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74AHCT273PW Datenblatt(PDF) 2 Page - NXP Semiconductors

Teilenummer 74AHCT273PW
Bauteilbeschribung  Octal D-type flip-flop with reset; positive-edge trigger
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Hersteller  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74AHCT273PW Datenblatt(HTML) 2 Page - NXP Semiconductors

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1999 Sep 01
2
Philips Semiconductors
Product specification
Octal D-type flip-flop with reset;
positive-edge trigger
74AHC273; 74AHCT273
FEATURES
• Ideal buffer for MOS microcontroller or memory
• Common clock and master reset
• ESD protection:
HBM EIA/JESD22-A114-A exceeds 2000 V
MM EIA/JESD22-A115-A exceeds 200 V
CDM EIA/JESD22-C101 exceeds 1000 V
• Balanced propagation delays
• All inputs have Schmitt trigger actions
• Inputs accepts voltages higher than VCC
• See ‘377’ for clock enable version
• See ‘373’ for transparent latch version
• See ‘374’ for 3-state version
• For AHC only: operates with CMOS input levels
• For AHCT only: operates with TTL input levels
• Specified from −40 to +85 °C and −40 to +125 °C.
DESCRIPTION
The 74AHC/AHCT273 are high-speed Si-gate CMOS
devices and are pin compatible with low power Schottky
TTL (LSTTL). They are specified in compliance with
JEDEC standard no. 7A.
The 74AHC/AHCT273 have eight edge-triggered, D-type
flip-flops with individual D inputs and Q 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.
All outputs will be forced LOW independently of clock or
data inputs by a LOW on the MR input.
The device is useful for applications where the true output
only is required and the clock and master reset are
common to all storage elements.
QUICK REFERENCE DATA
Ground = 0 V; Tamb =25 °C; tr =tf ≤ 3.0 ns.
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW).
PD =CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
∑ (CL × VCC2 × fo) = sum of outputs;
CL = output load capacitance in pF;
VCC = supply voltage in Volts.
2. The condition is VI = GND to VCC.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
AHC
AHCT
tPHL/tPLH
propagation delay
CL = 15 pF; VCC =5V
CP to Qn
4.2
4.0
ns
MR to Qn
3.7
3.9
ns
fmax
maximum clock frequency
CL = 15 pF; VCC = 5 V
120
120
MHz
CI
input capacitance
VI =VCC or GND
3.0
3.0
pF
CO
output capacitance
4.0
4.0
pF
CPD
power dissipation
capacitance
CL = 50 pF; f = 1 MHz;
notes 1 and 2
14.0
18.0
pF


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