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74HC5555 датащи(PDF) 2 Page - NXP Semiconductors

номер детали 74HC5555
подробное описание детали  Programmable delay timer with oscillator
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
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74HC5555 датащи(HTML) 2 Page - NXP Semiconductors

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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 224
• 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 VCC 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
• ICC 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; Tamb = 25 °C; tr = tf = 6 ns.
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW):
PD = CPD x VCC2 x fi + Σ(CL x VCC2 x fo) where:
fi = input frequency in MHz
fo = output frequency in MHz
Σ(CL x VCC2 x fo) = sum of outputs.
CL = output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC − 1.5 V.
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
TYP.
UNIT
tPHL/tPLH
propagation delay
CL = 15 pF;
VCC = 5 V
A, B to Q/Q24
24
ns
MR to Q/Q19
20
ns
RS to Q/Q26
28
ns
CI
input capacitance
3.5
3.5
pF
CPD
power dissipation
capacitance per buffer
notes 1 and 2
23
36
pF
EXTENDED TYPE
NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
74HC/HCT5555N
16
DIL
plastic
SOT38Z
74HC/HCT5555D
16
SO16
plastic
SOT109A


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