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Toshiba Electronic Components Datasheet

TC74HC257AF Datasheet

QUAD 2-CHANEL MULTIPLEXER (3-STATE)

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TC74HC257AP/AF
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC257AP, TC74HC257AF
Quad 2-Channel Multiplexer (3-state)
The TC74HC257A is high speed CMOS MULTIPLEXER
fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
It is composed of four independent 2-channel multiplexers with
common SELECT and OUTPUT ENABLE ( OE ).
If OE is set low, the outputs are held in a high-impedance
state. When SELECT is set low, Adata inputs are enabled.
Conversely, when SELECT is high, Bdata inputs are
enabled.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
High speed: tpd = 10 ns (typ.) at VCC = 5 V
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
High noise immunity: VNIH = VNIL = 28% VCC (min)
Output drive capability: 15 LSTTL loads
Symmetrical output impedance: |IOH| = IOL = 6 mA (min)
Balanced propagation delays: tpLH ∼− tpHL
Wide operating voltage range: VCC (opr) = 2 to 6 V
Pin and function compatible with 74LS257
Pin Assignment
TC74HC257AP
TC74HC257AF
Weight
DIP16-P-300-2.54A
SOP16-P-300-1.27A
: 1.00 g (typ.)
: 0.18 g (typ.)
Start of commercial production
1986-11
1 2014-03-01


Toshiba Electronic Components Datasheet

TC74HC257AF Datasheet

QUAD 2-CHANEL MULTIPLEXER (3-STATE)

No Preview Available !

IEC Logic Symbol
TC74HC257AP/AF
Truth Table
Inputs
OE SELECT A
HXX
LLL
L LH
LHX
LHX
X: Don’t care
Z: High impedance
Output
BY
XZ
XL
XH
LL
HH
Absolute Maximum Ratings (Note 1)
Characteristics
Symbol
Rating
Unit
Supply voltage range
DC input voltage
DC output voltage
Input diode current
Output diode current
DC output current
DC VCC/ground current
Power dissipation
Storage temperature
VCC
VIN
VOUT
IIK
IOK
IOUT
ICC
PD
Tstg
0.5 to 7
0.5 to VCC + 0.5
0.5 to VCC + 0.5
±20
±20
±35
±75
500 (DIP) (Note 2)/180 (SOP)
65 to 150
V
V
V
mA
mA
mA
mA
mW
°C
Note 1:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Note 2: 500 mW in the range of Ta = −40 to 65°C. From Ta = 65 to 85°C a derating factor of 10 mW/°C shall be
applied until 300 mW.
2 2014-03-01


Part Number TC74HC257AF
Description QUAD 2-CHANEL MULTIPLEXER (3-STATE)
Maker Toshiba
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TC74HC257AF Datasheet PDF






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1 TC74HC257AF QUAD 2-CHANEL MULTIPLEXER (3-STATE)
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2 TC74HC257AP QUAD 2-CHANEL MULTIPLEXER (3-STATE)
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