MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS
Dual D-Type Flip-Flop
With 5V-Tolerant Inputs
The MC74LCX74 is a high performance, dual D±type flip±flop with asynchronous clear and set inputs and complementary (O, O) outputs. It operates from a 2.7 to 3.6V supply. High impedance TTL compatible inputs significantly reduce current loading to input drivers while TTL compatible outputs offer improved switching noise performance. A VI specification of 5.5V allows MC74LCX74 inputs to be safely driven from 5V devices.
The MC74LCX74 consists of 2 edge±triggered flip±flops with individual D±type inputs. The flip±flop will store the state of individual D inputs, that meet the setup and hold time requirements, on the LOW±to±HIGH Clock (CP) transition.
•Designed for 2.7 to 3.6V VCC Operation
•5V Tolerant Inputs Ð Interface Capability With 5V TTL Logic
•LVTTL Compatible
•LVCMOS Compatible
•24mA Balanced Output Sink and Source Capability
•Near Zero Static Supply Current in All Three Logic States (10μA) Substantially Reduces System Power Requirements
•Latchup Performance Exceeds 500mA
•ESD Performance: Human Body Model >2000V; Machine Model >200V
Pinout: 14±Lead (Top View)
VCC |
CD2 |
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D2 |
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CP2 |
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SD2 |
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O2 |
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O2 |
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14 |
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13 |
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12 |
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11 |
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10 |
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9 |
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1 |
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2 |
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3 |
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4 |
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5 |
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6 |
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7 |
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CD1 |
D1 |
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CP1 |
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SD1 |
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O1 |
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O1 |
GND |
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MC74LCX74
LOW±VOLTAGE CMOS DUAL D±TYPE FLIP±FLOP
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D SUFFIX |
14 |
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PLASTIC SOIC |
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1 |
CASE 751A±03 |
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M SUFFIX |
14 |
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PLASTIC SOIC EIAJ |
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1 |
CASE 965±01 |
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14 |
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SD SUFFIX |
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PLASTIC SSOP |
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1 |
CASE 940A±03 |
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14 |
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DT SUFFIX |
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PLASTIC TSSOP |
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1 |
CASE 948G±01 |
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PIN NAMES
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Pins |
Function |
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CP1, CP2 |
Clock Pulse Inputs |
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D1, D2 |
Data Inputs |
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CD1, CD2 |
Direct Clear Inputs |
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SD1, SD2 |
Direct Set Inputs |
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On, On |
Outputs |
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11/96
Motorola, Inc. 1996 1 REV 1
MC74LCX74
LOGIC DIAGRAM
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4 |
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SD1 |
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SD |
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2 |
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5 |
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D1 |
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D |
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Q |
O1 |
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6 |
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Q |
O1 |
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CP1 |
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CP |
CD |
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1 |
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CD1 |
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10 |
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SD2 |
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SD |
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12 |
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9 |
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D2 |
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D |
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Q |
O2 |
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11 |
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8 |
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Q |
O2 |
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CP2 |
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CP |
CD |
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13 |
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CD2 |
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INPUTS |
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OUTPUTS |
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SDn |
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CDn |
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CPn |
Dn |
On |
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On |
OPERATING MODE |
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L |
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H |
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X |
X |
H |
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L |
Asynchronous Set |
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H |
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L |
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X |
X |
L |
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H |
Asynchronous Clear |
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L |
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L |
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X |
X |
H |
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H |
Undetermined |
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H |
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H |
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↑ |
h |
H |
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L |
Load and Read Register |
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H |
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H |
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↑ |
l |
L |
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H |
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H |
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H |
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↑ |
X |
NC |
NC |
Hold |
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H = High Voltage Level; h = High Voltage Level One Setup Time Prior to the Low±to±High Clock Transition; L = Low Voltage Level; l = Low Voltage Level One Setup Time Prior to the Low±to±High Clock Transition; NC = No Change; X = High or Low Voltage Level or Transitions are Acceptable; ↑ = Low±to±High Transition; ↑ = Not a Low±to±High Transition; For ICC Reasons DO NOT FLOAT Inputs
MOTOROLA |
2 |
LCX DATA |
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BR1339 Ð REV 3 |
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MC74LCX74 |
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ABSOLUTE MAXIMUM RATINGS* |
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Symbol |
Parameter |
Value |
Condition |
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Unit |
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VCC |
DC Supply Voltage |
±0.5 to +7.0 |
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V |
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VI |
DC Input Voltage |
±0.5 ≤ VI ≤ +7.0 |
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V |
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VO |
DC Output Voltage |
±0.5 ≤ VO ≤ VCC + 0.5 |
Note 1. |
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V |
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IIK |
DC Input Diode Current |
±50 |
VI < GND |
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mA |
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IOK |
DC Output Diode Current |
±50 |
VO < GND |
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mA |
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+50 |
VO > VCC |
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mA |
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IO |
DC Output Source/Sink Current |
±50 |
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mA |
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ICC |
DC Supply Current Per Supply Pin |
±100 |
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mA |
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IGND |
DC Ground Current Per Ground Pin |
±100 |
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mA |
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TSTG |
Storage Temperature Range |
±65 to +150 |
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°C |
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*Absolute maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions beyond those indicated may adversely affect device reliability. Functional operation under absolute±maximum±rated conditions is not implied.
1. Output in HIGH or LOW State. IO absolute maximum rating must be observed.
RECOMMENDED OPERATING CONDITIONS
Symbol |
Parameter |
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Min |
Typ |
Max |
Unit |
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VCC |
Supply Voltage |
Operating |
2.0 |
3.3 |
3.6 |
V |
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Data Retention Only |
1.5 |
3.3 |
3.6 |
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VI |
Input Voltage |
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0 |
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5.5 |
V |
VO |
Output Voltage |
(HIGH or LOW State) |
0 |
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VCC |
V |
IOH |
HIGH Level Output Current, VCC = 3.0V ± 3.6V |
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±24 |
mA |
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IOL |
LOW Level Output Current, VCC = 3.0V ± 3.6V |
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24 |
mA |
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IOH |
HIGH Level Output Current, VCC = 2.7V ± 3.0V |
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±12 |
mA |
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IOL |
LOW Level Output Current, VCC = 2.7V ± 3.0V |
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12 |
mA |
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TA |
Operating Free±Air Temperature |
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±40 |
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+85 |
°C |
t/ V |
Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V, |
0 |
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10 |
ns/V |
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VCC = 3.0V |
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DC ELECTRICAL CHARACTERISTICS
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TA = ±40°C to +85°C |
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Symbol |
Characteristic |
Condition |
Min |
Max |
Unit |
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VIH |
HIGH Level Input Voltage (Note 2.) |
2.7V ≤ VCC ≤ 3.6V |
2.0 |
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V |
VIL |
LOW Level Input Voltage (Note 2.) |
2.7V ≤ VCC ≤ 3.6V |
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0.8 |
V |
VOH |
HIGH Level Output Voltage |
2.7V ≤ VCC ≤ 3.6V; IOH = ±100μA |
VCC ± 0.2 |
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V |
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VCC = 2.7V; IOH = ±12mA |
2.2 |
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VCC = 3.0V; IOH = ±18mA |
2.4 |
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VCC = 3.0V; IOH = ±24mA |
2.2 |
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VOL |
LOW Level Output Voltage |
2.7V ≤ VCC ≤ 3.6V; IOL = 100μA |
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0.2 |
V |
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VCC = 2.7V; IOL= 12mA |
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0.4 |
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VCC = 3.0V; IOL = 16mA |
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0.4 |
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VCC = 3.0V; IOL = 24mA |
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0.55 |
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2. These values of VI are used to test DC electrical characteristics only.
LCX DATA |
3 |
MOTOROLA |
BR1339 Ð REV 3 |
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