlled Handshake
D Daisy Chain Priority Interrupt Logic Included to Provide for Automatic Interrupt Vectoring without
D Eight Outputs are Capable of Driving Darlington Transistors
D All Inputs and Outputs Fully TTL Compatible
D Single 5 Volt Supply and Single Phase Clock Required
Absolute Maximum Ratings:
Temperature Under Bias
Storage Temperature Range
Voltage On Any Pin With Respect to GND
Power Dissipation
Note 1. Stresses above those listed under “Absolute Maximum Ratings” may cause permanent
Control
External Logic
damage to the device. This is a stress rating only functional operation of the device at these
or any other condition above those indicated in the operational sections of this specification
is not implied. Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
Byte Output
Byte Input
Byte Bidirectional Bus (Available on Port A Only)
Bit Control Mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NMOS, Parallel I/O Interface (PIO), 4MHz
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Integrated Circuit
NTE3881
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–65 to +150 C
–0.3V to +7V
0 to +70 C
6W
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NTE3881 Summary of contents
Page 1
... The NTE3881 Parallel I/O Circuit (PIO programmable, two port device which provides a TTL compatible interface between peripheral devices and the NTE3880. The Central Processing Unit (CPU) can configure the NTE3881 to interface with a wide range of peripheral devices with no other external logic required. Typical peripheral devices that are fully compatible with the NTE3881 include most keyboard, paper tape readers and punches, printers, PROM programmers, etc. The NTE3881 utilizes N channel silicon gate depletion load technology and is packaged in a 40– ...
Page 2
DC Characteristics Parameter Clock Input Low Voltage Clock Input High Voltage Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage Power Supply Current Input Leakage Current Tri–State Output Leakage ...
Page 3
AC Characteristics (Cont’d): (T Parameter M1 to IEO Delay (Interrupt Immediately Preceding M1) IEI to IORQ Setup Time (INTA Cycle) IEI to IEO Delay IEI to IEO Delay (after ED Decode) IORQ to Clock Setup Time (To Activate READY on ...
Page 4
Max .650 (16.5) ...