NTE3882 NTE ELECTRONICS, NTE3882 Datasheet

IC COUNT TIMER CONTROL 1MHZ 5.25V 28-DIP

NTE3882

Manufacturer Part Number
NTE3882
Description
IC COUNT TIMER CONTROL 1MHZ 5.25V 28-DIP
Manufacturer
NTE ELECTRONICS
Datasheet

Specifications of NTE3882

No. Of Timers
1
Clock External Input
Yes
Supply Voltage Range
4.75V To 5.25V
Digital Ic Case Style
DIP
No. Of Pins
28
Operating Temperature Range
0°C To +70°C
Frequency
1MHz
Description:
The NTE3882 Counter Timer Circuit (CTC) is a programmable, four channel device in a 28–Lead DIP
type package that provides counting and timing functions for the NTE3880. The NTE3880 configures
the NTE3882’s four independent channels to operate under various modes and conditions as
required.
The internal structure of the NTE3882 consists of an NTE3880 bus interface, internal control logic,
four counter channels, and interrupt control logic. Each channel has an interrupt vector for automatic
interrupt vectoring, and interrupt priority is determined by channel number with channel
highest priority.
The channel logic is composed of 2 registers, 2 counters and control logic. The registers include and
8–bit time constant register and an 8–bit channel control register. The counters include as 8–bit read-
able down counter and an 8–bit prescaler. The prescaler may be programmed to divide the system
clock by either 16 or 256.
Structure:
D N–Channel Silicon Gate Depletion Load Technology
D Single 5V Supply
D Single Phase 5V Clock
D Four Independent Programmable 8–Bit Counter/16–Bit Timer Channels
Features:
D Each Channel may be Selected to Operate in Either a Counter Mode or Timer Mode
D Programmable Interrupts on Counter or Timer States
D A Time Constant Register Automatically Reloads, the Down Counter at Zero and the Cycle is
D Readable Down Counter Indicates Number of Counts–to–Go until Zero
D Selectable 16 or 256 Clock Prescaler for Each Timer Channel
D Selectable Positive or Negative Trigger may Initiate Timer Operation
D Three Channels have Zero Count/Timeout Outputs capable of Driving Darlington Transistors
D Daisy Chain Priority Interrupt Logic Included to Provide for Automatic Interrupt Vectoring without
D All Inputs and Outputs Fully TTL Compatible
Repeated
External Logic
NMOS, Counter Timer Control (CTC)
Integrated Circuit
NTE3882
having the

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NTE3882 Summary of contents

Page 1

... NMOS, Counter Timer Control (CTC) Description: The NTE3882 Counter Timer Circuit (CTC programmable, four channel device in a 28–Lead DIP type package that provides counting and timing functions for the NTE3880. The NTE3880 configures the NTE3882’s four independent channels to operate under various modes and conditions as required ...

Page 2

Absolute Maximum Ratings: Temperature Under Bias . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

AC Characteristics (Cont’d): (T Parameter Clock to Data Out Delay Clock to Data Out Float Delay Data In to Clock Setup Time M1 to Clock Setup Time (INTA or M1 Cycle IEO Delay (Interrupt Immediately Preceding M1) IORQ ...

Page 4

Max .100 (2.54) 1.300 (33.02 .540 (13.7) .250 (6.35) .122 (3.1) .600 Min (15.24) ...

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