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Toshiba Electronic Components Datasheet

TC74HC148AF Datasheet

8-to-3 Line Priority Encoder

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TC74HC148AP/AF
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC148AP, TC74HC148AF
8-to-3 Line Priority Encoder
The TC74HC148A is a high speed CMOS 8-to-3 LINE
ENCODER fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
All data inputs and outputs of these encoders are active at the
low logic level.
The encoder detects a low level of the highest order among
eight input signals and outputs the corresponding signal position
in binaly code.
Enable Input EI and Enable Output EO are used to easily
cascade without using external circuits.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features
High speed: tpd = 15 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: 10 LSTTL loads
Symmetrical output impedance: |IOH| = IOL = 4 mA (min)
Balanced propagation delays: tpLH ∼− tpHL
Wide operating voltage range: VCC (opr) = 2 to 6 V
Pin and function compatible with 74LS148
Pin Assignment
TC74HC148AP
TC74HC148AF
Weight
DIP16-P-300-2.54A
SOP16-P-300-1.27A
: 1.00 g (typ.)
: 0.18 g (typ.)
Start of commercial production
1988-11
1
2014-03-01


Toshiba Electronic Components Datasheet

TC74HC148AF Datasheet

8-to-3 Line Priority Encoder

No Preview Available !

IEC Logic Symbol
TC74HC148AP/AF
Truth Table
Inputs
Outputs
E1
0
1
2
3
4
5
6
7
A2 A1 A0 GS EO
H
X
X
X
X
X
X
X
X
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
X
X
X
X
X
X
X
L
L
L
L
L
H
L
X
X
X
X
X
X
L
H
L
L
H
L
H
L
X
X
X
X
X
L
H
H
L
H
L
L
H
L
X
X
X
X
L
H
H
H
L
H
H
L
H
L
X
X
X
L
H
H
H
H
H
L
L
L
H
L
X
X
L
H
H
H
H
H
H
L
H
L
H
L
X
L
H
H
H
H
H
H
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
H
L
H
X: Don’t care
2
2014-03-01


Part Number TC74HC148AF
Description 8-to-3 Line Priority Encoder
Maker Toshiba
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TC74HC148AF Datasheet PDF






Similar Datasheet

1 TC74HC148AF 8-to-3 Line Priority Encoder
Toshiba
2 TC74HC148AP 8-to-3 Line Priority Encoder
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