Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74LVC1G79
CMOS IC
SINGLE
POSITIVE-EDGE-TRIGGERED
D-TYPE FLIP-FLOP

DESCRIPTION
The U74LVC1G79 is a single positive-edge-triggered D-type
flip-flop.
When data at the data input (D) meets the set-up time
requirements, the data is transferred to the outputs (Q) on the
positive-going edge of the clock pulse. Following the hold-time
interval, data at the D input can be changed without affecting the
level at the outputs.
This device has power-down protective circuit, preventing device
destruction when it is powered down.

FEATURES
* Operate from 1.65V to 5.5V
* Inputs accept voltages to 5.5V
* Ioff supports partial-power-down mode
* Low power dissipation: ICC=10μA (Max.)
* ±24mA output drive(VCC=3.3V)

ORDERING INFORMATION
Ordering Number
U74LVC1G79G-AE5-R
U74LVC1G79G-AL5-R

Package
SOT-23-5
SOT-353
Packing
Tape Reel
Tape Reel
MARKING
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CMOS IC

PIN CONFIGURATION

FUNCTION TABLE (EACH GATE)
INPUT
CLK
D
OUTPUT
Q
↑
↑
H
H
L
L
L
X
Q0
Note: H: HIGH voltage level; L: LOW voltage level; X: Don’t care; ↑: Low to High CLK transition
Q0: indicates the state of referenced input, one set-up time prior to the LOW-to-HIGH CLK transition

LOGIC DIAGRAM (positive logic)
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
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VCC
VIN
Supply Voltage
Input Voltage
RATINGS
-0.5 ~ +6.5
-0.5 ~ +6.5
-0.5 ~ VCC+0.5
UNIT
V
V
V
Output in the high or low state
VOUT
Output in the high-impedance or
-0.5 ~ +6.5
V
power-off state
VCC or GND Current
ICC
±100
mA
Continuous Output Current (VOUT=0 ~ VCC)
IOUT
±50
mA
Input Clamp Current (VIN<0)
IIK
-50
mA
Output Clamp Current (VOUT<0 )
IOK
-50
mA
Storage Temperature Range
TSTG
-65 ~ +150
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
Output Voltage

RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
Supply Voltage
VCC
Input Voltage
Output Voltage
VIN
VOUT
High-Level Input Voltage
VIH
Low-Level Input Voltage
VIL
High-level Output Current
IOH
Low-level Output Current
IOL
Input Transition Rise or Fall
Rate
∆t/∆v
Operating Temperature
TEST CONDITIONS
Operating
Data retention only
VCC=1.65V~1.95V
VCC=2.3V~2.7V
VCC=3.0V~3.6V
VCC=4.5V~5.5V
VCC=1.65V~1.95V
VCC=2.3V~2.7V
VCC=3.0V~3.6V
VCC=4.5V~5.5V
VCC=1.65V
VCC=2.3V
VCC=3.0V
VCC=3.0V
VCC=4.5V
VCC=1.65V
VCC=2.3V
VCC=3.0V
VCC=3.0V
VCC=4.5V
VCC=1.65V~1.95V, 2.3V~2.7V
VCC=3.0V~3.6V
VCC=4.5V~5.5V
TA
UNISONIC TECHNOLOGIES CO., LTD
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MIN
1.65
1.5
0
0
0.65×VCC
TYP
MAX
5.5
UNIT
V
V
V
V
5.5
VCC
1.7
2
0.7×VCC
V
0.35×VCC
0.7
0.8
0.3×VCC
-40
-4
-8
-16
-24
-32
4
8
16
24
32
20
10
5
85
V
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
ns/V
ns/V
ns/V
°C
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CMOS IC
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
High-Level Output Voltage
Low-Level Output Voltage
Input Leakage Current
Power OFF Leakage Current
Quiescent Supply Current
SYMBOL
VOH
VOL
II(LEAK)
IOFF
IQ
Additional Quiescent Supply
Current
IQ
Input Capacitance
CIN

TEST CONDITIONS
VCC=1.65V~5.5V, IOH=-100μA
VCC=1.65V, IOH=-4mA
VCC=2.3V, IOH=-8mA
VCC=3.0V, IOH=-16mA
VCC=3.0V, IOH=-24mA
VCC=4.5V, IOH=-32mA
VCC=1.65V~5.5V, IOH=-100μA
VCC=1.65V, IOH=4mA
VCC=2.3V, IOH=8mA
VCC=3.0V, IOH=16mA
VCC=3.0V, IOH=24mA
VCC=4.5V, IOH=32mA
VCC=0V~5.5V, VIN=5.5V or GND
VCC=0V, VIN or VOUT=5.5V
VCC=1.65V ~ 5.5V, VIN=5.5V or
GND, IOUT=0
VCC =3V~5.5V, One input at
VCC-0.6V, other inputs at VCC or
GND
VCC=3.3V, VIN=VCC or GND
MIN
VCC-0.1
1.2
1.9
2.4
2.3
3.8
TYP
MAX
UNIT
V
0.1
0.45
0.3
0.4
0.55
0.55
±10
±10
μA
μA
10
μA
500
μA
4
V
pF
DYNAMIC CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
fclock Clock frequency
Pulse duration
Setup time before CLK ↑
Hold time ,data after CLK ↑
SYMBOL
tw
tsu
th
Conditions
VCC=1.8V±0.15V
VCC=2.5V±0.2V
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=1.8V±0.15V
VCC=2.5V±0.2V
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=1.8V±0.15V
VCC=2.5V±0.2V
VCC=3.3V±0.3V
VCC=5V±0.5V
VCC=1.8V±0.15V,
VCC=2.5V±0.2V
VCC=3.3V±0.3V
VCC=5V±0.5V
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Data in high
Data in low
MIN
2.5
2.5
2.5
2.5
2.2
1.4
1.3
1.2
2.6
1.4
1.3
1.2
0.3
0.4
1
0.5
TYP
MAX
160
UNIT
MHZ
ns
ns
ns
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CMOS IC
SWITCHING CHARACTERISTIC (Input: tR, tF≤2.5ns; PRR≤1MHz)
See Fig. 1 and Fig. 2 for test circuit and waveforms.
PARAMETER
SYMBOL
TEST CONDITIONS
Maximum clock pulse frequency
fMAX
VCC =1.65V~5.5V
VCC =1.65V~1.95V,CL=15pF
Propagation delay from input
VCC =2.3V~2.7V,CL=15pF
tPLH/tPHL
(CLK) to output(Q)
VCC =3.0V~3.6V,CL=15pF
VCC =4.5V~5.5V,CL=15pF
VCC =1.65V~1.95V,CL=30pF
Propagation delay from input
VCC =2.3V~2.7V,CL=30pF
tPLH/tPHL
(CLK) to output(Q)
VCC =3.0V~3.6V,CL=50pF
VCC =4.5V~5.5V,CL=50pF

MIN
160
2.5
1.2
1.0
0.8
3.9
2.0
1.7
1.0
TYP
MAX
9.1
6.0
4.0
3.8
9.9
7.0
5.0
4.5
UNIT
MHz
ns
ns
OPERATING CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
Cpd
VCC=3.3V, f=10MHz
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MIN
TYP
27
MAX
UNIT
pF
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
From Output
CL
RL
TEST CIRCUIT
Fig.1 Load circuitry for switching times.
VCC
VIN
tR,/tF
VM
1.8V±0.15V
VCC
≤2ns
VCC/2
2.5V±0.2V
VCC
≤2ns
VCC/2
3.3V±0.3V
3V
≤2.5ns
1.5V
5V±0.5V
VCC
≤2.5ns
VCC/2
CL
15pF
30pF
15pF
30pF
15pF
50pF
15pF
50pF
RL
1MΩ
1KΩ
1MΩ
500Ω
1MΩ
500Ω
1MΩ
500Ω
Fig. 2 Propagation delay from input to output and input voltage waveforms.
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤10MHz, Zo = 50Ω.
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CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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