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M74HC257 の電気的特性と機能

M74HC257のメーカーはST Microelectronicsです、この部品の機能は「QUAD 2 CHANNEL MULTIPLEXER」です。


製品の詳細 ( Datasheet PDF )

部品番号 M74HC257
部品説明 QUAD 2 CHANNEL MULTIPLEXER
メーカ ST Microelectronics
ロゴ ST Microelectronics ロゴ 




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M74HC257 Datasheet, M74HC257 PDF,ピン配置, 機能
M74HC257
QUAD 2 CHANNEL MULTIPLEXER (3-STATE)
s HIGH SPEED :
tPD = 11 ns (TYP.) at VCC = 6V
s LOW POWER DISSIPATION:
ICC =4µA(MAX.) at TA=25°C
s HIGH NOISE IMMUNITY:
)VNIH = VNIL = 28 % VCC (MIN.)
t(ss SYMMETRICAL OUTPUT IMPEDANCE:
c|IOH| = IOL = 6mA (MIN)
us BALANCED PROPAGATION DELAYS:
dtPLH tPHL
ros WIDE OPERATING VOLTAGE RANGE:
PVCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
te74 SERIES 257
oleDESCRIPTION
sThe M74HC257 is an high speed CMOS QUAD 2
bCHANNEL MULTIPLEXER (3-STATE) fabricated
Owith silicon gate C2MOS technology.
-This IC is composed of an independent 2-channel
t(s)multiplexer with common SELECT and ENABLE
(OE) input.
cThe M74HC257 is a non-inverting multiplexer.
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
M74HC257B1R
M74HC257M1R
T&R
M74HC257RM13TR
M74HC257TTR
When the ENABLE input is held "High", outputs of
the IC become in a High-Impedance state. If
SELECT input is held low, "A" data is selected,
when SELECT is high , "B" data is chosen.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
Obsolete ProduPIN CONNECTION AND IEC LOGIC SYMBOLS
August 2001
1/11

1 Page





M74HC257 pdf, ピン配列
M74HC257
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
VCC Supply Voltage
-0.5 to +7
V
VI DC Input Voltage
-0.5 to VCC + 0.5
V
VO DC Output Voltage
-0.5 to VCC + 0.5
V
IIK DC Input Diode Current
± 20
mA
IOK DC Output Diode Current
± 20
mA
IO DC Output Current
± 35
mA
ICC or IGND DC VCC or Ground Current
± 70
mA
PD Power Dissipation
500(*)
mW
)Tstg Storage Temperature
-65 to +150
°C
t(sTL Lead Temperature (10 sec)
300 °C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
cnot implied
u(*) 500mW at 65 °C; derate to 300mW by 10mW/°C from 65°C to 85°C
rodRECOMMENDED OPERATING CONDITIONS
PSymbol
leteVCC
oVI
sVO
bTop
Obsolete Product(s) - Otr, tf
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Rise and Fall Time
Parameter
VCC = 2.0V
VCC = 4.5V
VCC = 6.0V
Value
2 to 6
0 to VCC
0 to VCC
-55 to 125
0 to 1000
0 to 500
0 to 400
Unit
V
V
V
°C
ns
ns
ns
3/11


3Pages


M74HC257 電子部品, 半導体
M74HC257
TEST CIRCUIT
uct(s)TEST
rodtPLH, tPHL
PtPZL, tPLZ
tetPZH, tPHZ
leCL = 50pF/150pF or equivalent (includes jig and probe capacitance)
R1 = 1Kor equivalent
oRT = ZOUT of pulse generator (typically 50)
Obsolete Product(s) - ObsWAVEFORM 1: PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
SWITCH
Open
VCC
GND
6/11

6 Page



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共有リンク

Link :


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