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PDF 74VHCT138A Data sheet ( Hoja de datos )
| Número de pieza | 74VHCT138A | |
| Descripción | 3 TO 8 LINE DECODER INVERTING | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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® 74VHCT138A
3 TO 8 LINE DECODER (INVERTING)
s HIGH SPEED: tPD = 7.6 ns (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 4 µA (MAX.) at TA = 25 oC
s COMPATIBLE WITH TTL OUTPUTS:
VIH = 2V (MIN), VIL = 0.8V (MAX)
s POWER DOWN PROTECTION ON INPUTS &
OUTPUTS
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 8 mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 138
s IMPROVED LATCH-UP IMMUNITY
s LOW NOISE: VOLP = 0.8V (Max.)
DESCRIPTION
The 74VHCT138A is an advanced high-speed
CMOS 3 TO 8 LINE DECODER (INVERTING)
fabricated with sub-micron silicon gate and
double-layer metal wiring C2MOS technology.
If the device is enabled, 3 binary select inputs (A,
B and C) determine which one of the outputs will
go low. If enable input G1 is held low or either
PRELIMINARY DATA
SOP
TSSOP
PACKAGE
SOP
TSSOP
ORDER CODES
T UB E
T&R
74VHCT138AM 74VHCT138AMTR
74VHCT138ATTR
G2A or G2B is held high, the decoding function is
inhibited and all the 8 outputs go to high.
Three enable inputs are provided to ease
cascade connection and application of address
decoders for memory systems.
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.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
March 2000
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1 page  
74VHCT138A
WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING OUTPUTS (f=1MHz; 50% duty cycle)
WAVEFORM 2: PROPAGATION DELAYS FOR NON-INVERTING OUTPUTS (f=1MHz; 50% duty cycle)
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5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet 74VHCT138A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| 74VHCT138 | 3 TO 8 LINE DECODER INVERTING | STMicroelectronics |
| 74VHCT138A | 3 TO 8 LINE DECODER INVERTING | STMicroelectronics |
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