MC74AC245ML1 [ROCHESTER]
IC,BUS TRANSCEIVER,SINGLE,8-BIT,AC-CMOS,SOP,20PIN,PLASTIC;
| 型号： | MC74AC245ML1 |
| 厂家： | 
Rochester Electronics |
| 描述： | IC,BUS TRANSCEIVER,SINGLE,8-BIT,AC-CMOS,SOP,20PIN,PLASTIC |
| 文件： | 总7页 (文件大小：756K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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The MC74AC245/74ACT245 contains eight non–inverting
bidirectional buffers with 3–state outputs and is intended for
bus–oriented applications. Current sinking capability is 24 mA at both
the A and B ports. The Transmit/Receive (T/R) input determines the
direction of data flow through the bidirectional transceiver. Transmit
(active–HIGH) enables data from A ports to B ports; Receive
(active–LOW) enables data from B ports to A ports. The Output
Enable input, when HIGH, disables both A and B ports by placing
them in a High Z condition.
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PDIP–20
N SUFFIX
CASE 738
20
1
SO–20
DW SUFFIX
CASE 751
20
• Noninverting Buffers
1
• Bidirectional Data Path
• A and B Outputs Source/Sink 24 mA
• ′ACT245 Has TTL Compatible Inputs
TSSOP–20
DT SUFFIX
CASE 948E
20
1
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EIAJ–20
M SUFFIX
CASE 967
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20
1
ORDERING INFORMATION
Device
Package
PDIP–20
PDIP–20
SOIC–20
Shipping
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MC74AC245N
18 Units/Rail
18 Units/Rail
38 Units/Rail
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MC74ACT245N
MC74AC245DW
MC74AC245DWR2
MC74ACT245DW
Figure 1.
SOIC–20 1000 Tape & Reel
SOIC–20 38 Units/Rail
PIN ASSIGNMENT
PIN
OE
T/R
FUNCTION
MC74ACT245DWR2 SOIC–20 1000 Tape & Reel
Output Enable Input
Transmit/Receive Input
MC74AC245DT
MC74AC245DTR2
MC74ACT245DT
TSSOP–20
TSSOP–20 2500 Tape & Reel
TSSOP–20 75 Units/Rail
75 Units/Rail
A –A
0
Side A 3–State Inputs or 3–State Outputs
Side B 3–State Inputs or 3–State Outputs
7
B –B
0
7
MC74ACT245DTR2 TSSOP–20 2500 Tape & Reel
TRUTH TABLES
Inputs
MC74AC245M
EIAJ–20
EIAJ–20 2000 Tape & Reel
EIAJ–20 40 Units/Rail
EIAJ–20 2000 Tape & Reel
40 Units/Rail
Outputs
MC74AC245MEL
MC74ACT245M
MC74ACT245MEL
OE T/R
L
L
H
L
H
X
Bus B Data to Bus A
Bus A Data to Bus B
High Z State
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 192 of this data sheet.
Semiconductor Components Industries, LLC, 2001
187
Publication Order Number:
May, 2001 – Rev. 5
MC74AC245/D
MC74AC245, MC74ACT245
MAXIMUM RATINGS*
Symbol
Parameter
Value
Unit
V
V
V
V
DC Supply Voltage (Referenced to GND)
–0.5 to +7.0
CC
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
–0.5 to V
+0.5
V
IN
CC
–0.5 to V
+0.5
V
OUT
CC
I
I
I
±20
mA
mA
mA
°C
IN
DC Output Sink/Source Current, per Pin
±50
±50
OUT
CC
DC V
or GND Current per Output Pin
Storage Temperature
CC
T
stg
–65 to +150
*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the
Recommended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
2.0
4.5
0
Typ
5.0
5.0
–
Max
6.0
Unit
′AC
V
V
Supply Voltage
V
V
CC
′ACT
5.5
, V
IN OUT
DC Input Voltage, Output Voltage (Ref. to GND)
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
@ 3.0 V
@ 4.5 V
@ 5.5 V
@ 4.5 V
@ 5.5 V
–
150
40
25
10
8.0
–
–
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
–
–
–
–
–
ns/V
t , t
r f
–
–
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
t , t
r f
ns/V
–
T
J
Junction Temperature (PDIP)
Operating Ambient Temperature Range
Output Current – High
–
140
85
°C
°C
T
A
–40
–
25
–
I
I
–24
24
mA
mA
OH
Output Current – Low
–
–
OL
1. V from 30% to 70% V ; see individual Data Sheets for devices that differ from the typical input rise and fall times.
IN
CC
2. V from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
IN
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188
MC74AC245, MC74ACT245
DC CHARACTERISTICS
Symbol
74AC
74AC
T
A
=
V
(V)
CC
T
= +25°C
–40°C to
+85°C
Parameter
Unit
Conditions
A
Typ
Guaranteed Limits
V
V
V
3.0
4.5
5.5
1.5
2.25
2.75
2.1
3.15
3.85
2.1
3.15
3.85
V
= 0.1 V
– 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
or V
CC
= 0.1 V
OUT
3.0
4.5
5.5
1.5
2.25
2.75
0.9
1.35
1.65
0.9
1.35
1.65
V
Maximum Low Level
Input Voltage
IL
or V
– 0.1 V
CC
3.0
4.5
5.5
2.99
4.49
5.49
2.9
4.4
5.4
2.9
4.4
5.4
I
= –50 µA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IN IL IH
3.0
4.5
5.5
–
–
–
2.56
3.86
4.86
2.46
3.76
4.76
–12 mA
–24 mA
–24 mA
V
V
V
I
OH
V
OL
3.0
4.5
5.5
0.002
0.001
0.001
0.1
0.1
0.1
0.1
0.1
0.1
I = 50 µA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN IL
IH
3.0
4.5
5.5
–
–
–
0.36
0.36
0.36
0.44
0.44
0.44
12 mA
I
24 mA
24 mA
OL
I
IN
Maximum Input
Leakage Current
5.5
5.5
–
–
±0.1
±0.6
±1.0
±6.0
µA
µA
V = V , GND
CC
I
I
V (OE) = V , V
IL IH
Maximum
3-State
Current
OZT
I
V = V , GND
I
CC
= V , GND
CC
V
O
I
I
I
5.5
5.5
–
–
–
–
75
mA
mA
V
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OHD
CC
OLD
OHD
–75
V
V
= 3.85 V Min
Maximum Quiescent
Supply Current
5.5
–
8.0
80.0
µA
= V or GND
CC
IN
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
NOTE:
I
IN
and I
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V V
.
CC
CC
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189
MC74AC245, MC74ACT245
AC CHARACTERISTICS (For Figures and Waveforms – See Section 3)
74AC
74AC
T
= –40°C
A
T
C
= +25°C
= 50 pF
V
(V)
*
Fig.
No.
A
L
CC
to +85°C
C
Symbol
Parameter
Unit
= 50 pF
L
Min
Typ
Max
Min
Max
Propagation Delay
to B or B to A
3.3
5.0
1.5
1.5
5.0
3.5
8.5
6.5
1.0
1.0
9.0
7.0
t
t
t
t
t
t
ns
ns
ns
ns
ns
ns
3–5
3–5
3–7
3–8
3–7
3–8
PLH
A
n
n
n
n
Propagation Delay
to B or B to A
3.3
5.0
1.5
1.5
5.0
3.5
8.5
6.0
1.0
1.0
9.0
7.0
PHL
PZH
PZL
PHZ
PLZ
A
n
n
n
n
3.3
5.0
2.5
1.5
7.0
5.0
11.5
8.5
2.0
1.0
12.5
9.0
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
3.3
5.0
2.5
1.5
7.5
5.5
12.0
9.0
2.0
1.0
13.5
9.5
3.3
5.0
2.0
1.5
6.5
5.5
12.0
9.0
1.0
1.0
12.5
10.0
3.3
5.0
2.0
1.5
7.0
5.5
11.5
9.0
1.5
1.0
13.0
10.0
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
DC CHARACTERISTICS
74ACT
74ACT
T
=
A
V
(V)
CC
T
A
= +25°C
–40°C to
+85°C
Symbol
Parameter
Unit
Conditions
Typ
Guaranteed Limits
V
V
V
4.5
5.5
1.5
1.5
2.0
2.0
2.0
2.0
V
or V
= 0.1 V
Minimum High Level
Input Voltage
IH
OUT
V
V
V
– 0.1 V
CC
4.5
5.5
1.5
1.5
0.8
0.8
0.8
0.8
V
OUT
= 0.1 V
Maximum Low Level
Input Voltage
IL
or V
– 0.1 V
CC
4.5
5.5
4.49
5.49
4.4
5.4
4.4
5.4
I
= –50 µA
Minimum High Level
Output Voltage
OH
OUT
*V = V or V
IN IL IH
4.5
5.5
–
–
3.86
4.86
3.76
4.76
V
V
V
–24 mA
–24 mA
I
OH
V
OL
4.5
5.5
0.001
0.001
0.1
0.1
0.1
0.1
I = 50 µA
OUT
Maximum Low Level
Output Voltage
*V = V or V
IN IL
IH
4.5
5.5
–
–
0.36
0.36
0.44
0.44
24 mA
24 mA
I
OL
I
IN
Maximum Input
Leakage Current
5.5
5.5
–
±0.1
±1.0
µA
V = V , GND
I
CC
∆I
CCT
Additional Max. I /Input
CC
0.6
–
1.5
mA
V = V
– 2.1 V
I
CC
I
V (OE) = V , V
IL IH
Maximum
3–State
Current
OZT
I
5.5
–
±0.6
±6.0
µA
V = V , GND
I
CC
V
O
= V , GND
CC
I
I
I
5.5
5.5
–
–
–
–
75
mA
mA
V
= 1.65 V Max
†Minimum Dynamic
Output Current
OLD
OLD
OHD
–75
V
V
= 3.85 V Min
OHD
CC
Maximum Quiescent
Supply Current
5.5
–
8.0
80.0
µA
= V or GND
CC
IN
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
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190
MC74AC245, MC74ACT245
AC CHARACTERISTICS (For Figures and Waveforms – See Section 3)
74ACT
74ACT
= –40°C
T
A
T
C
= +25°C
= 50 pF
V
(V)
*
Fig.
No.
A
CC
to +85°C
Symbol
Parameter
Unit
L
C
= 50 pF
L
Min
Typ
Max
Min
Max
Propagation Delay
to B or B to A
t
t
5.0
5.0
1.5
4.0
7.5
1.5
8.0
9.0
ns
ns
3–5
3–5
PLH
A
n
n
n
n
Propagation Delay
to B or B to A
1.5
4.0
8.0
1.0
PHL
A
n
n
n
n
t
t
t
t
Output Enable Time
Output Enable Time
Output Disable Time
Output Disable Time
5.0
5.0
5.0
5.0
1.5
1.5
1.5
2.0
5.0
5.5
5.5
5.0
10
10
10
10
1.5
1.5
1.0
1.5
11.0
12.0
11.0
11.0
ns
ns
ns
ns
3–7
3–8
3–7
3–8
PZH
PZL
PHZ
PLZ
*Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol
Value
Typ
Parameter
Unit
Test Conditions
C
C
C
Input Capacitance
4.5
15
45
pF
pF
pF
V
CC
V
CC
V
CC
= 5.0 V
= 5.0 V
= 5.0 V
IN
Input/Output Capacitance
I/O
PD
Power Dissipation Capacitance
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191
MC74AC245, MC74ACT245
MARKING DIAGRAMS
PDIP–20
SO–20
TSSOP–20
EIAJ–20
AC245
AWLYYWW
MC74AC245N
AWLYYWW
74AC245
AWLYWW
AC
245
ALYW
ACT245
AWLYYWW
MC74ACT245N
AWLYYWW
74ACT245
AWLYWW
ACT
245
ALYW
A
= Assembly Location
WL, L = Wafer Lot
YY, Y
= Year
WW, W = Work Week
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192
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