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PDF 74VHCT14A Data sheet ( Hoja de datos )
| Número de pieza | 74VHCT14A | |
| Descripción | HEX SCHMITT INVERTER | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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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
1 page  
74VHCT14A
3 Maximum rating
Maximum rating
stressing the device above the rating listed in the “absolute maximum ratings” table may
cause permanent damage to the device. these are stress ratings only and operation of the
device at these or any other conditions above those indicated in the operating sections of
this specification is not implied. exposure to absolute maximum rating conditions for
extended periods may affect device reliability. refer also to the STMicroelectronics sure
program and other relevant quality documents.
Table 4. Absolute maximum ratings
Symbol
Parameter
VCC Supply voltage
VI DC input voltage
VO DC output voltage (1)
VO DC output voltage (2)
IIK DC input diode current
IOK DC output diode current
IO DC output current
ICC DC supply current per supply pin
IGND DC ground current per supply pin
Tstg Storage temperature
TL Lead temperature (10 sec)
1. VCC = 0V
2. High or low state
Value
-0.5 to +7.0
-0.5 to +7.0
-0.5 to +7.0
-0.5 to VCC + 0.5
- 20
± 20
± 25
± 50
± 50
-65 to +150
300
Unit
V
V
V
V
mA
mA
mA
mA
mA
°C
°C
3.1
Recommended operating conditions
Table 5. Recommended operating conditions
Symbol
Parameter
VCC Supply voltage
VI Input voltage
VO Output voltage (1)
VO Output voltage (2)
Top Operating temperature
1. VCC = 0V
2. High or low state
Value
4.5 to 5.5
0 to 5.5
0 to 5.5
0 to VCC
-55 to 125
Unit
V
V
V
V
°C
5/15
5 Page 
74VHCT14A
Package mechanical data
DIM.
A
A1
A2
b
c
D
E
E1
e
K
L
MIN.
0.05
0.8
0.19
0.09
4.9
6.2
4.3
0˚
0.45
TSSOP14 MECHANICAL DATA
mm.
TYP
1
5
6.4
4.4
0.65 BSC
0.60
MAX.
1.2
0.15
1.05
0.30
0.20
5.1
6.6
4.48
8˚
0.75
MIN.
0.002
0.031
0.007
0.004
0.193
0.244
0.169
0˚
0.018
inch
TYP.
0.004
0.039
0.197
0.252
0.173
0.0256 BSC
0.024
MAX.
0.047
0.006
0.041
0.012
0.0089
0.201
0.260
0.176
8˚
0.030
A A2
A1 b
e
D
c
KL
E
PIN 1 IDENTIFICATION
1
E1
0080337D
11/15
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet 74VHCT14A.PDF ] | |
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