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UA2240C PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 UA2240C
部品説明 PROGRAMMABLE TIMER/COUNTER
メーカ Texas
ロゴ Texas ロゴ 



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UA2240C Datasheet, UA2240C PDF,ピン配置, 機能
uA2240C
PROGRAMMABLE TIMER/COUNTER
SLFS045 – JUNE 1978 – REVISED MAY 1988
D Accurate Timing From Microseconds to
Days
N PACKAGE
(TOP VIEW)
D Programmable Delays From 1 Time
Constant to 255 Time Constants
D Outputs Compatible With TTL and CMOS
D Wide Supply-Voltage Range
D External Sync and Modulation Capability
OUTPUTS
Q0 1
Q1 2
Q2 3
Q3 4
Q4 5
16 VCC
15 REGULATOR
14 TIME BASE
13 R/C
12 MODULATION
OUTPUTS
description
Q5 6
Q6 7
11 TRIGGER
10 RESET
INPUTS
The uA2240C consists of a time-base oscillator,
Q7 8
9 GND
an 8-bit counter, a control flip-flop, and a voltage
regulator. The frequency of the time-base oscillator is set by the time constant of an external resistor and
capacitor at R/C and can be synchronized or modulated by signals applied to the modulation input. The output
of the time-base section is applied directly to the input of the counter section and also appears at (TIME BASE).
TIME BASE may be used to monitor the frequency of the oscillator, to provide an output pulse to other circuitry,
or (with the time-base section disabled) to drive the counter input from an external source. The counter input
is activated on a negative-going transition. The reset input stops the time-base oscillator and sets each binary
output, Q0–Q7, and the time-base output to a TTL high level. After resetting, the trigger input starts the oscillator
and all Q outputs go low. Once triggered, the uA2240C will ignore any signals at the trigger input until it is reset.
The uA2240C timer/counter may be operated in the free-running mode or with output-signal feedback to the
reset input for automatic reset. Two or more binary outputs may be connected together to generate complex
pulse patterns, or each output may be used separately to provide eight output frequencies. Using two circuits
in cascade can provide precise time delays of up to three years.
The uA2240C is characterized for operation from 0°C to 70°C.
AVAILABLE OPTIONS
SYMBOLIZATION
OPERATING
DEVICE
PACKAGE SUFFIX TEMPERATURE RANGE
uA2240C
N
0°C to 70°C
VT max
AT 25°C
2V
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1988, Texas Instruments Incorporated
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
POST OFFICE BOX 1443 HOUSTON, TEXAS 77251–1443
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