MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage CMOS Quad
Buffer
With 5V-Tolerant Inputs and Outputs
(3-State, Non-Inverting)
The MC74LCX125 is a high performance, non±inverting quad buffer operating 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 MC74LCX125 inputs to be safely driven from 5V devices. The MC74LCX125 is suitable for memory address driving and all TTL level bus oriented transceiver applications.
Current drive capability is 24mA at the outputs. The Output Enable (OEn) inputs, when HIGH, disable the outputs by placing them in a HIGH Z condition.
•Designed for 2.7 to 3.6V VCC Operation
•5V Tolerant Ð Interface Capability With 5V TTL Logic
•Supports Live Insertion and Withdrawal
•IOFF Specification Guarantees High Impedance When VCC = 0V
•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 |
OE3 |
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D3 |
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O3 |
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OE2 |
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D2 |
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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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8 |
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MC74LCX125
LOW±VOLTAGE CMOS
QUAD BUFFER
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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 |
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Function |
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OEn |
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Output Enable Inputs |
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Dn |
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Data Inputs |
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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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On |
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3±State Outputs |
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OE0 |
D0 |
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O0 |
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OE1 |
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D1 |
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O1 |
GND |
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LOGIC DIAGRAM
1 |
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10 |
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OE0 |
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OE2 |
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2 |
3 |
O0 |
9 |
8 |
D0 |
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D2 |
O2 |
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4 |
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13 |
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OE1 |
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OE3 |
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5 |
6 |
O1 |
12 |
11 |
D1 |
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D3 |
O3 |
FUNCTION TABLE
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INPUTS |
OUTPUTS |
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OEn |
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Dn |
On |
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L |
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L |
L |
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L |
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H |
H |
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H |
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X |
Z |
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H = High Voltage Level; L = Low Voltage Level; Z = High Impedance State; X = High or Low Voltage Level and Transitions Are Acceptable, for ICC reasons, DO NOT FLOAT Inputs
11/96
Motorola, Inc. 1996 1 REV 1
MC74LCX125
ABSOLUTE MAXIMUM RATINGS*
Symbol |
Parameter |
Value |
Condition |
Unit |
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VCC |
DC Supply Voltage |
±0.5 to +7.0 |
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V |
VI |
DC Input Voltage |
±0.5 ≤ VI ≤ +7.0 |
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V |
VO |
DC Output Voltage |
±0.5 ≤ VO ≤ +7.0 |
Output in 3±State |
V |
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±0.5 ≤ VO ≤ VCC + 0.5 |
Note 1. |
V |
IIK |
DC Input Diode Current |
±50 |
VI < GND |
mA |
IOK |
DC Output Diode Current |
±50 |
VO < GND |
mA |
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+50 |
VO > VCC |
mA |
IO |
DC Output Source/Sink Current |
±50 |
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mA |
ICC |
DC Supply Current Per Supply Pin |
±100 |
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mA |
IGND |
DC Ground Current Per Ground Pin |
±100 |
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mA |
TSTG |
Storage Temperature Range |
±65 to +150 |
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°C |
*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 |
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(3±State) |
0 |
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5.5 |
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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.
MOTOROLA |
2 |
LCX DATA |
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BR1339 Ð REV 3 |
MC74LCX125
DC ELECTRICAL CHARACTERISTICS (continued)
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TA = ±40°C to +85°C |
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Symbol |
Characteristic |
Condition |
Min |
Max |
Unit |
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II |
Input Leakage Current |
2.7V ≤ VCC ≤ 3.6V; 0V ≤ VI ≤ 5.5V |
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±5.0 |
μA |
IOZ |
3±State Output Current |
2.7 ≤ VCC ≤ 3.6V; 0V ≤ VO ≤ 5.5V; |
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±5.0 |
μA |
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VI = VIH or V IL |
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IOFF |
Power±Off Leakage Current |
VCC = 0V; VI or VO = 5.5V |
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10 |
μA |
ICC |
Quiescent Supply Current |
2.7 ≤ VCC ≤ 3.6V; VI = GND or VCC |
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10 |
μA |
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2.7 ≤ VCC ≤ 3.6V; 3.6 ≤ VI or VO ≤ 5.5V |
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±10 |
μA |
ICC |
Increase in ICC per Input |
2.7 ≤ VCC ≤ 3.6V; VIH = VCC ± 0.6V |
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500 |
μA |
AC CHARACTERISTICS (tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
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Limits |
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TA = ±40°C to +85°C |
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VCC = 3.0V to 3.6V |
VCC = 2.7V |
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Symbol |
Parameter |
Waveform |
Min |
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Max |
Max |
Unit |
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tPLH |
Propagation Delay |
1 |
1.5 |
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6.0 |
6.5 |
ns |
tPHL |
Input to Output |
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1.5 |
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6.0 |
6.5 |
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tPZH |
Output Enable Time to |
2 |
1.5 |
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7.0 |
8.0 |
ns |
tPZL |
High and Low Level |
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1.5 |
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7.0 |
8.0 |
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tPHZ |
Output Disable Time From |
2 |
1.5 |
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6.0 |
7.0 |
ns |
tPLZ |
High and Low Level |
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1.5 |
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6.0 |
7.0 |
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tOSHL |
Output±to±Output Skew |
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1.0 |
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ns |
tOSLH |
(Note 3.) |
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1.0 |
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3.Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH±to±LOW (tOSHL) or LOW±to±HIGH (tOSLH); parameter guaranteed by design.
DYNAMIC SWITCHING CHARACTERISTICS
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TA = +25°C |
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Symbol |
Characteristic |
Condition |
Min |
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Typ |
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Max |
Unit |
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VOLP |
Dynamic LOW Peak Voltage (Note 4.) |
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V |
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0.8 |
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V |
VOLV |
Dynamic LOW Valley Voltage (Note 4.) |
VCC = 3.3V, CL = 50pF, VIH = 3.3V, VIL = 0V |
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0.8 |
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V |
4.Number of outputs defined as ªnº. Measured with ªn±1º outputs switching from HIGH±to±LOW or LOW±to±HIGH. The remaining output is measured in the LOW state.
CAPACITIVE CHARACTERISTICS
Symbol |
Parameter |
Condition |
Typical |
Unit |
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CIN |
Input Capacitance |
VCC = 3.3V, VI = 0V or VCC |
7 |
pF |
COUT |
Output Capacitance |
VCC = 3.3V, VI = 0V or VCC |
8 |
pF |
CPD |
Power Dissipation Capacitance |
10MHz, VCC = 3.3V, VI = 0V or VCC |
25 |
pF |
LCX DATA |
3 |
MOTOROLA |
BR1339 Ð REV 3 |
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