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부품번호 | 74VHCT14A 기능 |
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기능 | HEX SCHMITT INVERTER | ||
제조업체 | STMicroelectronics | ||
로고 | |||
전체 15 페이지수
74VHCT14A
HEX SCHMITT inverter
Features
■ High speed: tPD = 5.5ns (typ.) at VCC = 5V
■ Low power dissipation:
ICC = 2 µA (Max.) at TA = 25°C
■ Typical hysteresis: Vh = 0.7V at VCC = 4.5V
■ Power down protection on inputs & outputs
■ Symmetrical output impedance:
|IOH| = IOL = 8 mA (Min)
■ Balanced propagation delays:
tPLH ≅ tPHL
■ Operating voltage range:
VCC(Opr) = 4.5V to 5.5V
■ Pin and function compatible with
74 series 14
■ Improved latch-up immunity
■ Low noise: VOLP = 0.8V (Max.)
Description
The 74VHCT14A is an advanced high-speed
CMOS HEX SCHMITT inverter fabricated with
sub-micron silicon gate and double-layer metal
wiring C2MOS technology.
The internal circuit is composed of 3 stages
including buffer output, which provides high noise
immunity and stable output.
Power down protection is provided on all inputs
and outputs and 0 to 7V can be accepted on
inputs with no regard to the supply voltage. This
device can be used to interface 5V to 3V since all
inputs are equipped with TTL threshold.
SO-14
TSSOP14
Pin configuration and function are the same as
those of the 74VHC04 but the 74VHC14 has
hysteresis.
This together with its schmitt trigger function
allows it to be used on line receivers with slow
rise/fall input signals.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
Table 1. Device summary
Part number
74VHCT14AMTR
74VHCT14ATTR
Package
SO-14
TSSOP14
Packaging
Tape and reel
Tape and reel
May 2007
Rev 2
1/15
www.st.com
15
Pin settings
2 Pin settings
2.1 Pin connection
Figure 3. Pin connection (top through view)
74VHCT14A
2.2
2.3
Pin description
Table 2. Pin description
Pin N°
1, 3, 5, 9, 11, 13
2, 4, 6, 8, 10, 12
7
14
Symbol
1A to 6A
1Y to 6Y
GND
VCC
Truth table
Table 3. Truth table
Inputs
A
L
H
Name and function
Data inputs
Data outputs
Ground (0V)
Positive supply voltage
Output
Y
H
L
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4페이지 74VHCT14A
Electrical characteristics
Table 7. AC electrical characteristics (Input tr = tf = 3ns)
Test condition
Value
Symbol
Parameter
VCC CL
(1)(V) (pF)
TA = 25°C
-40 to 85°C
-55 to
125°C
Unit
Min. Typ. Max. Min. Max. Min. Max.
tPLH Propagation delay 5.0 15
tPHL time
5.0 50
5.5 7.6 1.0 8.5 1.0 9.5 ns
6.7 8.0 1.0 9.5 1.0 10.5
1. Voltage range is 5.0V ± 0.5V
Table 8. Capacitive characteristics
Test condition
Value
Symbol
Parameter
TA = 25°C
-40 to 85°C
-55 to
125°C
Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input capacitance
6 10 10 10 pF
CPD
Power dissipation
capacitance (1)
20
pF
1. CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current
consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation.
ICC(opr) = CPD x VCC x fIN + ICC/6 (per gate)
Table 9. Dynamic switching characteristics
Test condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to
125°C
Unit
Min. Typ. Max. Min. Max. Min. Max.
VOLP
VOLV
Dynamic low
voltage quiet
output (1) (2)
5.0
0.3 0.8
-0.8 -0.3
V
VIHD
Dynamic high
voltage input (1) (3)
5.0
CL = 50 pF
2.0
V
VILD
Dynamic low
voltage input (1) (3) 5.0
0.6 V
1. Worst case package.
2. Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND.
3. Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (VILD),
0V to threshold (VIHD), f = 1MHz.
7/15
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부품번호 | 상세설명 및 기능 | 제조사 |
74VHCT14 | Hex Schmitt Inverter | Fairchild Semiconductor |
74VHCT14 | HEX SCHMITT INVERTER | STMicroelectronics |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |