U74LCX74 Datasheet PDF - Unisonic Technologies


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U74LCX74
Unisonic Technologies

Part Number U74LCX74
Description LOW VOLTAGE DUAL D-TYPE POSITIVE EDGE-TRIGGERED FLIP-FLOP
Page 7 Pages

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UNISONIC TECHNOLOGIES CO., LTD
U74LCX74
LOW VOLTAGE DUAL D-TYPE
POSITIVE EDGE-TRIGGERED
FLIP-FLOP WITH 5V TOLERANT
INPUTS
CMOS IC
DESCRIPTION
The U74LCX74 is a dual D-type flip-flop with Asynchronous Clear
and Set inputs and complementary (Q, Q ) outputs. Information at the
input is transferred to the outputs on the positive edge of the clock
pulse. After the Clock Pulse input threshold voltage has been passed,
the Data input is locked out and information present will not be
transferred to the outputs until the next rising edge of the Clock Pulse
input.
Asynchronous inputs:
LOW input to SD (Set) sets Q to HIGH level
LOW input to CD (Clear) sets Q to LOW level
Clear and Set are independent of clock
Simultaneous LOW on CD and SD makes both Q and Q high
FEATURES
* 2.3V-3.6V VCC specifications provided
* 5V tolerant inputs
* 7.0 ns tPD max (VCC=3.3V), ICC=10μA (max.)
* Power down high impedance inputs and outputs
* ±24mA output drive (VCC=3.0V)
ORDERING INFORMATION
Ordering Number
U74LCX74G-P14-R
Package
TSSOP-14
Packing
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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U74LCX74
PIN CONFIGURATION
CMOS IC
PIN DESCRIPTIONS
Pin Names
D1, D2
CP1, CP2
CD1, CD2
SD1, SD2
Q1, Q1 , Q2, Q2
Description
Data inputs
Clock Pulse Inputs
Direct Clear Inputs
Direct Set Inputs
Outputs
FUNCTION TABLE (each gate)
INPUT
SD CD CP D
LHXX
HLXX
L LXX
HH H
HH L
OUTPUT
QQ
HL
LH
HH
HL
LH
Function
Asynchronous Set
Asynchronous Clear
Undetermined
Load and Read Register
H H L X Q0
H=High Voltage Level; L=Low Voltage Level;
X=Immaterial; =Low-to-High Clock Transition;
Q0
Hold
Q0 ( Q0 )=Previous Q( Q ) before Low-to-High Transition of Clock
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www.unisonic.com.tw
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U74LCX74
LOGIC DIAGRAM (positive logic)
CMOS IC
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U74LCX74
CMOS IC
ABSOLUTE MAXIMUM RATING (unless otherwise specified)(Note 1)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VCC -0.5~7.0 V
Input Voltage
VIN -0.5~ 7.0 V
Output Voltage
VOUT
-0.5~VCC+0.5
V
Input Diode Current(VI<GND)
IIK
-50 mA
Output Diode Current(VO<GND or VO>VCC)
IOK
±50 mA
Output Current
IOUT ±50 mA
VCC or GND Current
ICC
±100
mA
Ground Current
IGND ±100 mA
Storage Temperature
TSTG
-65 ~ +150
°C
Notes: 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.
RECOMMENDED OPERATING COMDITIONS
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
Input Transition Rise or Fall Rate
Operating Temperature
SYMBOL
VCC
VIN
VOUT
t/v
TA
CONDITIONS
Input Edge Rate,
VIN=0.8V-2V, VCC=3v
MIN
2.0
0
0
0
-40
TYP
MAX
3.6
5.5
VCC
10
+85
UNIT
V
V
V
ns/V
°C
STATIC CHARACTERISTICS (TA=-40°C to +85°C, unless otherwise specified)
PARAMETER
High-level input voltage
Low-level input voltage
High-Level Output Voltage
Low-Level Output Voltage
Input Leakage Current
Quiescent Supply Current
Increase ICC per input
Power-Off Leakage Current
Input Capacitance
Output Capacitance
SYMBOL
TEST CONDITIONS
VIH
VCC=2.3V to 2.7V
VCC =2.7V to 3.6V
VIL
VCC=2.3V to 2.7V
VCC =2.7V to 3.6V
VCC=2.3V to 3.6V, IOH=-100μA
VCC=2.3V, IOH=-8mA
VOH VCC=2.7V, IOH=-12mA
VCC=3V, IOH=-18mA
VCC=3V, IOH=-24mA
VCC=2.3V to 3.6V, IOL=100uA
VCC=2.3V, IOL=8mA
VOL VCC=2.7V, IOL=12mA
VCC=3V, IOL=16mA
II(LEAK)
VCC=3V, IOL=24mA
VCC =2.3V ~ 3.6V, VIN=0 ~ 5.5V
VCC = 2.3V to 3.6V,
IQ VIN= VCC or GND
VCC = 2.3V to 3.6V, 3.6VVIN5.5V
IQ VCC=2.3V to 3.6V, VIH=VCC-0.6V
IOFF VCC=0, VIN or VOUT = 5.5V
CIN VCC=Open, VI=0 or VCC
COUT VCC=3.3V, VI=0 or VCC
MIN
1.7
2.0
VCC-0.2
1.8
2.2
2.4
2.2
TYP
7.0
8.0
MAX
0.7
0.8
UNIT
V
V
V
0.2
0.6
0.4 V
0.4
0.55
±5 μA
10 μA
±10
500 μA
10 μA
pF
pF
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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