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參數(shù)資料
| 型號(hào)： | MC74F245 |
| 廠商： | Motorola, Inc. |
| 英文描述： | OCTAL BIDIRECTIONAL TRANSCEIVER WITH 3-STATE INPUTS/OUTPUTS |
| 中文描述： | 八路雙向收發(fā)器具有三態(tài)輸入/輸出 |
| 文件頁數(shù)： | 2/2頁 |
| 文件大?。?/td> | 46K |
| 代理商： | MC74F245 |
4-116
FAST AND LS TTL DATA
MC54/74F245
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage
VIK
Input Clamp Diode Voltage
–1.2
V
IIN = –18 mA
VCC = MIN
VOH
Output HIGH Voltage, An Outputs
54, 74
2.4
3.3
V
IOH = –3.0 mA
VCC = 4.50 V
74
2.7
3.3
V
IOH = –3.0 mA
VCC = 4.75 V
54, 74
2.4
3.4
V
IOH = –3.0 mA
VCC = 4.50 V
VOH
Output HIGH Voltage, Bn Outputs
74
2.7
3.4
V
IOH = –3.0 mA
VCC = 4.75 V
54
2.0
V
IOH = –12 mA
VCC = 4.50 V
74
2.0
V
IOH = –15 mA
VOL
Output LOW Voltage, An Outputs
54
0.35
0.5
V
IOL = 20 mA
VCC = MIN
74
0.35
0.5
V
IOL = 24 mA
VOL
Output LOW Voltage, Bn Outputs
54
0.55
V
IOL = 48 mA
VCC = MIN
74
0.55
V
IOL = 64 mA
IOZH + IIH
Output Off Current HIGH
70
μ
A
VOUT = 2.7 V
VCC = MAX
IOZL + IIL
Output Off Current LOW
–650
mA
VOUT = 0.5 V
VCC = MAX
OE, T/R Inputs
20
μ
A
VIN = 2.7 V
IIH
Input HIGH Current
OE, T/R Inputs
100
μ
A
VIN = 7.0 V
VCC = MAX
An, Bn Inputs
1.0
mA
VIN = 5.5 V
T/R Input
–0.8
mA
IIL
Input LOW Current
OE Input
–1.2
mA
VIN = 0.5 V
VCC = MAX
IOS
Output Short Circuit
An Outputs
–60
–150
mA
VOUT = GND
VCC = MAX
Current (Note 2)
Bn Outputs
–100
–225
mA
VOUT = GND
VCC = MAX
ICCH
Power Supply Current HIGH
90
mA
VCC = MAX, Outputs HIGH
ICCL
Power Supply Current LOW
120
mA
VCC = MAX, Outputs LOW
ICCZ
Power Supply Current OFF
110
mA
VCC = MAX, Outputs OFF
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time.
AC CHARACTERISTICS
54/74F
54F
74F
TA = +25
°
C
TA = -55
°
C to +125
°
C
VCC = 5.0 V
±
10%
TA = 0
°
C to +70
°
C
VCC = 5.0 V
±
10%
VCC = +5.0 V
CL = 50 pF
CL = 50 pF
CL = 50 pF
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Unit
tPLH
tPHL
Propagation Delay
An to Bn or Bn to An
2.5
2.5
6.0
6.0
2.5
2.5
8.0
8.0
2.5
2.5
7.0
7.0
ns
tPZH
tPZL
Output Enable Time
3.0
3.5
7.0
8.0
3.0
3.5
9.0
10
3.0
3.5
8.0
9.0
ns
tPHZ
tPLZ
Output Disable Time
2.5
2.0
6.5
6.5
2.5
2.0
8.5
8.5
2.5
2.0
7.5
7.5
ns
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