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參數(shù)資料
| 型號： | MC3456P |
| 廠商： | MOTOROLA INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | DUAL TIMING CIRCUIT |
| 中文描述： | DUAL PULSE; RECTANGULAR, TIMER, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 200K |
| 代理商： | MC3456P |
Device
Operating
Temperature Range
Package
SEMICONDUCTOR
TECHNICAL DATA
DUAL TIMING CIRCUIT
ORDERING INFORMATION
MC3456P
NE556D
0
°
to +70
°
C
Plastic DIP
SO–14
PIN CONNECTIONS
Order this document by MC3456/D
P SUFFIX
PLASTIC PACKAGE
CASE 646
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO–14)
(Top View)
Discharge A
Threshold A
Control A
Reset A
Output A
Trigger A
Gnd
VCC
Discharge B
Threshold B
Control B
Reset B
Output B
Trigger B
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
MOTOROLA ANALOG IC DEVICE DATA
The MC3456 dual timing circuit is a highly stable controller capable of
producing accurate time delays, or oscillation. Additional terminals are
provided for triggering or resetting if desired. In the time delay mode of
operation, the time is precisely controlled by one external resistor and
capacitor per timer. For astable operation as an oscillator, the free running
frequency and the duty cycle are both accurately controlled with two external
resistors and one capacitor per timer. The circuit may be triggered and reset
on falling waveforms, and the output structure can source or sink up to
200 mA or drive MTTL circuits.
Direct Replacement for NE556/SE556 Timers
Timing from Microseconds through Hours
Operates in Both Astable and Monostable Modes
Adjustable Duty Cycle
High Current Output can Source or Sink 200 mA
Output can Drive MTTL
Temperature Stability of 0.005% per
°
C
Normally “On” or Normally “Off” Output
Dual Version of the Popular MC1455 Timer
Figure 1. 22 Second Solid State Time Delay Relay Circuit
Figure 2. Block Diagram
(1/2 Shown)
Figure 3. General Test Circuit
Test circuit for measuring DC parameters (to set output and measure parameters):
a) When VS
2/3 VCC, VO is low.
b) When VS
1/3 VCC, VO is high.
c) When VO is low, Pin 7 sinks current. To test for Reset, set VO high,
c)
apply Reset voltage, and test for current flowing into Pin 7. When Reset
c)
is not in use, it should be tied to VCC.
1.0 k
Load
MT2
10 k
0.1
μ
F
0.01
μ
F
1
5
2
4
3
8
6
7
1.0
μ
F
C
20 M
G
MT1
–10 V
1N4003
1
1N4740
3.5 k
250 V
+
t = 1.1; R and C = 22 sec
Time delay (t) is variable by
changing R and C (see Figure 16).
–
μ
F
VCC
Threshold
Control Voltage
Trigger
2 (12)
3 (11)
6 (8)
5 k
14
5 k
5 k
+
Comp
A
–
+
Comp
B
–
7
Gnd
Reset
4 (10)
R
S
Flip
Flop
Q
Inhibit/
Reset
1 (13)
5 (9)
Discharge
Output
R
1/2
MC3456
VR
Reset
5
4
8
ICC
VCC
700
Discharge
6
Threshold
7
Ith
2.0 k
VS
Trigger
2
Gnd
1
3
ISink
ISource
VO
0.01
μ
F
+
Control
Voltage
Output
VCC
1/2
MC3456
Motorola, Inc. 1996
Rev 2
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