MC74LCX2245DT [ONSEMI]
IC,BUS TRANSCEIVER,SINGLE,8-BIT,LCX/LVC-CMOS,TSSOP,20PIN,PLASTIC;
| 型号： | MC74LCX2245DT |
| 厂家： | 
ONSEMI |
| 描述： | IC,BUS TRANSCEIVER,SINGLE,8-BIT,LCX/LVC-CMOS,TSSOP,20PIN,PLASTIC 光电二极管 |
| 文件： | 总8页 (文件大小：82K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Low-Voltage CMOS Octal
Transceiver
MC74LCX2245
With 5V–Tolerant Inputs and Outputs
(3–State, Non–Inverting)
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
performance. A V specification of 5.5V allows MC74LCX2245
LOW–VOLTAGE CMOS
OCTAL TRANSCEIVER
I
inputs to 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–05
• Designed for 2.7 to 3.6V V Operation
CC
• 5V Tolerant — Interface Capability With 5V TTL Logic
• Supports Live Insertion and Withdrawal
M SUFFIX
20–LEAD PLASTIC SOIC EIAJ
CASE 967–01
• I
Specification Guarantees High Impedance When V = 0V
OFF
CC
• LVTTL Compatible
• LVCMOS Compatible
DT SUFFIX
20–LEAD PLASTIC TSSOP
CASE 948E–02
• 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
• ESD Performance: Human Body Model >2000V; Machine Model >200V
PIN NAMES
V
OE
19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
CC
Pins
Function
20
OE
T/R
A0–A7
Output Enable Input
Transmit/Receive Input
Side A 3–State Inputs or 3–State
Outputs
B0–B7
Side B 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
Figure 1. 20–Lead Pinout
(Top View)
This document contains information on a new product. Specifications and information
herein are subject to change without notice.
Semiconductor Components Industries, LLC, 2001
1
Publication Order Number:
January, 2001 – Rev. 1
MC74LCX2245/D
MC74LCX2245
OE 19
T/R 1
2
A0
A1
A2
A3
A4
A5
A6
A7
18
17
16
15
14
13
12
11
B0
B1
B2
B3
B4
B5
B6
B7
3
4
5
6
7
8
9
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
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2
MC74LCX2245
ABSOLUTE MAXIMUM RATINGS*
Symbol
Parameter
Value
Condition
Unit
V
V
V
V
DC Supply Voltage
DC Input Voltage
DC Output Voltage
–0.5 to +7.0
CC
–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
V
O
CC
I
I
DC Input Diode Current
DC Output Diode Current
–50
V < GND
mA
mA
mA
mA
mA
mA
°C
IK
I
–50
+50
V < GND
O
OK
V
O
> V
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
*
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. I absolute maximum rating must be observed.
O
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
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
CC
HIGH Level Output Current, V = 2.7V – 3.0V
–8
CC
LOW Level Output Current, V = 2.7V – 3.0V
8
CC
T
A
Operating Free–Air Temperature
–40
0
+85
10
∆t/∆V
Input Transition Rise or Fall Rate, V from 0.8V to 2.0V,
ns/V
IN
V
CC
= 3.0V
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
2.7V ≤ V ≤ 3.6V
Min
2.0
Max
Unit
V
V
V
V
IH
CC
2.7V ≤ V ≤ 3.6V
0.8
V
IL
CC
2.7V ≤ V ≤ 3.6V; I = –100µA
V – 0.2
CC
V
OH
CC
OH
V
V
V
= 2.7V; I = –4mA
2.2
CC
CC
CC
OH
= 2.7V; I = –8mA
2.0
2.4
2.0
OH
= 3.0V; I = –6mA
OH
V
CC
= 3.0V; I = –12mA
OH
2. These values of V are used to test DC electrical characteristics only.
I
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3
MC74LCX2245
DC ELECTRICAL CHARACTERISTICS (continued)
T
A
= –40°C to +85°C
Symbol
Characteristic
Condition
2.7V ≤ V ≤ 3.6V; I = 100µA
Min
Max
0.2
Unit
V
OL
LOW Level Output Voltage
V
CC
OL
V
V
= 2.7V; I = 4mA
0.4
CC
CC
CC
OL
= 2.7V; I = 8mA
0.6
OL
V
= 3.0V; I = 6mA
0.55
0.8
OL
V
CC
= 3.0V; I = 12mA
OL
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
O
V = V or V
IL
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
Increase in I per Input
2.7 ≤ V ≤ 3.6V; V = V – 0.6V
CC IH CC
CC
CC
AC CHARACTERISTICS (Note 3., tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
Limits
T
A
= –40°C to +85°C
V
= 3.0V to 3.6V
Max
V
CC
= 2.7V
CC
Symbol
Parameter
Propagation Delay
Waveform
Min
Max
Unit
t
t
1
1.5
1.5
10.0
10.0
11.0
11.0
ns
PLH
Input to Output
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
); parameter
OSHL
OSLH
DYNAMIC SWITCHING CHARACTERISTICS
T
A
= +25°C
Typ
Symbol
Characteristic
Condition
= 3.3V, C = 50pF, V = 3.3V, V = 0V
Min
Max
Unit
V
OLP
Dynamic LOW Peak Voltage (Note
5.)
V
V
0.8
V
CC
L
IH
IL
V
OLV
Dynamic LOW Valley Voltage (Note
5.)
= 3.3V, C = 50pF, V = 3.3V, V = 0V
0.8
V
CC
L
IH
IL
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.
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4
MC74LCX2245
CAPACITIVE CHARACTERISTICS
Symbol
Parameter
Input Capacitance
Condition
Typical
Unit
pF
C
C
C
V
V
= 3.3V, V = 0V or V
7
8
IN
CC
I
CC
CC
Input/Output Capacitance
= 3.3V, V = 0V or V
pF
I/O
PD
CC
I
Power Dissipation Capacitance
10MHz, V = 3.3V, V = 0V or V
CC
25
pF
CC
I
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5
MC74LCX2245
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
- 0.3V
OH
1.5V
1.5V
An, Bn
An, Bn
≈ 0V
≈ 3.0V
t
t
PLZ
PZL
V + 0.3V
OL
GND
WAVEFORM 2 - OUTPUT ENABLE AND DISABLE TIMES
= t = 2.5ns, 10% to 90%; f = 1MHz; t = 500ns
t
R
F
W
Figure 3. AC Waveforms
V
CC
6V
OPEN
GND
R
1
PULSE
GENERATOR
DUT
R
T
C
L
R
L
TEST
SWITCH
Open
6V
t
t
, t
PLH PHL
, t
PZL PLZ
Open Collector/Drain t
and t
6V
PLH
PHL
t
, t
GND
PZH PHZ
C = 50pF or equivalent (Includes jig and probe capacitance)
L
R = R = 500Ω or equivalent
L
1
R = Z
of pulse generator (typically 50Ω)
T
OUT
Figure 4. Test Circuit
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6
MC74LCX2245
OUTLINE DIMENSIONS
DW SUFFIX
PLASTIC SOIC PACKAGE
CASE 751D–05
ISSUE E
D
A
q
NOTES:
1. DIMENSIONS ARE IN MILLIMETERS.
2. INTERPRET DIMENSIONS AND TOLERANCES
PER ASME Y14.5M, 1994.
20
11
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
PROTRUSION.
E
B
4. MAXIMUM MOLD PROTRUSION 0.15 PER SIDE.
5. DIMENSION B DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE PROTRUSION SHALL
BE 0.13 TOTAL IN EXCESS OF B DIMENSION AT
MAXIMUM MATERIAL CONDITION.
1
10
MILLIMETERS
DIM MIN
MAX
2.65
0.25
0.49
0.32
12.95
7.60
20X B
A
A1
B
C
D
E
2.35
0.10
0.35
0.23
12.65
7.40
M
S
S
B
0.25
T A
e
1.27 BSC
A
H
h
10.05
0.25
0.50
0
10.55
0.75
0.90
7
L
SEATING
PLANE
q
_
_
18X e
A1
C
T
M SUFFIX
PLASTIC SOIC EIAJ PACKAGE
CASE 967–01
ISSUE O
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. 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. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
E H
_
M
E
5. 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
MIN
ĆĆĆ
e
A
DIM MIN
MAX
2.05
MAX
0.081
0.008
0.020
0.011
0.504
0.215
c
A
A
ĆĆĆ
0.05
0.35
0.18
12.35
5.10
1
0.20 0.002
0.50 0.014
0.27 0.007
b
c
D
E
e
12.80 0.486
5.45 0.201
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
8.20 0.291
0.85 0.020
1.50 0.043
0.323
0.033
0.059
E
L
L
E
M
Q
Z
0
10
0.90 0.028
0
10
_
0.035
0.032
_
_
_
0.70
ĆĆĆ
1
0.81
ĆĆĆ
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7
MC74LCX2245
OUTLINE DIMENSIONS
DT SUFFIX
PLASTIC TSSOP PACKAGE
CASE 948E–02
ISSUE A
20X K REF
NOTES:
ąă1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
M
S
S
V
0.10 (0.004)
T
U
S
U
0.15 (0.006) T
ąă2. CONTROLLING DIMENSION: MILLIMETER.
ąă3. 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.
ąă4. DIMENSION B DOES NOT INCLUDE
INTERLEAD FLASH OR PROTRUSION.
INTERLEAD FLASH OR PROTRUSION SHALL NOT
EXCEED 0.25 (0.010) PER SIDE.
ąă5. 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.
K
K1
20
11
2X L/2
J J1
B
L
–U–
PIN 1
IDENT
SECTION N–N
1
10
0.25 (0.010)
ąă6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
N
S
ąă7. DIMENSION A AND B ARE TO BE
DETERMINED AT DATUM PLANE -W-.
0.15 (0.006) T
U
M
A
MILLIMETERS
INCHES
DIM MIN
MAX
6.60
4.50
1.20
0.15
0.75
MIN
MAX
0.260
0.177
0.047
0.006
0.030
–V–
A
B
6.40
4.30
---
0.252
0.169
---
N
C
D
0.05
0.50
0.002
0.020
F
F
G
H
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
J
–W–
J1
K
C
K1
L
6.40 BSC
0.252 BSC
0
G
D
M
0
8
8
_
_
_
_
H
DETAIL E
0.100 (0.004)
–T– SEATING
PLANE
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MC74LCX2245/D
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