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.
14
13
12
11
10
9
1
2
3
4
5
6
7
16
15
8
VCC
D2
D1
WA WB EW
Q1
ER
Q2
D3
D4
RB
RA
Q4
Q3 GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
D1 D4
Data Inputs
0.5 U.L.
0.25 U.L.
WA, WB
Write Address Inputs
0.5 U.L.
0.25 U.L.
EW
Write Enable (Active LOW) Input
1.0 U.L.
0.5 U.L.
RA, RB
Read Address Inputs
0.5 U.L.
0.25 U.L.
ER
Read Enable (Active LOW) Input
1.5 U.L.
0.75 U.L.
Q1 Q4
Outputs (Note b)
65 (25) U.L.
15 (7.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
A 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
VCC = PIN 16
GND = PIN 8
14
13
5
4
12
15 1 2 3
11 10 9 7 6
WA
WB
RA
RB
EW
ER
D1 D2 D3 D4
Q1 Q2 Q3 Q4
5-598
FAST AND LS TTL DATA
SN54/74LS670
LOGIC DIAGRAM
14
1
2
6
7
3
4
5
9
11
12
10
13
15
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
G
D
Q
WORD
0
WORD
1
WORD
2
WORD
3
D4
D3
D2
D1
Q4
Q3
Q2
Q1
RA
ER
RB
WA
WB
EW
5-599
FAST AND LS TTL DATA
SN54/74LS670
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
TA
Operating Ambient Temperature Range
54
74
55
0
25
25
125
70
C
IOH
Output Current -- High
54
74
1.0
2.6
mA
IOL
Output Current -- Low
54
74
12
24
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
VIH
Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
VIL
Input LOW Voltage
54
0.7
V
Guaranteed Input LOW Voltage for
All Inputs
VIL
Input LOW Voltage
74
0.8
V
Guaranteed Input LOW Voltage for
All Inputs
VIK
Input Clamp Diode Voltage
0.65
1.5
V
VCC = MIN, IIN = 18 mA
VOH
Output HIGH Voltage
54
2.4
3.4
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOH
Output HIGH Voltage
74
2.4
3.1
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
0.25
0.4
V
IOL = 12 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VOL
Output LOW Voltage
74
0.35
0.5
V
IOL = 24 mA
VIN = VIL or VIH
per Truth Table
IOZH
Output Off Current HIGH
20
A
VCC = MAX, VO = 2.7 V
IOZL
Output Off Current LOW
20
A
VCC = MAX, VO = 0.4 V
IIH
Input HIGH Current
D, R, W
EW
ER
20
40
60
A
VCC = MAX, VIN = 2.7 V
IIH
D, R, W
EW
ER
0.1
0.2
0.3
mA
VCC = MAX, VIN = 7.0 V
IIL
Input LOW Current
D, R, W
EW
ER
0.4
0.8
1.2
mA
VCC = MAX, VIN = 0.4 V
IOS
Short Circuit Current (Note 1)
30
130
mA
VCC = MAX
ICC
Power Supply Current
50
mA
VCC = MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
5-600
FAST AND LS TTL DATA
SN54/74LS670
AC CHARACTERISTICS
(TA = 25
C)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tPLH
tPHL
Propagation Delay, RA or RB
to Output
23
25
40
45
ns
VCC = 5.0 V,
CL = 45 pF
tPLH
tPHL
Propagation Delay, EW to
Output
26
28
45
50
ns
VCC = 5.0 V,
CL = 45 pF
tPLH
tPHL
Propagation Delay, Data
to Output
25
23
45
40
ns
VCC = 5.0 V,
CL = 45 pF
tPZH
tPZL
Output Enable Time
15
22
35
40
ns
tPLZ
tPHZ
Output Disable Time
16
30
35
50
ns
CL = 5.0 pF
AC SETUP REQUIREMENTS
(TA = 25
C)
Symbol
Parameter
Limits
Unit
Test Conditions
Symbol
Parameter
Min
Typ
Max
Unit
Test Conditions
tW
Pulse Width
25
ns
VCC = 5.0 V
ts
Setup Time, (D)
10
ns
VCC = 5.0 V
ts
Setup Time, (W)
15
ns
VCC = 5.0 V
th
Hold Time, (D)
15
ns
VCC = 5.0 V
th
Hold Time, (W)
5.0
ns
trec
Recovery Time
25
ns
AC WAVEFORMS
Figure 1
Figure 2
Figure 3
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
1.3 V
RA, RB
Q
Q
D, EW
WA, WB
D
EW
ts
th
th
ts
tW
tPHL
tPLH
tPHL
tPLH
5-601
FAST AND LS TTL DATA
MIN
MIN
MAX
MAX
MILLIMETERS
INCHES
DIM
A
B
C
D
F
G
J
K
M
P
R
9.80
3.80
1.35
0.35
0.40
0.19
0.10
0
5.80
0.25
10.00
4.00
1.75
0.49
1.25
0.25
0.25
7
6.20
0.50
0.386
0.150
0.054
0.014
0.016
0.008
0.004
0
0.229
0.010
0.393
0.157
0.068
0.019
0.049
0.009
0.009
7
0.244
0.019
1.27 BSC
0.050 BSC
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. 751B 01 IS OBSOLETE, NEW STANDARD
751B 03.
1
8
9
16
-A-
-B-
P
16 PL
D
-T-
K
C
G
M
R X 45
F
J
8 PL
SEATING
PLANE
Case 751B-03 D Suffix
16-Pin Plastic
SO-16
B
0.25 (0.010)
M
M
T
0.25 (0.010)
B
A
M
S
S
Case 648-08 N Suffix
16-Pin Plastic
MIN
MIN
MAX
MAX
MILLIMETERS
INCHES
DIM
A
B
C
D
F
G
H
J
K
L
M
S
18.80
6.35
3.69
0.39
1.02
0.21
2.80
7.50
0
0.51
19.55
6.85
4.44
0.53
1.77
0.38
3.30
7.74
10
1.01
0.740
0.250
0.145
0.015
0.040
0.008
0.110
0.295
0
0.020
0.770
0.270
0.175
0.021
0.070
0.015
0.130
0.305
10
0.040
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L" TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B" DOES NOT INCLUDE MOLD
FLASH.
5. ROUNDED CORNERS OPTIONAL.
6. 648 01 THRU 07 OBSOLETE, NEW STANDARD
648 08.
2.54 BSC
1.27 BSC
0.100 BSC
0.050 BSC
-A-
B
1
8
9
16
F
H
G
D
16 PL
S
C
-T-
SEATING
PLANE
K
J
M
L
T A
0.25 (0.010)
M
M
Case 620-09 J Suffix
16-Pin Ceramic Dual In-Line
MIN
MIN
MAX
MAX
MILLIMETERS
INCHES
DIM
19.05
6.10
0.39
1.40
0.23
0
0.39
19.55
7.36
4.19
0.53
1.77
0.27
5.08
15
0.88
0.750
0.240
0.015
0.055
0.009
0
0.015
0.770
0.290
0.165
0.021
0.070
0.011
0.200
15
0.035
1.27 BSC
2.54 BSC
7.62 BSC
0.050 BSC
0.100 BSC
0.300 BSC
A
B
C
D
E
F
G
J
K
L
M
N
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.
4. DIM F MAY NARROW TO 0.76 (0.030) WHERE
THE LEAD ENTERS THE CERAMIC BODY.
5. 620 01 THRU 08 OBSOLETE, NEW STANDARD
620 09.
-B-
-A-
16 PL
-T-
C
D
E
F
G
J
K
M
N
SEATING
PLANE
16 PL
L
16
9
1
8
0.25 (0.010)
T A
M
S
0.25 (0.010)
T B
M
S
5-602
FAST AND LS TTL DATA
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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different
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associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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