MC74LCX2245DW [MOTOROLA]
LOW-VOLTAGE CMOS OCTAL TRANSCEIVER; 低压CMOS八路收发器
| 型号： | MC74LCX2245DW |
| 厂家： | 
MOTOROLA |
| 描述： | LOW-VOLTAGE CMOS OCTAL TRANSCEIVER |
| 文件： | 总8页 (文件大小：165K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SEMICONDUCTOR TECHNICAL DATA
The MC74LCX2245 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
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
performance. A V specification of 5.5V allows MC74LCX2245 inputs to
I
be safely driven from 5V devices. The MC74LCX2245 is designed to
reduce output overshoot and undershoot and is suitable for memory
address driving and all TTL level bus oriented transceiver applications;
especially those requiring the very quiet outputs.
Current drive capability is 12mA 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.
DW SUFFIX
20–LEAD PLASTIC SOIC
CASE 751D–04
M SUFFIX
20–LEAD PLASTIC SOIC EIAJ
CASE 967–01
• Designed for 2.7 to 3.6V V
CC
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
Operation
• I
OFF
Specification Guarantees High Impedance When V
= 0V
CC
• LVTTL Compatible
SD SUFFIX
20–LEADPLASTIC SSOP
CASE 940C–03
• LVCMOS Compatible
• 12mA 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
DT SUFFIX
20–LEAD PLASTIC TSSOP
CASE 948E–02
• ESD Performance: Human Body Model >2000V; Machine Model >200V
V
OE
19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
CC
20
PIN NAMES
Pins
Function
OE
T/R
A0–A7
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
1
2
3
4
5
6
7
9
8
10
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
B0–B7
Side B 3–State Inputs or 3–State
Outputs
Figure 1. 20–Lead Pinout
(Top View)
This document contains information on a product under development. Motorola reserves the right to change or
discontinue this product without notice.
1/97
REV 0
Motorola, Inc. 1997
MC74LCX2245
OE 19
T/R 1
2
3
4
5
6
7
8
9
A0
A1
A2
A3
A4
A5
A6
A7
18
17
16
15
14
13
12
11
B0
B1
B2
B3
B4
B5
B6
B7
Figure 2. Logic Diagram
INPUTS
OPERATING MODE
Non–Inverting
OE
T/R
L
L
L
H
X
B Data to A Bus
A Data to B Bus
Z
H
H = High Voltage Level; L = Low Voltage Level; Z = High Impedance State; X = High or Low Voltage Level
and Transitions are Acceptable; For I reasons, Do Not Float Inputs
CC
MOTOROLA
2
MC74LCX2245
ABSOLUTE MAXIMUM RATINGS*
Symbol
CC
Parameter
Value
Condition
Unit
V
V
V
V
DC Supply Voltage
DC Input Voltage
DC Output Voltage
–0.5 to +7.0
–0.5 ≤ V ≤ +7.0
V
I
I
–0.5 ≤ V ≤ +7.0
Output in 3–State
Note 1.
V
O
O
–0.5 ≤ V ≤ V
+ 0.5
CC
V
O
I
I
DC Input Diode Current
DC Output Diode Current
–50
–50
V < GND
mA
mA
mA
mA
mA
mA
°C
IK
I
V
O
< GND
OK
+50
V > V
O CC
I
I
I
DC Output Source/Sink Current
DC Supply Current Per Supply Pin
DC Ground Current Per Ground Pin
Storage Temperature Range
±50
O
±100
±100
CC
GND
T
–65 to +150
STG
* Absolutemaximumcontinuousratingsarethosevaluesbeyondwhichdamagetothedevicemayoccur. Exposuretotheseconditionsorconditions
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. I absolute maximum rating must be observed.
O
RECOMMENDED OPERATING CONDITIONS
Symbol
CC
Parameter
Min
Typ
Max
Unit
V
Supply Voltage
Operating
Data Retention Only
2.0
1.5
3.3
3.3
3.6
3.6
V
V
V
Input Voltage
0
5.5
V
V
I
Output Voltage
(HIGH or LOW State)
(3–State)
0
0
V
CC
O
5.5
–12
12
I
I
I
I
HIGH Level Output Current, V
= 3.0V – 3.6V
mA
mA
mA
mA
°C
OH
OL
OH
OL
CC
LOW Level Output Current, V
= 3.0V – 3.6V
= 2.7V – 3.0V
= 2.7V – 3.0V
CC
HIGH Level Output Current, V
–8
CC
LOW Level Output Current, V
8
CC
T
A
Operating Free–Air Temperature
Input Transition Rise or Fall Rate, V from 0.8V to 2.0V,
–40
0
+85
10
∆t/∆V
ns/V
IN
V
= 3.0V
CC
DC ELECTRICAL CHARACTERISTICS
T
A
= –40°C to +85°C
Symbol
Characteristic
HIGH Level Input Voltage (Note 2.)
LOW Level Input Voltage (Note 2.)
HIGH Level Output Voltage
Condition
Min
2.0
Max
Unit
V
V
V
V
2.7V ≤ V
≤ 3.6V
IH
CC
CC
2.7V ≤ V
2.7V ≤ V
≤ 3.6V
= –100µA
0.8
V
IL
≤ 3.6V; I
V
– 0.2
V
OH
CC
OH
= –4mA
CC
V
V
V
= 2.7V; I
2.2
CC
CC
CC
OH
OH
OH
OH
= 2.7V; I
= 3.0V; I
= –8mA
= –6mA
= –12mA
2.0
2.4
2.0
V
= 3.0V; I
CC
2. These values of V are used to test DC electrical characteristics only.
I
3
MOTOROLA
MC74LCX2245
DC ELECTRICAL CHARACTERISTICS (continued)
T
A
= –40°C to +85°C
Symbol
Characteristic
LOW Level Output Voltage
Condition
≤ 3.6V; I = 100µA
OL
Min
Max
0.2
Unit
V
OL
2.7V ≤ V
V
CC
= 2.7V; I = 4mA
V
V
0.4
CC
CC
CC
OL
= 2.7V; I = 8mA
0.6
OL
V
= 3.0V; I
= 6mA
0.55
0.8
OL
OL
V
CC
= 3.0V; I
= 12mA
I
I
Input Leakage Current
3–State Output Current
2.7V ≤ V
≤ 3.6V; 0V ≤ V ≤ 5.5V
±5.0
±5.0
µA
µA
I
CC
I
2.7 ≤ V
≤ 3.6V; 0V ≤ V ≤ 5.5V;
OZ
CC
V = V or V
IL
O
I
IH
I
I
Power–Off Leakage Current
Quiescent Supply Current
V
= 0V; V or V = 5.5V
10
10
µA
µA
µA
µA
OFF
CC
I
O
2.7 ≤ V
≤ 3.6V; V = GND or V
CC
CC
I
CC
2.7 ≤ V
≤ 3.6V; 3.6 ≤ V or V ≤ 5.5V
±10
500
CC
I
O
∆I
CC
Increase in I
CC
per Input
2.7 ≤ V
≤ 3.6V; V = V
IH
– 0.6V
CC
CC
AC CHARACTERISTICS (Note 3., t = t = 2.5ns; C = 50pF; R = 500Ω)
R
F
L
L
Limits
T
A
= –40°C to +85°C
V
= 3.0V to 3.6V
Max
V
= 2.7V
CC
CC
Symbol
Parameter
Waveform
Min
Max
Unit
t
t
Propagation Delay
Input to Output
1
1.5
1.5
10.0
10.0
11.0
11.0
ns
PLH
PHL
t
t
Output Enable Time to
High and Low Level
2
2
1.5
1.5
11.5
11.5
12.5
12.5
ns
ns
ns
PZH
PZL
t
t
Output Disable Time From
High and Low Level
1.5
1.5
7.5
7.5
8.5
8.5
PHZ
PLZ
t
t
Output–to–Output Skew
(Note 4.)
1.0
1.0
OSHL
OSLH
3. These AC parameters are preliminary and may be modified prior to release.
4. 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 (t
guaranteed by design.
) or LOW–to–HIGH (t
OSHL
); parameter
OSLH
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Symbol
Characteristic
Condition
Min
Typ
0.8
0.8
Max
Unit
V
V
V
Dynamic LOW Peak Voltage (Note 5.)
Dynamic LOW Valley Voltage (Note 5.)
V
V
= 3.3V, C = 50pF, V = 3.3V, V = 0V
L IH IL
OLP
CC
= 3.3V, C = 50pF, V = 3.3V, V = 0V
IH IL
V
OLV
CC
L
5. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW or LOW–to–HIGH. The remaining output is
measured in the LOW state.
MOTOROLA
4
MC74LCX2245
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Condition
= 3.3V, V = 0V or V
Typical
Unit
pF
C
C
C
Input Capacitance
V
V
7
8
IN
CC
I
CC
CC
Input/Output Capacitance
Power Dissipation Capacitance
= 3.3V, V = 0V or V
pF
I/O
PD
CC
I
10MHz, V
= 3.3V, V = 0V or V
I
25
pF
CC
CC
2.7V
0V
1.5V
1.5V
An, Bn
Bn, An
t
t
PHL
PLH
V
OH
OL
1.5V
1.5V
V
WAVEFORM 1 – PROPAGATION DELAYS
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns
t
R
F
W
2.7V
0V
1.5V
1.5V
OE, T/R
t
t
PHZ
PZH
V
V
CC
OH
– 0.3V
1.5V
1.5V
An, Bn
An, Bn
≈
0V
t
t
PLZ
PZL
≈
3.0V
V
GND
+ 0.3V
OL
WAVEFORM 2 – OUTPUT ENABLE AND DISABLE TIMES
t
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns
R
F
W
Figure 3. AC Waveforms
V
CC
6V
OPEN
GND
R
1
PULSE
GENERATOR
DUT
R
C
R
L
T
L
TEST
SWITCH
Open
6V
t , t
PLH PHL
t , t
PZL PLZ
Open Collector/Drain t
PLH
and t
PHL
6V
t
, t
GND
PZH PHZ
C
L
R
L
R
T
= 50pF or equivalent (Includes jig and probe capacitance)
= R = 500Ω or equivalent
1
OUT
= Z
of pulse generator (typically 50Ω)
Figure 4. Test Circuit
5
MOTOROLA
MC74LCX2245
OUTLINE DIMENSIONS
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D–04
ISSUE E
–A
–
NOTES:
1. DIMENSIONING AND TOLERANCING PER
20
11
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.150
(0.006) PER SIDE.
–B
–
P 10 PL
M
M
0.010 (0.25)
B
5. DIMENSION D DOES NOT INCLUDE
DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.13
(0.005) TOTAL IN EXCESS OF D DIMENSION
AT MAXIMUM MATERIAL CONDITION.
1
10
D 20 PL
J
M
S
S
MILLIMETERS
INCHES
0.010 (0.25)
T
A
B
DIM
A
B
C
D
MIN
12.65
7.40
2.35
0.35
0.50
MAX
12.95
7.60
2.65
0.49
0.90
MIN
MAX
0.510
0.299
0.104
0.019
0.035
0.499
0.292
0.093
0.014
0.020
F
F
R X 45°
G
J
K
1.27 BSC
0.050 BSC
0.25
0.10
0.32
0.25
0.010
0.004
0.012
0.009
C
M
P
R
0
°
7
°
0
°
7°
0.415
0.029
10.05
0.25
10.55
0.75
0.395
0.010
–T
M
–
SEATING
PLANE
K
G 18 PL
M SUFFIX
PLASTIC SOIC EIAJ PACKAGE
CASE 967–01
ISSUE O
NOTES:
1
DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2
3
CONTROLLING DIMENSION: MILLIMETER.
DIMENSIONS D AND E DO NOT INCLUDE MOLD
FLASH OR PROTRUSIONS AND ARE MEASURED
AT THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
L
E
20
11
Q
1
4
5
TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
E H
E
M
THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).
L
10
1
DETAIL P
Z
D
VIEW P
MILLIMETERS
INCHES
e
A
DIM
A
MIN
---
MAX
2.05
0.20
0.50
0.27
12.80
5.45
MIN
---
MAX
0.081
0.008
0.020
0.011
0.504
0.215
c
A
0.05
0.35
0.18
12.35
5.10
0.002
0.014
0.007
0.486
0.201
1
b
c
D
E
e
A
b
1
1.27 BSC
0.050 BSC
M
0.10 (0.004)
0.13 (0.005)
H
7.40
0.50
1.10
0
8.20
0.85
1.50
10
0.291
0.020
0.043
0
0.323
0.033
0.059
10
E
L
L
M
E
Q
Z
0.70
---
0.90
0.81
0.028
---
0.035
0.032
1
MOTOROLA
6
MC74LCX2245
OUTLINE DIMENSIONS
SD SUFFIX
PLASTIC SSOP PACKAGE
CASE 940C–03
NOTES:
13 DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
14 CONTROLLING DIMENSION: MILLIMETER.
15 DIMENSION A DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
16 DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
ISSUE B
20X K REF
0.12 (0.005)
M
S
S
T
U
V
0.25 (0.010)
N
20
11
10
L/2
17 DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION/INTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN
EXCESS OF K DIMENSION AT MAXIMUM
MATERIAL CONDITION. DAMBAR INTRUSION
SHALL NOT REDUCE DIMENSION K BY MORE
THAN 0.07 (0.002) AT LEAST MATERIAL
CONDITION.
18 TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
19 DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
M
N
B
L
F
PIN 1
IDENT
1
DETAIL E
K
–U–
A
–V–
J
J1
MILLIMETERS
INCHES
DIM
A
B
C
D
MIN
7.07
5.20
1.73
0.05
0.63
MAX
7.33
5.38
1.99
0.21
0.95
MIN
MAX
0.288
0.212
0.078
0.008
0.037
0.278
0.205
0.068
0.002
0.024
M
S
0.20 (0.008)
T U
K1
SECTION N–N
F
G
H
J
J1
K
K1
L
0.65 BSC
0.026 BSC
0.59
0.09
0.09
0.25
0.25
7.65
0
0.75
0.20
0.16
0.38
0.33
7.90
8
0.023
0.003
0.003
0.010
0.010
0.301
0
0.030
0.008
0.006
0.015
0.013
0.311
8
–W–
C
0.076 (0.003)
SEATING
PLANE
–T–
D
G
DETAIL E
M
H
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 948E–02
ISSUE A
20X K REF
0.10 (0.004)
NOTES:
6
DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
M
S
S
T
U
V
S
0.15 (0.006)
T U
7
8
CONTROLLING DIMENSION: MILLIMETER.
DIMENSION A DOES NOT INCLUDE MOLD FLASH,
PROTRUSIONS OR GATE BURRS. MOLD FLASH
OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
K
K1
20
11
2X L/2
9
DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED 0.25 (0.010)
PER SIDE.
J J1
B
L
–U–
PIN 1
IDENT
10 DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
11 TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
SECTION N–N
1
10
0.25 (0.010)
N
S
12 DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
0.15 (0.006)
T U
M
A
MILLIMETERS
INCHES
DIM
A
B
C
D
MIN
6.40
4.30
–––
0.05
0.50
MAX
6.60
4.50
1.20
0.15
0.75
MIN
MAX
0.260
0.177
0.047
0.006
0.030
–V–
0.252
0.169
–––
0.002
0.020
N
F
F
G
H
J
J1
K
K1
L
0.65 BSC
0.026 BSC
DETAIL E
0.27
0.09
0.09
0.19
0.19
0.37
0.20
0.16
0.30
0.25
0.011
0.004
0.004
0.007
0.007
0.015
0.008
0.006
0.012
0.010
–W–
C
6.40 BSC
0.252 BSC
G
D
M
0
8
0
8
H
DETAIL E
0.100 (0.004)
–T– SEATING
PLANE
7
MOTOROLA
MC74LCX2245
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specificallydisclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
datasheetsand/orspecificationscananddovaryindifferentapplicationsandactualperformancemayvaryovertime. Alloperatingparameters,including“Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applicationsintended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
ordeathmayoccur. ShouldBuyerpurchaseoruseMotorolaproductsforanysuchunintendedorunauthorizedapplication,BuyershallindemnifyandholdMotorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and
Opportunity/Affirmative Action Employer.
are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
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MC74LCX2245/D
◊
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Low−Voltage CMOS Octal Buffer With 5 V−Tolerant Inputs and Outputs (3−State, Inverting)
ONSEMI
MC74LCX240DTR2
LVC/LCX/Z SERIES, DUAL 4-BIT DRIVER, INVERTED OUTPUT, PDSO20, PLASTIC, TSSOP-20
MOTOROLA
MC74LCX240DTR2G
Low−Voltage CMOS Octal Buffer With 5 V−Tolerant Inputs and Outputs (3−State, Inverting)
ONSEMI
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