74VHC238TTR datasheet(1/12 Pages) STMICROELECTRONICS

部品番号	74VHC238TTR

部品情報	3 TO 8 LINE DECODER

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November 2004

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HIGH SPEED: tPD = 5.5 ns (TYP.) at VCC = 5V

s

LOW POWER DISSIPATION:

ICC = 4 µA (MAX.) at TA=25°C

s

HIGH NOISE IMMUNITY:

VNIH = VNIL = 28% VCC (MIN.)

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POWER DOWN PROTECTION ON INPUTS

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SYMMETRICAL OUTPUT IMPEDANCE:

|IOH| = IOL = 8 mA (MIN)

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BALANCED PROPAGATION DELAYS:

tPLH ≅ tPHL

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OPERATING VOLTAGE RANGE:

VCC(OPR) = 2V to 5.5V

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PIN AND FUNCTION COMPATIBLE WITH

74 SERIES 238

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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 C2MOS 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.

Tree 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 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.

74VHC238

3 TO 8 LINE DECODER

Figure 1: Pin Connection And IEC Logic Symbols

Table 1: Order Codes

PACKAGE

T & R

SOP

74VHC238MTR

TSSOP

74VHC238TTR

TSSOP

SOP

Rev. 4

同様の部品番号 - 74VHC238TTR

メーカー	部品番号	データシート	部品情報
STMicroelectronics	74VHC238T	64Kb / 8P	3 TO 8 LINE DECODER Jun-1999

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同様の説明 - 74VHC238TTR

メーカー	部品番号	データシート	部品情報
STMicroelectronics	74VHC238	64Kb / 8P	3 TO 8 LINE DECODER Jun-1999
STMicroelectronics	74VHCT238A	63Kb / 8P	3 TO 8 LINE DECODER Mar-2000
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