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74HC139N-74HC139PW
74HC/HCT139; Dual 2-to-4 line decoder/demultiplexer
Philips Semiconductors Product specification
Dual 2-to-4 line decoder/demultiplexer 74HC/HCT139
FEATURES Demultiplexing capability Two independent 2-to-4 decoders Multifunction capability Active LOW mutually exclusive outputs Output capability: standard ICC category: MSI
GENERAL DESCRIPTIONThe 74HC/HCT139 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). It is specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT139 are high-speed, dual 2-to-4 line
decoder/multiplexers. This device has two independent
decoders, each accepting two binary weighted inputs
(nA0 and nA1) and providing four mutually exclusive active
LOW outputs (nY0 to nY3). Each decoder has an active
LOW enable input (nE).
When nE is HIGH, every output is forced HIGH. The
enable can be used as the data input for a 1-to-4
demultiplexer application.
The “139” is identical to the HEF4556 of the HE4000B
family.
QUICK REFERENCE DATAGND = 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
APPLICATIONS Memory decoding or data-routing Code conversion
Philips Semiconductors Product specification
Dual 2-to-4 line decoder/demultiplexer 74HC/HCT139
PIN DESCRIPTION
Philips Semiconductors Product specification
Dual 2-to-4 line decoder/demultiplexer 74HC/HCT139
FUNCTION TABLE
Notes H = HIGH voltage level
L = LOW voltage level
X = don’t care
Philips Semiconductors Product specification
Dual 2-to-4 line decoder/demultiplexer 74HC/HCT139
DC CHARACTERISTICS FOR 74HCFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HCGND = 0 V; tr = tf = 6 ns; CL = 50 pF
Philips Semiconductors Product specification
Dual 2-to-4 line decoder/demultiplexer 74HC/HCT139
DC CHARACTERISTICS FOR HCTFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT typesThe value of additional quiescent supply current (ΔICC) for a unit load of 1 is given in the family specifications.
To determine ΔICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCTGND = 0 V; tf = tf = 6 ns; CL = 50 pF
