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Partno	Mfg	Dc	Qty	Available	Descript
74HC147D	PHILIPS	N/a	1066	avai	74HC/HCT147; 10-to-4 line priority encoder
74HC147N	PHILIPS	N/a	28	avai	10-to-4 line priority encoder
74HCT147D	PHI	N/a	20000	avai	74HC/HCT147; 10-to-4 line priority encoder
74HCT147N	PHILIPS	N/a	8	avai	74HC/HCT147; 10-to-4 line priority encoder

74HCT147D ,74HC/HCT147; 10-to-4 line priority encoderINTEGRATED CIRCUITSDATA SHEETFor a complete data sheet, please also download:• The IC06 74HC/HCT/HC ..
74HCT147N ,74HC/HCT147; 10-to-4 line priority encoderINTEGRATED CIRCUITSDATA SHEETFor a complete data sheet, please also download:• The IC06 74HC/HCT/HC ..
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74HC147D-74HC147N-74HCT147D-74HCT147N
74HC/HCT147; 10-to-4 line priority encoder

Philips Semiconductors Product speciﬁcation
10-to-4 line priority encoder 74HC/HCT147
FEATURES Encodes 10-line decimal to 4-line BCD Useful for 10-position switch encoding Used in code converters and generators Output capability: standard ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT147 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT147 9-input priority encoders accept data
from nine active LOW inputs (A0to A8) and provide a
binary representation on the four active LOW outputs
(Y0to Y3). A priority is assigned to each input so that when
two or more inputs are simultaneously active, the input
with the highest priority is represented on the output, with
input lineA8 having the highest priority.
The devices provide the 10-line to 4-line priority encoding
function by use of the implied decimal “zero”. The “zero” is
encoded when all nine data inputs are HIGH, forcing all
four outputs HIGH.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
Notes CPD is used to determine the dynamic power dissipation (PDin μW): = CPD× VCC2×fi +∑ (CL× VCC2×fo) where: = input frequency in MHz = output frequency in MHz (CL× VCC2×fo) = sum of outputs= output load capacitance in pF
VCC= supply voltage in V For HC the condition is VI= GND to VCC
For HCT the condition is VI= GND to VCC− 1.5 V
ORDERING INFORMATION
See “74HC/HCT/HCU/HCMOS Logic Package Information”.
Philips Semiconductors Product speciﬁcation
10-to-4 line priority encoder 74HC/HCT147
PIN DESCRIPTION
Philips Semiconductors Product speciﬁcation
10-to-4 line priority encoder 74HC/HCT147
FUNCTION TABLE
Notes H= HIGH voltage level= LOW voltage level= don’t care
Philips Semiconductors Product speciﬁcation
10-to-4 line priority encoder 74HC/HCT147
Philips Semiconductors Product speciﬁcation
10-to-4 line priority encoder 74HC/HCT147
DC CHARACTERISTICS FOR 74HC
For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HC
GND = 0 V; tr = tf = 6 ns; CL = 50 pF

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