74ACT157 ,QUAD 2 CHANNEL MULTIPLEXERAbsolute Maximum Ratings are those values beyond which damage to the device may occur. Functional o ..
74ACT157M ,QUAD 2 CHANNEL MULTIPLEXER74ACT157QUAD 2 CHANNEL MULTIPLEXER ■ HIGH SPEED: t = 5.5 ns (TYP.) at V = 5VPD CC■ LOW POWER DISSI ..
74ACT157MTC ,Quad 2-Input MultiplexerFunctional Description Truth TableThe AC/ACT157 is a quad 2-input multiplexer. It selectsInputs Out ..
74ACT157MTCX ,Quad 2-Input Multiplexer74AC157 • 74ACT157 Quad 2-Input MultiplexerNovember 1988Revised November 199974AC157 74ACT157Quad ..
74ACT157MTCX ,Quad 2-Input MultiplexerFeaturesThe AC/ACT157 is a high-speed quad 2-input multiplexer.
74ACT157
QUAD 2 CHANNEL MULTIPLEXER
1/10April 2001 HIGH SPEED: tPD = 5.5 ns (TYP.) at VCC = 5V LOW POWER DISSIPATION:CC = 4μA(MAX.) at TA =25°C COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.), VIL = 0.8V (MAX.) 50Ω TRANSMISSION LINE DRIVING
CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE:OH| = IOL = 24mA (MIN) BALANCED PROPAGATION DELAYS:PLH ≅ tPHL OPERATING VOLTAGE RANGE:
VCC (OPR) = 4.5V to 5.5V
� PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 157 IMPROVED LATCH-UP IMMUNITY
DESCRIPTIONThe 74ACT157 is an advanced high-speed CMOS
QUAD 2-CHANNEL MULTIPLEXER fabricated
with sub-micron silicon gate and double-layer
metal wiring C2 MOS tecnology.
It consists of four 2-input digital multiplexer with
common SELECT and STROBE inputs. It is a
non-inverting multiplexer. When the STROBE
input is held high selection of data is inhibit and all
the outputs become low. The SELECT decoding
determines whether the A or B inputs get routed to
their corresponding Y outputs.
The device is designed to interface directly High
Speed CMOS systems with TTL, NMOS and
CMOS output voltage levels.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74ACT157QUAD 2 CHANNEL MULTIPLEXER
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
74ACT1572/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE X : Don’t Care
LOGIC DIAGRAM
74ACT1573/10
ABSOLUTE MAXIMUM RATINGS Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
RECOMMENDED OPERATING CONDITIONS 1) VIN from 0.8V to 2.0V
74ACT1574/10
DC SPECIFICATIONS 1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on trasmission lines with impedances as low as 50Ω
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
(*) Voltage range is 5.0V ± 0.5V
74ACT1575/10
CAPACITIVE CHARACTERISTICS 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 x VCC x fIN + ICC/n (per circuit)
TEST CIRCUIT CL = 50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
74ACT1576/10
WAVEFORM 1: PROPAGATION DELAYS FOR INVERTING CONDITIONS (f=1MHz; 50% duty cycle)
WAVEFORM 2: PROPAGATION DELAYS FOR NON-INVERTING CONDITIONS (f=1MHz; 50% duty cycle)
