Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHC1G79
CMOS IC
SINGLE
POSITIVE-EDGE-TRIGGERED
D-TYPE FLIP-FLOP

DESCRIPTION
The UTC U74AHC1G79 is a positive-edge-triggered D-type
flip-flop.
Information on the data input is transferred to the Q output
on the LOW-to-HIGH transition of the clock pulse. The D input
must be stable one set-up time prior to the LOW-to-HIGH clock
transition for predictable operation.

FEATURES
* Wide supply voltage range from 2.0V to 5.5V
* Symmetrical output impedance
* Balanced propagation delays
* High noise immunity

ORDERING INFORMATION
Ordering Number
U74AHC1G79G-AE5-R
U74AHC1G79G-AL5-R

Package
SOT-23-5
SOT-353
Packing
Tape Reel
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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U74AHC1G79
CMOS IC

PIN CONFIGURATION

FUNCTION TABLE (each gate)
INPUTS
CP
↑
↑
L

D
L
H
X
OUTPUT
Q
L
H
Q
LOGIC DIAGRAM (positive logic)
Logic symbol
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www.unisonic.com.tw
IEC logic symbol
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
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
Continuous VCC or GND
Current
Continuous Output Current
Input Clamp Current
Output Clamp Current
SYMBOL
VCC
VIN
VOUT
CONDITIONS
RATINGS
-0.5 ~ +7.0
-0.5 ~ +7.0
-0.5 ~ VCC +0.5
UNIT
V
V
V
±50
mA
±25
-20
mA
mA
±20
mA
ICC
IOUT
IIK
IOK
-0.5V<VOUT<VCC+0.5V
VIN< -0.5
VOUT< -0.5 or VOUT>VCC+0.5V
(Note 2)
°C
Operating Temperature
TOPR
-40 ~ + 85
Storage Temperature Range
TSTG
-65 ~ + 150
°C
Notes: 1. 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.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
Input Transition Rise or Fall
Rate

SYMBOL
VCC
VIN
VOUT
TA
∆t/∆v
TEST CONDITIONS
Operating
High or low state
MIN
2.0
0
0
-40
TYP
5.0
VCC=3.3 ± 0.3V
VCC=5.0 ± 0.5V
MAX
5.5
5.5
VCC
+85
100
20
UNIT
V
V
V
°C
ns/V
ns/V
MAX
UNIT
V
V
V
V
V
V
V
V
V
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
High-level Input Voltage
VIH
Low-level Input Voltage
VIL
High-level output voltage
(all outputs)
VOH
High-Level Output Voltage
Low-level output voltage
(all outputs)
VOL
Low-Level Output Voltage
Input Leakage Current
II(LEAK)
Quiescent Supply Current
ICC
Input Capacitance
CIN
TEST CONDITIONS
VCC=2.0V
VCC=3.0V
VCC=5.5V
VCC=2.0V
VCC=3.0V
VCC=5.5V
VCC=2.0V
VIN=VIH or VIL,
VCC=3.0V
IOH=-50μA
VCC=4.5V
VCC=3.0V, VIN=VIH or VIL,
IOH=-4.0mA
VCC=4.5V, VIN=VIH or VIL,
IOH=-8.0mA
VCC=2.0V
VIN=VIH or VIL,
VCC=3.0V
IOH=50μA
VCC=4.5V
VCC=3.0V, VIN=VIH or VIL,
IOH=4.0mA
VCC=4.5V, VIN=VIH or VIL,
IOH=8.0mA
VCC=5.5V, VIN=VCC or GND
VCC=5.5V, VIN=VCC or GND,
IOUT=0
VIN=VCC or GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
1.5
2.1
3.85
TYP
0.5
0.9
1.65
1.9
2.9
4.4
2.0
3.0
4.5
2.58
V
3.94
V
1.5
0.1
0.1
0.1
V
V
V
0.36
V
0.36
V
±0.1
μA
1.0
μA
10
pF
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
SWITCHING CHARACTERISTICS (GND=0V, tr = tf ≤ 3.0ns, TA =25°C , unless otherwise specified)
PARAMETER
maximum clock pulse
frequency
Propagation delay from input
(CP) to output (Q)

SYMBOL
fMax
TEST CONDITIONS
VCC=4.5V ~ 5.5V
CL=15pF
tPLH / tPHL
CL=50pF
MIN
TYP
MAX
90
VCC=3.0V ~ 3.6V
VCC=4.5V ~ 5.5V
VCC=3.0V ~ 3.6V
VCC=4.5V ~ 5.5V
UNIT
MHz
4.9
3.5
6.9
5.1
8.4
5.6
12
8
ns
ns
ns
ns
TYP
MAX
UNIT
TIMING REQUIREMENTS
PARAMETER
clock pulse width High or
Low
set-up time D to CP
hold time D to CP

CMOS IC
SYMBOL
TEST CONDITIONS
MIN
tw
VCC=4.5V ~ 5.5V
3.0
tsu
th
VCC=4.5V ~ 5.5V
VCC=4.5V ~ 5.5V
3.0
2.0
ns
1.0
1.0
ns
ns
OPERATING CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
Power Dissipation
Capacitance
SYMBOL
CPD
TEST CONDITIONS
CL=50pF, f=1MHz
UNISONIC TECHNOLOGIES CO., LTD
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MIN
TYP
15
MAX
UNIT
pF
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
CMOS IC
TEST CIRCUIT AND WAVEFORMS
From Output
(Note) CL
VIN INPUT
GND to VCC
GND to 3.0V
VM INPUT
50% VCC
1.5V
VM OUTPUT
50% VCC
50% VCC
Notes: 1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤1MHz, ZO = 50Ω,
tr ≤3ns, tf ≤3ns.
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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