74LS670
器件描述：4 x 4 REGISTER FILE WITH 3-STATE OUTPUTS
器件厂商：MOTOROLA [Motorola, Inc]
文件大小：202.83KB，共6页
Sponsor by e络盟器件资料摘要：
5-597
FAST AND LS TTL DATA
4 x 4 REGISTER FILE
WITH 3-STATE OUTPUTS
The TTL /MSI SN54 /74LS670 is a high-speed, low-power 4 x 4 Register
File organized as four words by four bits. Separate read and write inputs, both
address and enable, allow simultaneous read and write operation.
The 3-state outputs make it possible to connect up to 128 outputs to in-
crease the word capacity up to 512 words. Any number of these devices can
be operated in parallel to generate an n-bit length.
The SN54/74LS170 provides a similar function to this device but it features
open-collector outputs.
• Simultaneous Read/Write Operation
• Expandable to 512 Words by n-Bits
• Typical Access Time to 20 ns
• 3-State Outputs for Expansion
• Typical Power Dissipation of 125 mW
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
C0049C0052 C0049C0051 C0049C0050 C0049C0049 C0049C0048 C0057
C0049 C0050 C0051 C0052 C0053 C0054 C0055
C0049C0054 C0049C0053
C0056
C0086
C0067C0067
C0068
C0050
C0068
C0049
C0087
C0065
C0087
C0066
C0069
C0087
C0081
C0049
C0069
C0082
C0081
C0050
C0068
C0051
C0068
C0052
C0082
C0066
C0082
C0065
C0081
C0052
C0081
C0051
C0071C0078C0068
PIN NAMES LOADING (Note a)
HIGH LOW
D
1
– D
4
Data Inputs 0.5 U.L. 0.25 U.L.
W
A
, W
B
Write Address Inputs 0.5 U.L. 0.25 U.L.
E
W
Write Enable (Active LOW) Input 1.0 U.L. 0.5 U.L.
R
A
, R
B
Read Address Inputs 0.5 U.L. 0.25 U.L.
E
R
Read Enable (Active LOW) Input 1.5 U.L. 0.75 U.L.
Q
1
– Q
4
Outputs (Note b) 65 (25) U.L. 15 (7.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 7.5 U.L. for Military (54) and 15 U.L. for Commercial
(74) Temperature Ranges. The Output HIGH drive factor is 25 U.L. for Military and
65 U.L. for Commercial Temperature Ranges.
SN54/74LS670
4 x 4 REGISTER FILE
WITH 3-STATE OUTPUTS
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
C0049C0052
C0049C0051
C0053
C0052
C0049C0050 C0049C0053 C0049 C0050 C0051
C0049C0049 C0049C0048 C0057 C0055 C0054
C0087
C0065
C0087
C0066
C0082
C0065
C0082
C0066
C0069
C0087
C0069
C0082
C0068
C0049
C0068
C0050
C0068
C0051
C0068
C0052
C0081
C0049
C0081
C0050
C0081
C0051
C0081
C0052
FAST AND LS TTL DATA
4 x 4 REGISTER FILE
WITH 3-STATE OUTPUTS
The TTL /MSI SN54 /74LS670 is a high-speed, low-power 4 x 4 Register
File organized as four words by four bits. Separate read and write inputs, both
address and enable, allow simultaneous read and write operation.
The 3-state outputs make it possible to connect up to 128 outputs to in-
crease the word capacity up to 512 words. Any number of these devices can
be operated in parallel to generate an n-bit length.
The SN54/74LS170 provides a similar function to this device but it features
open-collector outputs.
• Simultaneous Read/Write Operation
• Expandable to 512 Words by n-Bits
• Typical Access Time to 20 ns
• 3-State Outputs for Expansion
• Typical Power Dissipation of 125 mW
CONNECTION DIAGRAM DIP (TOP VIEW)
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
C0049C0052 C0049C0051 C0049C0050 C0049C0049 C0049C0048 C0057
C0049 C0050 C0051 C0052 C0053 C0054 C0055
C0049C0054 C0049C0053
C0056
C0086
C0067C0067
C0068
C0050
C0068
C0049
C0087
C0065
C0087
C0066
C0069
C0087
C0081
C0049
C0069
C0082
C0081
C0050
C0068
C0051
C0068
C0052
C0082
C0066
C0082
C0065
C0081
C0052
C0081
C0051
C0071C0078C0068
PIN NAMES LOADING (Note a)
HIGH LOW
D
1
– D
4
Data Inputs 0.5 U.L. 0.25 U.L.
W
A
, W
B
Write Address Inputs 0.5 U.L. 0.25 U.L.
E
W
Write Enable (Active LOW) Input 1.0 U.L. 0.5 U.L.
R
A
, R
B
Read Address Inputs 0.5 U.L. 0.25 U.L.
E
R
Read Enable (Active LOW) Input 1.5 U.L. 0.75 U.L.
Q
1
– Q
4
Outputs (Note b) 65 (25) U.L. 15 (7.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 7.5 U.L. for Military (54) and 15 U.L. for Commercial
(74) Temperature Ranges. The Output HIGH drive factor is 25 U.L. for Military and
65 U.L. for Commercial Temperature Ranges.
SN54/74LS670
4 x 4 REGISTER FILE
WITH 3-STATE OUTPUTS
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
C0049C0052
C0049C0051
C0053
C0052
C0049C0050 C0049C0053 C0049 C0050 C0051
C0049C0049 C0049C0048 C0057 C0055 C0054
C0087
C0065
C0087
C0066
C0082
C0065
C0082
C0066
C0069
C0087
C0069
C0082
C0068
C0049
C0068
C0050
C0068
C0051
C0068
C0052
C0081
C0049
C0081
C0050
C0081
C0051
C0081
C0052