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74ACT273MOTOROLAN/a38avaiOctal D-Type Flip-Flop


74ACT273 ,Octal D-Type Flip-Floplogic diagram has not be used to estimate propagation delays2/1174ACT273
74ACT273M ,OCTAL D-TYPE FLIP FLOP WITH CLEARABSOLUTE MAXIMUM RATINGS Symbol Parameter Value UnitV Supply Voltage-0.5 to +7 VCCV DC Input V ..
74ACT273MTC ,Octal D-Type Flip-Flopapplications where the true output onlyis required and the Clock and Master Reset are common toall ..
74ACT273MTCX ,Octal D-Type Flip-FlopFeaturesThe AC273 and ACT273 have eight edge-triggered D-type

74ACT273
Octal D-Type Flip-Flop
1/11April 2001 HIGH SPEED:
fMAX = 190MHz (TYP.) at VCC = 5V LOW POWER DISSIPATION:CC = 4 μA (MAX.) at TA =25°C COMPATIBLE WITH TTL OUTPUTSIH = 2V (MIN.), VIL = 0.8V (MAX.) 50Ω TRANSMISSION LINE DRIVING
CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 24mA (MIN) BALANCED PROPAGATION DELAYS: PLH ≅ t PHL OPERATING VOLTAGE RANGE:CC (OPR) = 4.5V to 5.5V PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 273 IMPROVED LATCH-UP IMMUNITY
DESCRIPTION

The 74ACT273 is an advanced high-speed CMOS
OCTAL D-TYPE FLIP FLOP WITH CLEAR
fabricated with sub-micron silicon gate and
double-layer metal wiring C2 MOS technology.
Information signals applied to D inputs are
transfered to the Q output on the positive-going
edge of the clock pulse.
When the CLEAR input is held low, the Q outputs
are held low independentely of the other inputs.
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.
74ACT273

OCTAL D-TYPE FLIP FLOP WITH CLEAR
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
74ACT273
2/11
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE

X : Don’t Care
LOGIC DIAGRAM

This logic diagram has not be used to estimate propagation delays
74ACT273
3/11
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
74ACT273
4/11
DC SPECIFICATIONS

1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on transmission lines with impedances as low as 50Ω
AC ELECTRICAL CHARACTERISTICS (C
L = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
(*) Voltage range is 5.0V ± 0.5V
74ACT273
5/11
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)
74ACT273
6/11
WAVEFORM 1: PROPAGATION DELAYS, SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)
WAVEFORM 2: PROPAGATION DELAYS (f=1MHz; 50% duty cycle)
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