參數(shù)資料
型號： 74HC5555
廠商： NXP Semiconductors N.V.
英文描述： Programmable delay timer with oscillator
中文描述： 與振蕩器可編程延遲計時器
文件頁數(shù)： 2/23頁
文件大?。?/td> 142K
代理商： 74HC5555
September 1993
2
Philips Semiconductors
Product specification
Programmable delay timer with oscillator
74HC/HCT5555
FEATURES
Positive and negative edge
triggered
Retriggerable or non-retriggerable
Programmable delay
minimum: 100 ns
maximum: depends on input
frequency and division ratio
Divide-by range of 2 to 2
24
Direct reset terminates output
pulse
Very low power consumption in
triggered start mode
3 oscillator operating modes:
– RC oscillator
– Crystal oscillator
– External oscillator
Device is unaffected by variations
in temperature and V
CC
when using
an external oscillator
Automatic power-ON reset
Schmitt trigger action on both
trigger inputs
Direct drive for a power transistor
Low power consumption in active
mode with respect to TTL type
timers
High precision due to digital timing
Output capability: 20 mA
I
CC
category: MSI.
APPLICATIONS
Motor control
Attic fan timers
Delay circuits
Automotive applications
Precision timing
Domestic appliances.
GENERAL DESCRIPTION
The 74HC/HCT5555 are high-speed
Si-gate CMOS devices and are pin
compatible with low power Schottky
TTL (LSTTL). They are specified in
compliance with JEDEC standard
no. 7A.
The 74HC/HCT5555 are precision
programmable delay timers which
consist of:
24-stage binary counter
integrated oscillator (using external
timing components)
retriggerable/non-retriggerable
monostable
automatic power-ON reset
output control logic
oscillator control logic
overriding asynchronous master
reset (MR).
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns.
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W):
P
D
= C
PD
x V
CC2
x f
i
+
Σ
(C
L
x V
CC2
x f
o
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
Σ
(C
L
x V
CC2
x f
o
) = sum of outputs.
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
1.5 V.
2.
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
TYP.
UNIT
t
PHL
/t
PLH
propagation delay
A, B to Q/Q
MR to Q/Q
RS to Q/Q
input capacitance
power dissipation
capacitance per buffer
C
L
= 15 pF;
V
CC
= 5 V
24
19
26
3.5
23
24
20
28
3.5
36
ns
ns
ns
pF
pF
C
I
C
PD
notes 1 and 2
EXTENDED TYPE
NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
74HC/HCT5555N
74HC/HCT5555D
16
16
DIL
SO16
plastic
plastic
SOT38Z
SOT109A
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74HC5555D 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER W/OSC RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel
74HC5555D,112 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel
74HC5555D,118 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER W/SCH TRIGGER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel
74HC5555N 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER W/SCH TRIGGER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel
74HC5555N,112 功能描述:計時器和支持產(chǎn)品 PROG DELAY TIMER RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel
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