74LS298
器件描述：QUAD 2-INPUT MULTIPLEXER WITH STORAGE
器件厂商：MOTOROLA [Motorola, Inc]
文件大小：187.98KB，共6页
Sponsor by e络盟器件资料摘要：
5-473
FAST AND LS TTL DATA
QUAD 2-INPUT MULTIPLEXER
WITH STORAGE
The SN54/74LS298 is a Quad 2-Port Register. It is the logical equivalent of
a quad 2-input multiplexer followed by a quad 4-bit edge-triggered register. A
Common Select input selects between two 4-bit input ports (data sources.)
The selected data is transferred to the output register synchronous with the
HIGH to LOW transition of the Clock input.
The LS298 is fabricated with the Schottky barrier process for high speed
and is completely compatible with all Motorola TTL families.
• Select From Two Data Sources
• Fully Edge-Triggered Operation
• Typical Power Dissipation of 65 mW
• Input Clamp Diodes Limit High Speed Termination Effects
C0049C0052 C0049C0051 C0049C0050 C0049C0049 C0049C0048 C0057
C0049 C0050 C0051 C0052 C0053 C0054 C0055
C0049C0054 C0049C0053
C0056
C0086
C0067C0067
C0073
C0049C0098
C0081
C0097
C0081
C0098
C0081
C0099
C0081
C0100
C0083C0067C0080 C0073
C0048C0099
C0073
C0049C0097
C0073
C0048C0097
C0073
C0048C0098
C0073
C0049C0099
C0073
C0049C0100
C0073
C0048C0100
C0071C0078C0068
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
PIN NAMES LOADING (Note a)
HIGH LOW
S Common Select Input 0.5 U.L. 0.25 U.L.
CP Clock (Active LOW Going Edge) Input 0.5 U.L. 0.25 U.L.
I
0a
–I
0d
Data Inputs From Source 0 0.5 U.L. 0.25 U.L.
I
1a
–I
1d
Data Inputs From Source 1 0.5 U.L. 0.25 U.L.
Q
a
–Q
d
Register Outputs (Note b) 10 U.L. 5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial
(74) Temperature Ranges.
SN54/74LS298
QUAD 2-INPUT MULTIPLEXER
WITH STORAGE
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
C0086
C0067C0067
C0061 C0080C0073C0078 C0049C0054
C0071C0078C0068 C0061 C0080C0073C0078 C0056
C0051 C0050 C0052 C0049 C0057 C0053 C0055 C0054
C0049C0053 C0049C0052 C0049C0051 C0049C0050
C0049C0048
C0049C0049
C0073
C0048C0097
C0073
C0049C0097
C0073
C0048C0098
C0073
C0049C0098
C0073
C0048C0099
C0073
C0049C0099
C0073
C0048C0100
C0073
C0049C0100
C0083
C0067C0080
C0081
C0097
C0081
C0098
C0081
C0099
C0081
C0100
FAST AND LS TTL DATA
QUAD 2-INPUT MULTIPLEXER
WITH STORAGE
The SN54/74LS298 is a Quad 2-Port Register. It is the logical equivalent of
a quad 2-input multiplexer followed by a quad 4-bit edge-triggered register. A
Common Select input selects between two 4-bit input ports (data sources.)
The selected data is transferred to the output register synchronous with the
HIGH to LOW transition of the Clock input.
The LS298 is fabricated with the Schottky barrier process for high speed
and is completely compatible with all Motorola TTL families.
• Select From Two Data Sources
• Fully Edge-Triggered Operation
• Typical Power Dissipation of 65 mW
• Input Clamp Diodes Limit High Speed Termination Effects
C0049C0052 C0049C0051 C0049C0050 C0049C0049 C0049C0048 C0057
C0049 C0050 C0051 C0052 C0053 C0054 C0055
C0049C0054 C0049C0053
C0056
C0086
C0067C0067
C0073
C0049C0098
C0081
C0097
C0081
C0098
C0081
C0099
C0081
C0100
C0083C0067C0080 C0073
C0048C0099
C0073
C0049C0097
C0073
C0048C0097
C0073
C0048C0098
C0073
C0049C0099
C0073
C0049C0100
C0073
C0048C0100
C0071C0078C0068
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
PIN NAMES LOADING (Note a)
HIGH LOW
S Common Select Input 0.5 U.L. 0.25 U.L.
CP Clock (Active LOW Going Edge) Input 0.5 U.L. 0.25 U.L.
I
0a
–I
0d
Data Inputs From Source 0 0.5 U.L. 0.25 U.L.
I
1a
–I
1d
Data Inputs From Source 1 0.5 U.L. 0.25 U.L.
Q
a
–Q
d
Register Outputs (Note b) 10 U.L. 5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial
(74) Temperature Ranges.
SN54/74LS298
QUAD 2-INPUT MULTIPLEXER
WITH STORAGE
LOW POWER SCHOTTKY
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
C0086
C0067C0067
C0061 C0080C0073C0078 C0049C0054
C0071C0078C0068 C0061 C0080C0073C0078 C0056
C0051 C0050 C0052 C0049 C0057 C0053 C0055 C0054
C0049C0053 C0049C0052 C0049C0051 C0049C0050
C0049C0048
C0049C0049
C0073
C0048C0097
C0073
C0049C0097
C0073
C0048C0098
C0073
C0049C0098
C0073
C0048C0099
C0073
C0049C0099
C0073
C0048C0100
C0073
C0049C0100
C0083
C0067C0080
C0081
C0097
C0081
C0098
C0081
C0099
C0081
C0100