Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHCT3G17
CMOS IC
NON-INVERTING SCHMITT
TRIGGER
„
DESCRIPTION
The U74AHCT3G17 is a high-speed triple Schmitt-trigger buffer.
It provides three Schmitt-trigger buffers with the function Y=A.
The trigger is capable of transforming slowly changing input signals
into sharply defined, jitter-free output signals.
The U74AHCT3G17 is compatible with TTL input switching
levels and has supply voltage range from 4.5V to 5.5V.
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TSSOP-8
FEATURES
* Low power supply 1.0μA at 5.5V
* Up to 5.5V inputs accept voltages
* Symmetrical output impedance
* High noise immunity
* Balanced propagation delays
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APPLICATION
* Astable multivibrators
* Monostable multivibrators
* Wave and pulse shapers
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ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
U74AHCT3G17L-P08-R
U74AHCT3G17G-P08-R
U74AHCT3G17L-P08-T
U74AHCT3G17G-P08-T
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Copyright © 2011 Unisonic Technologies Co., Ltd
Package
Packing
TSSOP-8
TSSOP-8
Tape Reel
Tube
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U74AHCT3G17
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CMOS IC
PIN CONFIGURATION
1A
1
8
VCC
3Y
2
7
1Y
2A
3
6
3A
GND
4
5
2Y
FUNCTION TABLE
INPUT
nA
L
H
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LOGIC SYMBOL
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LOGIC DIAGRAM (one driver)
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OUTPUT
nY
L
H
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CMOS IC
ABSOLUTE MAXIMUM RATING (unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5~7.0
V
Input Voltage
VIN
-0.5~7.0
V
Output Voltage
VOUT
0~VCC
V
Input Diode Current (VI < -0.5V)
IIK
-20
mA
Output Diode Current (VO < -0.5V or VO > VCC + 0.5V)
IOK
±20
mA
Output Source or Sink Current (-0.5V<VO<VCC + 0.5V)
IOUT
±25
mA
VCC or GND Current
ICC
±75
mA
PD
mW
Power Dissipation
250
Storage Temperature
TSTG
-65 ~ +150
°C
Note: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. 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.
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RECOMMENDED OPERATING COMDITIONS
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
Operating Temperature
„
SYMBOL
VCC
VI
VO
TA
TYP
5.0
+25
MAX
5.5
5.5
VCC
+125
UNIT
V
V
V
°C
ELECTRICAL CHARACTERISTICS (TA =25°C , unless otherwise specified)
PARAMETER
SYMBOL
High-Level Output Voltage
VOH
Low-Level Output Voltage
VOL
Input Leakage Current
Quiescent Supply Current
II(LEAK)
ICC
Additional Quiescent Supply Current
Δ ICC
Input Capacitance
„
MIN
4.5
0
0
-40
TEST CONDITIONS
VI = VIH or VIL, IO = -50μA, VCC = 4.5V
VI = VIH or VIL, IO = -8.0mA, VCC = 4.5V
VI = VIH or VIL, IO = 50μA, VCC = 4.5V
VI = VIH or VIL, IO = 8.0mA, VCC = 4.5V
VI = VCC or GND, VCC = 5.5V, IO = 0 A
VI = VCC or GND, IO = 0 A
One input at 3.4V, IOUT = 0, VCC = 5.5V,
Other inputs at VCC or GND
CIN
1.5
TRANSFER CHARACTERISTICS
PARAMETER
SYMBOL
Positive-going Threshold
VT+
Negative-going Threshold
VT-
Hysteresis (VT+ - VT-)
VH
UNIT
V
V
μA
μA
1.35
mA
10
pF
(TA =25°C , unless otherwise specified)
TEST CONDITIONS
VCC = 4.5V
VCC = 5.5V
VCC = 4.5V
VCC = 5.5V
VCC = 4.5V
VCC = 5.5V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN TYP MAX
4.4
4.5
3.94
0
0.1
0.36
0.1
1.0
MIN
0.5
0.6
0.4
0.4
TYP MAX
2.0
2.0
UNIT
V
V
1.4
1.6
V
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AC CHARACTERISTICS (TA =25°C, GND = 0V, tR = tF ≤ 3.0 ns)
PARAMETER
Propagation Delay
from Input (nA) to Output (nY)
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CMOS IC
SYMBOL
TEST CONDITIONS
tPLH/tPHL VCC = 4.5 to 5.5V, CL = 15 pF
(tPD)
VCC = 4.5 to 5.5V, CL = 50 pF
MIN TYP MAX UNIT
4.1
7.0
ns
5.9
8.5
OPERATING CHARACTERISTICS (TA =25°C)
PARAMETER
SYMBOL
TEST CONDITIONS
Power Dissipation Capacitance Per Buffer
CPD
CL= 50pF, f=1MHz (Note 1, 2)
Notes:
1. CPD is used to determine the dynamic power dissipation (PD in μW).
PD = CPD × VCC2 × fI × N + Σ(CL × VCC2 × fO) where:
fI = input frequency in MHz;
fO = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in Volts;
N = number of inputs switching;
Σ(CL × VCC2 × fO) = sum of the outputs.
2. The condition is VI = GND to VCC.
UNISONIC TECHNOLOGIES CO., LTD
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TYP
12
UNIT
pF
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CMOS IC
WAVEFORMS
Fig.1 Transfer characteristic
VT+
VT-
VI
VH
VO
Fig.2 Definitions of VT+ , VT- and VH
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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CMOS IC
TEST CIRCUIT AND WAVEFORMS
Definitions for test circuit:
CL = Load capacitance including jig and probe capacitance.
RT = Termination resistance should be equal to the output impedance ZO of the pulse generator.
VCC
4.5 to 5.5V
INPUTS
VIN
GND to 3.0 V
tR, tF
≤3ns
VM
CL
1.5 V
15 or 50 pF
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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www.unisonic.com.tw
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