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74HCT7273D
Octal D-type flip-flop with reset; positive edge-trigger; open drain outputs
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
FEATURES ESD protection:
HBM EIA/JESD22-A114-A
Exceeds 2000V EIA/JESD22-A115-A
Exceeds 200V Ideal buffer for MOS
microprocessor or memory Eight positive edge-triggered
D-type flip-flops Common clock and master reset Output capability: standard (open
drain) ICC category: MSI.
DESCRIPTIONThe 74HCT7273 is a high-speed SI-gate CMOS device and is pin compatible
with Low power Schottky TTL (LSTTL). It is specified in compliance with
JEDEC standard no 7A.
The 74HCT7273 has eight edge-triggered D-type flip-flops with individual D
inputs andQ outputs. The common Clock (CP) and Master Reset (MR) inputs
load and reset (clear) all flip-flops simultaneously.
The state of each D input, one set-up time before the LOW-to-HIGH clock
transition, is transferred to the corresponding output (Qn) of the flip-flop.
ALOW level ontheMR inputforcesall outputs LOW, independentlyof the clock
or data inputs.
The device is useful for applications requiring true outputs only and clock and
master reset inputs that are common to all storage elements.
The 74HCT7273 has open-drain N-outputs, which are clamped by a diode
connectedto VCC. Whena HIGHis clockedin the flip-flop, the output comesin
the high-impedance OFF-state. The output may now be pulled to any voltage
between GND and VOmax. This allows the devicetobe used asa LOW-to-HIGH
or HIGH-to-LOW level shifter. For digital operation and OR-tied output
applications, the device must havea pull-up resistorto establisha logic HIGH
level.
QUICK REFERENCE DATAGround=0 V; Tamb =25 °C; tr =tf= 6.0 ns.
Notes CPD is used to determine the dynamic power dissipation (PDin μW). =CPD× VCC2×fi+∑ (CL× VCC2× fo)+ ∑(V02 /RL)× duty factor LOW where:= input frequency in MHz;= output frequency in MHz; (CL× VCC2×fo)= sum of outputs;= output load capacitance in pF;= pull-up resistor in MΩ;
VCC= supply voltage in Volts. The condition is VI= GND to VCC− 1.5V.
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
FUNCTION TABLESee note1.
Note H= HIGH voltage level;= HIGH voltage level one set-up time prior to the LOW-to-HIGH CP transition;= LOW voltage level.= LOW voltage level one set-up time prior to the LOW-to-HIGH CP transition;= high-impedance OFF-state;= don’t care;= LOW-to-HIGH CP transition.
ORDERING INFORMATION
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
PINNING
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
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Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
RECOMMENDED OPERATING CONDITIONS
LIMITING VALUESIn accordance with the Absolute Maximum Rating System (IEC 134); voltages are referenced to GND (ground=0V).
Note For DIP package: above 70 °C the value of PD derates linearly with 12 mW/K. For SO package: above 70 °C the value of PD derates linearly with 8 mW/K.
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
DC CHARACTERISTICSOver recommended operating conditions; voltages are referenced to GND (ground=0V).
Note The valueoff additional quiescent supply current (ΔICC)fora unit loadof1is givenin the specifications.To determine
ΔICC per input, multiply this value by the unit load coefficient shown in Table1.
Table 1
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
AC CHARACTERISTICSGround=0 V; tr =tf≤ 6.0 ns; CL =50pF.
Philips Semiconductors Product specification
Octal D-type flip-flop with reset; positive
edge-trigger; open drain outputs 74HCT7273
AC WAVEFORMS
