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74VHC238 데이터시트(PDF) 1 Page - STMicroelectronics

부품명 74VHC238
상세설명  3 TO 8 LINE DECODER
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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74VHC238 데이터시트(HTML) 1 Page - STMicroelectronics

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74VHC238
3 TO 8 LINE DECODER
June 1999
s
HIGH SPEED: tPD =5.5 ns (TYP.) at VCC =5V
s
LOW POWER DISSIPATION:
ICC =4
µA (MAX.) at TA =25 oC
s
HIGH NOISE IMMUNITY:
VNIH =VNIL =28% VCC (MIN.)
s
POWER DOWN PROTECTION ON INPUTS
s
SYMMETRICAL OUTPUT IMPEDANCE:
|IOH|=IOL = 8 mA (MIN)
s
BALANCED PROPAGATION DELAYS:
tPLH
≅ tPHL
s
OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 5.5V
s
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 238
s
IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The 74VHC238 is an advanced high-speed
CMOS 3 TO 8 LINE DECODER fabricated with
sub-micron silicon gate and double-layer metal
wiring C
2MOS technology.
If the device is enabled, 3 binary select inputs (A,
B and C) determine which one of the outputs will
go high. If enable input G1 is held low or either
G2A or G2B is held high, decoding function is
inhibited and all the 8 outputs go to low.
Three enable inputs are provided to ease
cascade connection and application of this
address decoders for memory systems.
Power down protection is provided on all inputs
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
M1
(Micro Package)
T
(TSSOP Package)
ORDER CODES :
74VHC238M
74VHC238T
®
1/8


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