Datasheet

UNISONIC TECHNOLOGIES CO., LTD
U74AHC374
CMOS IC
OCTAL EDGE-TRIGGERED
D-TYPE FLIP-FLOPS WITH
3-STATE OUTPUTS

DESCRIPTION
The U74AHC374 is a octal edge-triggered D-type flip-flops with
3-state outputs and it has 8 channels.
When the OE input is low, on the positive transition of the clock
(CLK) input, the Q outputs are set to the logic levels of the data (D)
inputs.
When the OE input is high, the outputs are in the high-impedance.
To ensure the high-impedance state during power up or power
down, OE should be tied to VCC through a pull-up resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.

TSSOP-20
FEATURES
* Operate from 2V to 5.5V
* Max tPD of 12.7ns at VCC=3.3V, CL=15pF
* Max ICC of 4uA
* Typ VOL< 0.36V at VCC=4.5V,IO=8mA,TA=25°C
* Typ VOH> 3.94V at VCC=4.5V,IO=-8mA, TA=25°C

ORDERING INFORMATION
Ordering Number
U74AHC374G-P20-R
■
Package
TSSOP-20
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
1 of 6
QW-R502-668.B
U74AHC374
CMOS IC

PIN CONFIGURATION

FUNCTION TABLE

INPUTS( OE )
INPUTS(CLK)
INPUTS(D)
OUTPUT(Q)
L
L
L
H
↑
↑
H or L
X
H
L
X
X
H
L
Q0
Z
LOGIC SYMBOL
OE 1
CLK 11
1D 3
2D
3D
4D
4
EN
C1
1D
7
8
5D 13
6D 14
7D 17
8D 18

2 1Q
5 2Q
6 3Q
9 4Q
12 5Q
15 6Q
16 7Q
19 8Q
LOGIC DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 6
QW-R502-668.B
U74AHC374

CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC
-0.5 ~ 7
V
Input Voltage
VIN
-0.5 ~ 7
V
Output Voltage
VOUT
-0.5 ~ VCC +0.5
V
VCC or GND Current
ICC
±75
mA
Output Current
IOUT
±25
mA
Input Clamp Current
IIK
-20
mA
Output Clamp Current
IOK
±20
mA
Operating Temperature
TOPR
-40 ~ + 85
℃
Storage Temperature
TSTG
-65 ~ + 150
℃
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.

RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply Voltage
SYMBOL
VCC
High-level Input Voltage
VIH
Low-level Input Voltage
VIL
Input Voltage
Output Voltage
VIN
VOUT
High-level Output Current
IOH
Low-level Output Current
IOL
Input Rise or Fall Times
tR, tF

TEST CONDITIONS
VCC=2V
VCC=3V
VCC=5.5V
VCC=2V
VCC=3V
VCC=5.5V
High or low state
VCC = 2 V
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
VCC = 2 V
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
MIN
2
1.5
2.1
3.85
TYP
MAX
5.5
UNIT
V
V
0.5
0.9
1.65
VCC
VCC
-50
-4
-8
50
4
8
100
20
0
0
V
V
V
μA
mA
μA
mA
ns
ELECTRICAL CHARACTERISTICS (TA=25°С)
PARAMETER
Output Voltage High-Level
SYMBOL
VOH
Output Voltage Low-Level
VOL
Input Leakage Current
3-state Leakage Current
Quiescent Supply Current
Input Capacitance
Output Capacitance
II(LEAK)
IOZ
ICC
CI
CO
TEST CONDITIONS
VCC=2V, IOH=-50μA
VCC=3V, IOH=-50μA
VCC=4.5V, IOH=-50μA
VCC=3V, IOH=-4mA
VCC=4.5V, IOH=-8mA
VCC=2V, IOH=50μA
VCC=3V, IOH=50μA
VCC=4.5V, IOH=50μA
VCC=3V, IOH=4mA
VCC=4.5V, IOH=8mA
VCC= 0 to 5.5V, VIN=5.5V or GND
VCC=5.5V, VOUT= VCC or GND
VCC=5.5V, VIN=VCC or GND, IOUT=0
VCC=5V, VIN=VCC or GND
VCC=5V, VOUT=VCC or GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
MIN
1.9
2.9
4.4
2.58
3.94
TYP
2
3
4.5
4
6
MAX
UNIT
V
0.1
0.1
0.1
0.36
0.36
±0.1
±0.25
4
10
V
μA
μA
μA
pF
pF
3 of 6
QW-R502-668.B
U74AHC374

CMOS IC
SWITCHING CHARACTERISTICS (See TEST CIRCUIT AND WAVEFORMS)
PARAMETER
SYMBOL
From CLK to Q
tPLH/tPHL
From OE to Q
tPZL/tPZH
From OE to Q
tPLZ/tPHZ
Maximum Clock Frequency
fMAX
Pulse Width
tW
Setup Time
tSU
Hold Time
tH

TEST CONDITIONS
CL =15pF
VCC = 3.3V ± 0.3V
CL =50pF
CL =15pF
VCC = 5V ± 0.5V
CL =50pF
CL =15pF
VCC = 3.3V ± 0.3V
CL =50pF
CL =15pF
VCC = 5V ± 0.5V
CL =50pF
CL =15pF
VCC = 3.3V ± 0.3V
CL =50pF
CL =15pF
VCC = 5V ± 0.5V
CL =50pF
CL =15pF
VCC = 3.3V ± 0.3V
CL =50pF
CL =15pF
VCC = 5V ± 0.5V
CL =50pF
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
VCC = 3.3 V ± 0.3 V
VCC = 5 V ± 0.5 V
MIN
80
55
130
85
5
5
4.5
3
2
2
TYP
8.1
10.6
5.4
6.9
7.1
9.6
5.1
6.6
7.5
10.2
4.6
6.1
130
85
185
120
MAX
12.7
16.2
8.1
10.1
11
14.5
7.6
9.6
10.5
14
6.8
8.8
UNIT
ns
ns
ns
MHz
ns
ns
ns
OPERATING CHARACTERISTICS (TA=25°С)
PARAMETER
Power Dissipation Capacitance
SYMBOL
TEST CONDITIONS
CPD
No load, VCC = 5 V, f=1MHz
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
RATINGS
32
UNIT
pF
4 of 6
QW-R502-668.B
U74AHC374

CMOS IC
TEST CIRCUIT AND WAVEFORMS
VCC
Input
VM
VLOAD
≤3ns
VCC/2
VCC
≤3ns
VCC/2
VCC
VIN
tR, tF
3.3V±0.3V
VCC
5V±0.5V
VCC
TEST
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
VLOAD
GND
CL
RL
V∆
1kΩ
0.3V
1kΩ
0.5V
15pF
50pF
15pF
50pF
tW
VIN
Input
VM
VM
0
V
Pulse Duration
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R502-668.B
U74AHC374

CMOS IC
TEST CIRCUIT AND WAVEFORMS(Cont.)
VIN
Input
VM
VM
tPLH
tPHL
0V
VOH
Output
VM
VM
VOL
tPLH
tPHL
VOH
VM
Output
VM
VOL
Voltage Waveforms Propagation Delay Times
Note: A. CL includes probe and jig capacitance.
Note: B. 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
6 of 6
QW-R502-668.B
Similar pages