MOTOROLA MC74LCX245M, MC74LCX245DTR2, MC74LCX245DWR2, MC74LCX245DTEL, MC74LCX245SD Datasheet
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SEMICONDUCTOR TECHNICAL DATA
1
REV 3
Motorola, Inc. 1996
9/95
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The MC74LCX245 is a high performance, non–inverting octal
transceiver 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 MC74LCX245 inputs to be
safely driven from 5V devices. The MC74LCX245 is suitable for memory
address driving and all TTL level bus oriented transceiver applications.
Current drive capability is 24mA at both A and B ports. The
Transmit/Receive (T/R
) input determines the direction of data flow
through the bi–directional transceiver. Transmit (active–HIGH) enables
data from A ports to B ports; Receive (active–LOW) enables data from B
to A ports. The Output Enable input, when HIGH, disables both A and B
ports by placing them in a HIGH Z condition.
• Designed for 2.7 to 3.6V V
CC
Operation
• 5V T olerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
• I
OFF
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: 20–Lead (Top View)
1920 18 17 16 15 14
21 34567
V
CC
13
8
12
9
11
10
OE
B0 B1 B2 B3 B4 B5 B6 B7
T/R
A0 A1 A2 A3 A4 A5 A6 A7 GND
DW SUFFIX
PLASTIC SOIC
CASE 751D–04
DT SUFFIX
PLASTIC TSSOP
CASE 948E–02
20
1
20
1
M SUFFIX
PLASTIC SOIC EIAJ
CASE 967–01
20
1
SD SUFFIX
PLASTIC SSOP
CASE 940C–03
20
1
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
PIN NAMES
Function
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
Side B 3–State Inputs or 3–State
Outputs
Pins
OE
T/R
A0–A7
B0–B7
MC74LCX245
MOTOROLA LCX DATA
BR1339 — REV 3
2
B0
OE
19
T/R 1
A0
B1
A1
B2
A2
B3
A3
B4
A4
B5
A5
B6
A6
B7
A7
LOGIC DIAGRAM
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
INPUTS
OE T/R
OPERATING MODE
Non–Inverting
L L B Data to A Bus
L H A Data to B Bus
H X Z
H = High Voltage Level; L = Low V oltage Level; Z = High Impedance State; X = High or Low Voltage Level
and Transitions are Acceptable; For ICC reasons, Do Not Float Inputs
MC74LCX245
LCX DATA
BR1339 — REV 3
3 MOTOROLA
ABSOLUTE MAXIMUM RATINGS*
Symbol Parameter Value Condition Unit
V
CC
DC Supply Voltage –0.5 to +7.0 V
V
I
DC Input Voltage –0.5 ≤ VI ≤ +7.0 V
V
O
DC Output Voltage –0.5 ≤ VO ≤ +7.0 Output in 3–State V
–0.5 ≤ VO ≤ VCC + 0.5 Note 1. V
I
IK
DC Input Diode Current –50 VI < GND mA
I
OK
DC Output Diode Current –50 VO < GND mA
+50 VO > V
CC
mA
I
O
DC Output Source/Sink Current ±50 mA
I
CC
DC Supply Current Per Supply Pin ±100 mA
I
GND
DC Ground Current Per Ground Pin ±100 mA
T
STG
Storage Temperature Range –65 to +150 °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 Min Typ Max Unit
V
CC
Supply Voltage Operating
Data Retention Only
2.0
1.5
3.3
3.3
3.6
3.6
V
V
I
Input Voltage 0 5.5 V
V
O
Output Voltage (HIGH or LOW State)
(3–State)
0
0
V
CC
5.5
V
I
OH
HIGH Level Output Current, VCC = 3.0V – 3.6V –24 mA
I
OL
LOW Level Output Current, VCC = 3.0V – 3.6V 24 mA
I
OH
HIGH Level Output Current, VCC = 2.7V – 3.0V –12 mA
I
OL
LOW Level Output Current, VCC = 2.7V – 3.0V 12 mA
T
A
Operating Free–Air Temperature –40 +85 °C
∆t/∆V Input Transition Rise or Fall Rate, VIN from 0.8V to 2.0V ,
VCC = 3.0V
0 10 ns/V
DC ELECTRICAL CHARACTERISTICS
TA = –40°C to +85°C
Symbol Characteristic Condition Min Max Unit
V
IH
HIGH Level Input Voltage (Note 2.) 2.7V ≤ VCC ≤ 3.6V 2.0 V
V
IL
LOW Level Input Voltage (Note 2.) 2.7V ≤ VCC ≤ 3.6V 0.8 V
V
OH
HIGH Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOH = –100µA VCC– 0.2 V
VCC = 2.7V; IOH = –12mA 2.2
VCC = 3.0V; IOH = –18mA 2.4
VCC = 3.0V; IOH = –24mA 2.2
V
OL
LOW Level Output Voltage 2.7V ≤ VCC ≤ 3.6V; IOL = 100µA 0.2 V
VCC = 2.7V; IOL= 12mA 0.4
VCC = 3.0V; IOL = 16mA 0.4
VCC = 3.0V; IOL = 24mA 0.55
2. These values of VI are used to test DC electrical characteristics only.
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