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74LVQ574MSTN/a187avaiOCTAL D-TYPE FLIP FLOP WITH 3-STATE OUTPUT NON INVERTING
74LVQ574MTRSTN/a1000avaiOCTAL D-TYPE FLIP FLOP WITH 3-STATE OUTPUT NON INVERTING
74LVQ574MTRSTMN/a2000avaiOCTAL D-TYPE FLIP FLOP WITH 3-STATE OUTPUT NON INVERTING


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74LVQ574M-74LVQ574MTR
OCTAL D-TYPE FLIP FLOP WITH 3-STATE OUTPUT NON INVERTING
1/10July 2001 HIGH SPEED:
fMAX = 180 MHz (TYP .) at VCC = 3.3V COMPATIBLE WITH TTL OUTPUTS LOW POWER DISSIPATION:CC = 4 μA (MAX.) at TA =25°C LOW NOISE:
VOLP = 0.5V (TYP .) at VCC = 3.3V 75Ω TRANSMISSION LINE DRIVING
CAPABILITY SYMMETRICAL OUTPUT IMPEDANCE:OH| = IOL = 12mA (MIN) at VCC = 3.0V PCI BUS LEVELS GUARANTEED AT 24 mA BALANCED PROPAGATION DELAYS:
tPLH ≅ tPHL OPERATING VOLTAGE RANGE:
VCC(OPR) = 2V to 3.6V (1.2V Data Retention) PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 574 IMPROVED LATCH-UP IMMUNITY
DESCRIPTION

The 74LVQ574 is a low voltage CMOS OCTAL
D-TYPE FLIP-FLOP with 3 STATE OUTPUTS
NON INVERTING fabricated with sub-micron
silicon gate and double-layer metal wiring C2 MOS
technology. It is ideal for low power and low noise
3.3V applications.
These 8 bit D-Type Flip-Flops are controlled by a
clock input (CK) and an output enable input (OE).
On the positive transition of the clock, the Q
outputs will be set to the logic that were setup at
the D inputs. While the (OE) input is low, the 8
outputs will be in a normal logic state (high or low
logic level) and while high level the outputs will be
in a high impedance state.
The output control does not affect the internal
operation of flip-flops; that is, the old data can be
retained or the new data can be entered even
while the outputs are off. In order to enhance PC
board layout, the 74LVQ574 offers a pinout having
inputs and outputs on opposite side of the
package. All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
74LVQ574

OCTAL D-TYPE FLIP FLOP
WITH 3 STATE OUTPUTS NON INVERTING
PIN CONNECTION AND IEC LOGIC SYMBOLS
ORDER CODES
74LVQ574
2/10
INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION
TRUTH TABLE

X : Don’t Care
Z : High Impedance
LOGIC DIAGRAM
74LVQ574
3/10
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) Truth Table guaranteed: 1.2V to 3.6V
2) VIN from 0.8V to 2V
74LVQ574
4/10
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 75Ω
DYNAMIC SWITCHING CHARACTERISTICS

1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (VILD), 0V to threshold
(VIHD), f=1MHz.
74LVQ574
5/10
AC ELECTRICAL CHARACTERISTICS (C
L = 50 pF, RL = 500 Ω, Input tr = tf = 3ns)
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW (tOSLH = |tPLHm - tPLHn|, tOSHL = |tPHLm - tPHLn|)
2) Parameter guaranteed by design
(*) Voltage range is 3.3V ± 0.3V
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/8 (per Flip
Flop)
74LVQ574
6/10
TEST CIRCUIT

CL = 50pF or equivalent (includes jig and probe capacitance)
RL = R1 = 500Ω or equivalent
RT = ZOUT of pulse generator (typically 50Ω)
WAVEFORM 1 : PROPAGATION DELAYS, SETUP AND HOLD TIMES (f=1MHz; 50% duty cycle)
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