74HC257 Fast Delivery |IC PHOENIX CO.,LIMITED

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74HC257
Quad 2-Input Data Selector/Multiplexer with 3-State Outputs
TOSHIBA
TC74HC257AP/AF/AFN
TOSHIBA CMOS DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC
TC74HC257AP, TC74HC257AF, TC74HC257AFN
QUAD 2 - CHANNEL MULTIPLEXER (3 - STATE)
(Note) The JEDEC SOP (FN) is not available in
Japan.
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 OUTPUTENABLE (tE).
If ttE is set low, the outputs are held in a high-impedance
state. When SELECT is set 1ow,"A"data inputs are enabled.
Conversely, when SELECT is high, "B" data inputs are
enabled.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
FEATURES:
. High Speed .................................... tpd = 10ns(typ.) at Vcc = 5V
q Low Power Dissipation ................ ICC =4PA(Max.) at Ta =25°C
q High Noise Immunity .................. VNIH =VNIL=28°/o Vcc (Min.)
. Output Drive Capability ............. 15 LSTTL Loads
. Symmetrical Output Impedance-l IOH l = IOL-- 6mA(Min.)
q Balanced Propagation Delays ..... tpLHztpHL
. Wide Operating Voltage Range-. Vcc (opr.) = 2W- 6V
o Pin and Function Compatible with 74LS257
P (DlP16-P-300-2.54A)
Weight : 1.00g (Typ.)
16 .4” V
16 (A _riic'i;
Virgin; 13:35
F(SOP16-P-300-1.27) FN (SOL16-P-150-1.27)
Weight : 0.18g (Typ.) Weight : 0.13g (Typ.)
PIN ASSIGNMENT
SELECT 1 E V Cl 16 Vcc
1A 2 E Cl 15 to-E
13 3 E Cl 14 4A
1Y4 E Clos 43
2A 5 E Cl 12 4Y
23 6 E Cl 11 3A
2Y 7 E 310 33
GND 8 E Cl 9 3Y
(TOP VIEW)
TRUTH TABLE
IEC LOGIC SYMBOL
INPUTS OUTPUT E (15)
OE SELECT B Y SELECT (1)
H X X X 2
L L L X L 1A
L L H x H IB ly
L H X L L 2B 2Y
L H X H H 3A 3Y
X : Don't Care 2: (12)
Z : High Impedance 4B 4Y
1 2001-05-17
TOSHIBA
TC74HC257AP/AF/AFN
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL VALUE UNIT *500mW in the range of Ta--
Supply Voltage Range Vcc -0.5--7 V -40°C~65°C.From Ta=65°C
- -- to 85 °C a derating factor of
DC Input Voltage vIN 0.5 vcc+0.5 v _10mW/°C shall be applied
DC Output Voltage VOUT _0.5~Vcc+0.5 V until 300mW.
Input Diode Current I,K -+20 mA
Output Diode Current G: :20 mA
DC Output Current low -+35 mA
DC Vcc /Ground Current ICC $75 mA
Power Dissipation PD 500 (DIP)*I 180 (SOP) mW
Storage Temperature Tstg -6r-150 ''C
RECOMMENDED OPERATING CONDITIONS
PARAMETER SYMBOL VALUE UNIT
Supply Voltage Vcc 2--6 V
Input Voltage VIN 0--Vcc V
Output Voltage VOUT 0--Vcc V
Operating Temperature Topr -40-85 °C
Input Rise and Fall Time tr, tf o-- 500(Vcc=4.5V) ns
o-- 400 (Vcc=6.0V)
DC ELECTRICAL CHARACTERISTICS
T = 25°C Ta = -40-850C
PARAMETER SYMBOL TEST CONDITION Vcc a UNIT
(V) MIN. TYP. MAX. MIN. MAX.
Hi h - Level 2.0 1.50 _- 1.50
'nSutVoltage Ihr, ‘63 ll', - - ll', - V
Low - Level 2.0 _- - 0.50 _- 0.50
lnputVoltage V” (li' - 1:33 - 1:33 V
I 20 A 12(5) l,') £215) - I?, -
tet v-it/oe/ta e VOH VIN= v OH" /2 620 529 620 - 529 - v
p g 'H°r IL .loH=-5roA 4.5 4.18 4.31 - 4.13 -
Gi = - 7.8 mA 6.0 5.68 5.80 - 5.63 -
I 20 A £2115) - h'! 8'1 - (bl
t9ut,-ul-teitilta e VOL VIN: v OL- /I 620 - 020 021 - 021 v
p g IH or IL IOL=6mA 4.5 - 0.17 0.26 - 0.33
la=7.8mA 6.0 - 0.18 0.26 - 0.33
3-State Off lhN--Ve OFVIL - - -
Leak Current loz Vour = Vcc or GND .0 i 0.5 i 5.0 A
Input Leakage Current II N lh N = Vcc or GND 6.0 - - i 0.1 - i 1.0 /2
QuiescentSupply Current ICC lh N = Vcc or GND 6.0 - - 4.0 - 40.0
2 2001-05-17
TOSHIBA TC74HC257AP/AF/AFN
AC ELECTRICAL CHARACTERISTICS( Input t, = h = 6ns)
Ta = 25°C Ta = -40-8YC
SYMBOL TESTCONDITION CL Vcc UNIT
PARAMETER (M) (V) MIN. TYP. MAX. MIN. MAX.
2.0 - 20 60 - 75
Output Transition Time tTLH 50 4.5 - 6 12 - 15
tTHL 6.0 - 5 IO - 13
so 28 - 13 l?/l, - li?
Propagation Delay Time tpLH 6.0 - 11 17 - 21
A,B-Y,Y 2.0 - 62 140 - 175
( ) “M 150 4.5 - 18 28 - 35
6.0 - 15 24 - 30
50 YI - f] l"?, - Ili',
. - 1 -
Propagation Delay Time tpLH 6.0 - 11 17 - 21 ns
SELECT-Y,'? 2.0 - 62 140 - 175
( ) “M 150 4.5 - 18 28 - 35
6.0 - 15 24 - 30
50 YI - f? 12(21 - "213
. - 1 -
3- State Output trm, 6.0 - 10 19 - 24
Enable Time RL=1kQ 2.0 - 57 150 - 190
I tpZH 150 4.5 - 17 30 - 38
6.0 - 14 26 - 33
2.0 - 28 140 - 175
i3Ii',tgttcl,uetput tPLZ RL=1kQ 50 4.5 - 14 28 - 35
na e me tpHir 6.0 - 13 24 - 30
Input Capacitance Cm - 5 10 - 10
Output Capacitance COUT - 10 - - - pF
Power Dissipation - - - -
Capacitance Cruo(1) 47
Note (1) CPD is defined as the value of the internal equivalent capacitance which is calculated from the
operating current consumption without load.
Average operating current can be obtained by the equation:
lcc (opr) = CPD . Vcc . fIN + lcc /4 (per bit)
3 2001-05-17
TOSHIBA
DIP 16PlN PACKAGE DIMENSIONS (DlN6-P-300-2.54A)
TC74HC257AP/AF/AFN
Unit in mm
Weight: 1.009 (Typ.)
0.735TYP i,'
-----. _
6.4i0.2
yr--'"-'''"'-''-'",-)
19.75MAX
19dyH0.2
.51 MIN ‘3.5i0.‘2
3.3i0.3
L 0.5fc0.1 52-415
SOP 16PIN (200mil BODY) PACKAGE DIMENSIONS (SOP16-P-300-1.27) Unit in mm
Weight : 0.18g (Typ.)
HHHHHHHH _
I H H E H H H H_-
0.705TYP -
10.8MAX
10.3i0.2
'isacatcotat),
(300mil)
0.15%?»
0.8:t0.2
TOSHIBA TC74HC257AP/AF/AFN
SOP 16PIN (150mil BODY) PACKAGE DIMENSIONS (SOL16-P-150-1.27) Unit in mm
(Note) This package is not available in Japan.
[RfiflflfififLfi _
P. cu,
or. C:
. TYP ‘
9.9i0.1 N x
- r'? r Ps = 45
taraJaaacuai=ci, I 55
E. '5. o
ci o.7:o.3
Weight : 0.13g (Typ.)
5 2001-05-17
TOSHIBA TC74HC257AP/AF/AFN
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
6 2001-05-17

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Partno	Mfg	Dc	Qty	Available	Descript
74HC257	TOSHIBA	N/a	349	avai	Quad 2-Input Data Selector/Multiplexer with 3-State Outputs