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PDF MC74AC373 Data sheet ( Hoja de datos )
| Número de pieza | MC74AC373 | |
| Descripción | Octal Transparent Latch | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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MC74AC373, MC74ACT373
Octal Transparent Latch
with 3-State Outputs
The MC74AC373/74ACT373 consists of eight latches with 3−state
outputs for bus organized system applications. The flip−flops appear
transparent to the data when Latch Enable (LE) is HIGH. When LE is
LOW, the data that meets the setup time is latched. Data appears on the
bus when the Output Enable (OE) is LOW. When OE is HIGH, the bus
output is in the high impedance state.
Features
• Eight Latches in a Single Package
• 3−State Outputs for Bus Interfacing
• Outputs Source/Sink 24 mA
• ′ACT373 Has TTL Compatible Inputs
• These are Pb−Free Devices
VCC O7 D7 D6 O6 O5 D5 D4 O4 LE
20 19 18 17 16 15 14 13 12 11
www.onsemi.com
SOIC−20W
DW SUFFIX
CASE 751D
1
TSSOP−20
DT SUFFIX
CASE 948E
1
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 8 of this data sheet.
1 2 3 4 5 6 7 8 9 10
OE O0 D0 D1 O1 O2 D2 D3 O3 GND
Figure 1. Pinout: 20−Lead Packages Conductors
(Top View)
DEVICE MARKING INFORMATION
See general marking information in the device marking
section on page 9 of this data sheet.
PIN ASSIGNMENT
PIN FUNCTION
D0−D7
LE
Data Inputs
Latch Enable Input
OE Output Enable Input
O0−O7
3−State Latch Outputs
D0 D1 D2 D3 D4 D5 D6 D7
LE
OE
O0 O1 O2 O3 O4 O5 O6 O7
Figure 2. Logic Symbol
© Semiconductor Components Industries, LLC, 2015
February, 2015 − Rev. 9
1
Publication Order Number:
MC74AC373/D
1 page  
MC74AC373, MC74ACT373
AC CHARACTERISTICS (For Figures and Waveforms − See AND8277/D at www.onsemi.com)
74AC
74AC
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
Min Typ Max
TA = −40°C
to +85°C
CL = 50 pF
Min Max
tPLH
tPHL
tPLH
tPHL
tPZH
Propagation Delay
Dn to On
Propagation Delay
Dn to On
Propagation Delay
LE to On
Propagation Delay
LE to On
Output Enable Time
3.3 1.5
5.0 1.5
3.3 1.5
5.0 1.5
3.3 1.5
5.0 1.5
3.3 1.5
5.0 1.5
3.3 1.5
5.0 1.5
10 13.5 1.5
15
7.0 9.5 1.5 10.5
9.5 13 1.5 14.5
7.0 9.5 1.5 10.5
10 13.5 1.5
15
7.5 9.5 1.5 10.5
9.5 12.5 1.5
14
7.0 9.5 1.5 10.5
9.0 11.5 1.0
7.0 8.5 1.0
13
9.5
tPZL Output Enable Time
3.3 1.5
5.0 1.5
8.5 11.5 1.0
6.5 8.5 1.0
13
9.5
tPHZ
Output Disable Time
3.3 1.5
5.0 1.5
10 12.5 1.0 14.5
8.0 11 1.0 12.5
tPLZ Output Disable Time
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
3.3 1.5
5.0 1.5
8.0 11.5 1.0 12.5
6.5 8.5 1.0 10
Unit
ns
ns
ns
ns
ns
ns
ns
ns
Fig.
No.
3−5
3−5
3−6
3−6
3−7
3−8
3−7
3−8
AC OPERATING REQUIREMENTS
Symbol
Parameter
Setup Time, HIGH or LOW
ts Dn to LE
Hold Time, HIGH or LOW
th Dn to LE
tw LE Pulse Width, HIGH
*Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
VCC*
(V)
3.3
5.0
3.3
5.0
3.3
5.0
74AC
74AC
TA = +25°C
CL = 50 pF
TA = −40°C
to +85°C
CL = 50 pF
Typ Guaranteed Minimum
3.5 5.5
2.0 4.0
6.0
4.5
−3.0 1.0
−1.5 1.0
1.0
1.0
4.0 5.5
2.0 4.0
6.0
4.5
Unit
ns
ns
ns
Fig.
No.
3−9
3−9
3−6
www.onsemi.com
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