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PDF 74AC161 Data sheet ( Hoja de datos )
| Número de pieza | 74AC161 | |
| Descripción | SYNCHRONOUS PRESETTABLE 4-BIT COUNTER | |
| Fabricantes | STMicroelectronics | |
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74AC158
QUAD 2 CHANNEL MULTIPLEXER (INV.)
s HIGH SPEED: tPD = 4 ns (TYP.) at VCC = 5V
s LOW POWER DISSIPATION:
ICC = 8 µA (MAX.) at TA = 25 oC
s HIGH NOISE IMMUNITY:
VNIH = VNIL = 28% VCC (MIN.)
s 50Ω TRANSMISSION LINE DRIVING
CAPABILITY
s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24 mA (MIN)
s BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL
s OPERATING VOLTAGE RANGE:
VCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 158
s IMPROVED LATCH-UP IMMUNITY
DESCRIPTION
The AC158 is an high-speed CMOS QUAD
2-CHANNEL MULTIPLEXER (INVERTING)
fabricated with sub-micron silicon gate and
double-layer metal wiring C2MOS technology. It is
ideal for low power applications maintaining high
speed operation similar to equivalent Bipolar
Schottky TTL.
PRELIMINARY DATA
BM
(Plastic Package)
(Micro Package)
ORDER CODES :
74AC158B
74AC158M
It consists of four 2-input digital multiplexers with
common select and strobe inputs. It is an
inverting multiplexer. When the STROBE input is
held high selection of data is inhibit and all the
outputs become high. The SELECT decoding
determines whether the A or B inputs get routed
to their corresponding Y outputs.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
PIN CONNECTION AND IEC LOGIC SYMBOLS
May 1997
1/9
1 page  
74AC158
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf =3 ns)
Symbol
P ar ame te r
tPLH Propagation Delay Time
tPHL SELECT to Y
tPLH Propagation Delay Time
tPHL STROBE to Y
tPLH Propagation Delay Time
tPHL A, B to Y
(*) Voltage range is 3.3V ± 0.3V
(**) Voltage range is 5V ± 0.5V
Test Condition
V CC
(V)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
3.3(*)
5.0(**)
Value
TA = 25 oC
-40 to 85 oC
Min. Typ. Max. Min. Max.
1.5 7.0 11.5 1.5 12.5
1.5 5.0 9.0 1.5 10.0
1.5 7.0 11.0 1.5 12.0
1.5 5.5 8.5 1.5 9.5
1.5 5.0 8.0 1.5 8.5
1.5 4.0 7.0 1.5 7.5
Unit
ns
ns
ns
CAPACITIVE CHARACTERISTICS
Symbol
P ar ame te r
Test Conditions
V CC
(V)
Value
TA = 25 oC
-40 to 85 oC
Min. Typ. Max. Min. Max.
Unit
CIN Input Capacitance
5.0
4 pF
CPD Power Dissipation
Capacitance (note 1)
5.0
TBD pF
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to
Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN + ICC/n (per circuit)
TEST CIRCUIT
5/9
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| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet 74AC161.PDF ] | |
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