SN54LS170 [MOTOROLA]
4 x 4 REGISTER FILE OPEN-COLLECTOR; 4× 4寄存器文件集电极开路
| 型号： | SN54LS170 |
| 厂家： | 
MOTOROLA |
| 描述： | 4 x 4 REGISTER FILE OPEN-COLLECTOR |
| 文件： | 总4页 (文件大小：111K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54/74LS170
4 x 4 REGISTER FILE
OPEN-COLLECTOR
The TTL/MSI SN54/74LS170 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.
Open-collector outputs make it possible to connect up to 128 outputs in a
wired-AND configuration to increase the word capacity up to 512 words. Any
number of these devices can be operated in parallel to generate an n-bit
length.
4 x 4 REGISTER FILE
OPEN-COLLECTOR
LOW POWER SCHOTTKY
The SN54/74LS670 provides a similar function to this device but it features
3-state outputs.
• Simultaneous Read/Write Operation
• Expandable to 512 Words of n-Bits
• Typical Access Time of 20 ns
• Low Leakage Open-Collector Outputs for Expansion
• Typical Power Dissipation of 125 mW
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
CONNECTION DIAGRAM DIP (TOP VIEW)
16
V
D
W
W
E
E
Q
Q
2
CC
16
1
A
B
W
R
1
1
15
14
13
12
11
10
9
NOTE:
D SUFFIX
SOIC
CASE 751B-03
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
16
1
1
2
3
4
5
6
8
7
ORDERING INFORMATION
D
D
D
R
R
Q
Q
3
GND
2
3
4
B
A
4
SN54LSXXXJ
Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
PIN NAMES
LOADING (Note a)
LOGIC SYMBOL
HIGH
LOW
D –D
Data Inputs
Write Address Inputs
Write Enable (Active LOW) Input
Read Address Inputs
Read Enable (Active LOW) Input
Outputs (Note b)
0.5 U.L.
0.5 U.L.
1.0 U.L.
0.5 U.L.
1.0 U.L.
0.25 U.L.
0.25 U.L.
0.5 U.L.
0.25 U.L.
0.5 U.L.
12
15
1
2
3
1
4
B
W , W
A
W
E
14
13
W
E
D
D
D
D
A
W
1
2
3
R , R
4
A
B
W
B
E
R
R
B
5
4
Q –Q
1
Open-Collector
5 (2.5) U.L.
A
4
R
E
Q
Q
Q Q
R
1
2 3 4
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)
b. Temperature Ranges. The Output HIGH drive must be supplied by an external resistor to V
11
10
9
7
6
.
CC
V
= PIN 16
CC
GND = PIN 8
FAST AND LS TTL DATA
5-1
SN54/74LS170
LOGIC DIAGRAM
D
D
D
1
D
2
3
4
3
2
1
15
12
13
E
W
W
B
W
A
14
WORD
0
G
G
G
G
D
D
D
D
G
G
G
D
G
G
G
G
D
D
D
D
G
G
G
G
D
D
D
Q
Q
Q
Q
Q
Q
WORD
1
D
Q
Q
WORD
2
D
D
Q
Q
Q
Q
Q
Q
Q
Q
WORD
3
G
D
4
R
B
11
5
E
R
R
A
6
7
9
10
Q
Q
Q
Q
1
4
3
2
V
= PIN 16
CC
GND = PIN 8
= PIN NUMBERS
FAST AND LS TTL DATA
5-2
SN54/74LS170
WRITE FUNCTION TABLE (SEE NOTES A, B, AND C)
READ FUNCTION TABLE (SEE NOTES A AND D)
WRITE INPUTS
WORD
READ INPUTS
OUTPUTS
W
B
W
A
E
W
0
1
2
3
R
R
E
R
Q
Q
Q
Q
4
B
A
1
2
3
L
L
H
L
H
X
L
L
L
L
H
Q = D
Q
Q = D
Q
Q
Q
Q
Q
Q = D
Q
Q
Q
Q
Q
Q = D
Q
L
L
H
L
H
X
L
L
L
L
H
W0B1
W1B1
W2B1
W3B1
H
W0B2
W1B2
W2B2
W3B2
H
W0B3
W1B3
W2B3
W3B3
H
W0B4
W1B4
W2B4
W3B4
H
0
0
0
0
0
0
L
H
H
X
Q
Q
Q
Q
L
H
H
X
0
0
0
0
0
0
0
0
0
0
NOTES: A. H = HIGH Level. L = LOW Level, X = Irrelevant.
NOTES: B. (Q = D) = The four selected internal flip-flop outputs will assume the states applied to the four external data inputs.
NOTES: C. Q = the level of Q before the indicated input conditions were established.
0
NOTES: D. W
0B1
= The first bit of word 0, etc.
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
V
CC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
T
A
Operating Ambient Temperature Range
54
74
–55
0
25
25
125
70
°C
V
Output Voltage — High
Output Current — Low
54, 74
5.5
V
OH
I
54
74
4.0
8.0
mA
OL
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Min
Typ
Max
Symbol
Parameter
Input HIGH Voltage
Unit
Test Conditions
Guaranteed Input HIGH Voltage for
All Inputs
V
2.0
V
IH
54
74
0.7
0.8
Guaranteed Input LOW Voltage for
All Inputs
V
V
Input LOW Voltage
V
IL
Input Clamp Diode Voltage
Output HIGH Current
–0.65
–1.5
100
V
V
V
= MIN, I = –18 mA
IN
IK
CC
I
54, 74
54, 74
µA
= MIN, V = MAX
OH
OH
CC
V
V
= V
MIN,
0.25
0.35
0.4
0.5
V
V
I
= 4.0 mA
= 8.0 mA
CC
IN
CC
OL
= V or V
V
OL
Output LOW Voltage
IL IH
74
I
OL
per Truth Table
Input HIGH Current
Any D, R, W
20
40
µA
V
CC
V
CC
= MAX, V = 2.4 V
IN
E , E
R
W
I
IH
Any D, R, W
E , E
0.1
0.2
mA
= MAX, V = 7.0 V
IN
R
W
Input LOW Current
Any D, R, W
–0.4
–0.8
I
I
mA
mA
V
V
= MAX, V = 0.4 V
IN
IL
CC
E , E
R
W
Power Supply Current
40
= MAX
CC
CC
FAST AND LS TTL DATA
5-3
SN54/74LS170
AC CHARACTERISTICS (T = 25°C)
A
Limits
Symbol
Parameter
Unit
Test Conditions
Min
Typ
Max
t
t
Propagation Delay, Negative-
20
20
30
30
PLH
PHL
ns
Figure 1
Figure 2
Figure 1
Figure 1
Going E to Q Outputs
R
t
t
Propagation Delay, R or R
A
25
24
40
40
PLH
PHL
B
ns
ns
ns
V
C
R
= 5.0 V
= 15 pF
= 2.0 kΩ
to Q Outputs
CC
L
L
t
t
Propagation Delay, Negative-
30
26
45
40
PLH
PHL
Going E to Q Outputs
W
t
t
Propagation Delay, Data Inputs
to Q Outputs
30
22
45
35
PLH
PHL
AC SETUP REQUIREMENTS (T = 25°C)
A
Limits
Typ
Symbol
Parameter
Pulse Width, E , E
Unit
ns
Test Conditions
Min
25
Max
t
t
t
t
t
t
W
R
W
Setup Time, Data to E
10
ns
s
W
Setup Time, W , W to E
15
ns
s
A
B
W
V
R
= 5.0 V
= 2.0 kΩ
CC
L
Hold Time, Data to E
15
ns
h
W
Hold Time, W , W to E
5.0
25
ns
h
A
B
W
Latch Time
ns
LATCH
VOLTAGE WAVEFORMS
3 V
3 V
WRITE-SELECT
INPUT W or W
DATA INPUT
D1, D2, D3 or D4
V
V
ref
ref
V
ref
A
B
0 V
3 V
0 V
t
0 V
3 V
su(W)
t
h(W)
DATA INPUT
D1, D2, D3 or D4
WRITE-ENABLE
V
V
V
ref
ref
ref
INPUT E
W
0 V
t
h(D)
t
PLH
t
PHL
t
WRITE-ENABLE
su(D)
V
OH
t
3 V
0 V
3 V
0 V
w
OUTPUT
Q1, Q2, Q3 or Q4
INPUT E
W
V
V
V
V
ref
ref
ref
ref
V
OL
t
latch
3 V
V
READ-SELECT
INPUT R or R
ref
V
ref
DATA INPUT
D1, D2, D3 or D4
V
A
B
ref
0 V
3 V
t
W
3 V
0 V
READ-ENABLE
V
V
ref
WRITE-ENABLE
INPUT E
ref
R
V
ref
t
INPUT E
W
t
0 V
3 V
PLH
t
t
PHL
OUTPUT
Q1, Q2, Q3 or Q4
PHL
PLH
V
OH
V
V
OUTPUT
Q1, Q2, Q3 or Q4
ref
ref
V
V
ref
ref
V
OL
t
PHL
0 V
t
PLH
Figure 1
Figure 2
FAST AND LS TTL DATA
5-4
相关型号：
©2020 ICPDF网 联系我们和版权申明