MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Low-Voltage |
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CMOS |
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MC74LCX540 |
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Octal |
Buffer |
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Flow |
Through |
Pinout |
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With |
5V-Tolerant |
Inputs |
and Outputs |
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(3-State, |
Inverting) |
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The MC74LCX540 is a high performance, inverting octal buffer |
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operating from a 2.7 to 3.6V supply. This device is similar in function to the |
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LOW±VOLTAGE CMOS |
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MC74LCX240, while providing flow through architecture. High |
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impedance TTL compatible inputs significantly reduce current loading to |
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OCTAL BUFFER |
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input drivers while TTL compatible outputs offer improved switching noise |
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performance. A VI specification of 5.5V allows MC74LCX540 inputs to be |
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safely driven from 5V devices. The MC74LCX540 is suitable for memory |
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address driving and all TTL level bus oriented transceiver applications. |
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Current drive capability is 24mA at the outputs. The Output Enable |
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(OE1, OE2) inputs, when HIGH, disables the outputs by placing them in a |
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HIGH Z condition. |
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DW SUFFIX |
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20 |
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PLASTIC SOIC |
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CASE 751D±04 |
• Designed for 2.7 to 3.6V VCC Operation |
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1 |
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• 5V Tolerant Ð Interface Capability With 5V TTL Logic |
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• Supports Live Insertion and Withdrawal |
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M SUFFIX |
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• IOFF Specification Guarantees High Impedance When VCC = 0V |
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20 |
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PLASTIC SOIC EIAJ |
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• LVTTL Compatible |
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1 |
CASE 967±01 |
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• LVCMOS Compatible |
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• 24mA Balanced Output Sink and Source Capability |
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• Near Zero Static Supply Current in All Three Logic States (10μA) |
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SD SUFFIX |
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Substantially Reduces System Power Requirements |
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20 |
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PLASTIC SSOP |
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• Latchup Performance Exceeds 500mA |
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1 |
CASE 940C±03 |
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• ESD Performance: Human Body Model >2000V; Machine Model >200V |
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20 |
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DT SUFFIX |
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PLASTIC TSSOP |
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1 |
CASE 948E±02 |
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Pinout: 20±Lead (Top View) |
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VCC |
OE2 |
O0 |
O1 |
O2 |
O3 |
O4 |
O5 |
O6 |
O7 |
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20 |
19 |
18 |
17 |
16 |
15 |
14 |
13 |
12 |
11 |
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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On |
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3±State Outputs |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
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OE1 |
D0 |
D1 |
D2 |
D3 |
D4 |
D5 |
D6 |
D7 |
GND |
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8/95
Motorola, Inc. 1996 |
1 |
REV 1 |
MC74LCX540
LOGIC DIAGRAM
1
OE1 |
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19 |
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OE2 |
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2 |
18 |
D0 |
O0 |
3 |
17 |
D1 |
O1 |
4 |
16 |
D2 |
O2 |
5 |
15 |
D3 |
O3 |
6 |
14 |
D4 |
O4 |
7 |
13 |
D5 |
O5 |
8 |
12 |
D6 |
O6 |
9 |
11 |
D7 |
O7 |
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INPUTS |
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OUTPUTS |
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OE1 |
OE2 |
Dn |
On |
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L |
L |
L |
H |
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L |
L |
H |
L |
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X |
H |
X |
Z |
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H |
X |
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
MOTOROLA |
2 |
LCX DATA |
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BR1339 Ð REV 3 |
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MC74LCX540 |
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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 ≤ +7.0 |
Output in 3±State |
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V |
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±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 |
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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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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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