3-STATE OUTPUTS. SN54LS670 Datasheet

SN54LS670 OUTPUTS. Datasheet pdf. Equivalent

SN54LS670 Datasheet
Recommendation SN54LS670 Datasheet
Part SN54LS670
Description 4 x 4 REGISTER FILE WITH 3-STATE OUTPUTS
Feature SN54LS670; SN54/74LS670 4 x 4 REGISTER FILE WITH 3-STATE OUTPUTS The TTL / MSI SN54 / 74LS670 is a high-speed, .
Manufacture Motorola Inc
Datasheet
Download SN54LS670 Datasheet




Motorola  Inc SN54LS670
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)
VCC D1 WA WB EW ER Q1 Q2
16 15 14 13 12 11 10 9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1 2 3 4 56 78
D2 D3 D4 RB RA Q4 Q3 GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
D1 – D4
WA, WB
EW
RA, RB
ER
Q1 – Q4
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.
1.5 U.L.
65 (25) U.L.
0.25 U.L.
0.25 U.L.
0.5 U.L.
0.25 U.L.
0.75 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
16
1
16
1
16
1
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
12 15 1 2 3
14 WA EW D1 D2 D3 D4
13 WB
5 RA
4 RB ER Q1 Q2 Q3 Q4
11 10 9 7 6
VCC = PIN 16
GND = PIN 8
FAST AND LS TTL DATA
5-597



Motorola  Inc SN54LS670
12
EW
13
WB
14
WA
4
RB
11
ER
5
RA
SN54 / 74LS670
LOGIC DIAGRAM
D4
3
D3
2
D2
1
D1
15
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
GD
Q
WORD
0
GD
Q
WORD
1
GD
Q
WORD
2
GD
Q
WORD
3
GD
Q
6
Q4
7
Q3
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
FAST AND LS TTL DATA
5-598
9
Q2
10
Q1



Motorola  Inc SN54LS670
SN54 / 74LS670
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA Operating Ambient Temperature Range
IOH Output Current — High
IOL Output Current — Low
Min Typ Max Unit
54 4.5 5.0 5.5
74 4.75 5.0 5.25
V
54 – 55 25 125 °C
74 0 25 70
54 –1.0 mA
74 –2.6
54 12 mA
74 24
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min Typ Max Unit
Test Conditions
VIH Input HIGH Voltage
2.0
V
Guaranteed Input HIGH Voltage for
All Inputs
54
VIL Input LOW Voltage
74
0.7 Guaranteed Input LOW Voltage for
0.8 V All Inputs
VIK
VOH
Input Clamp Diode Voltage
Output HIGH Voltage
54
74
– 0.65 – 1.5
2.4 3.4
2.4 3.1
V VCC = MIN, IIN = – 18 mA
V VCC = MIN, IOH = MAX, VIN = VIH
V or VIL per Truth Table
VOL
Output LOW Voltage
54, 74
74
0.25 0.4
0.35 0.5
V IOL = 12 mA
V IOL = 24 mA
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
IOZH
Output Off Current HIGH
20 µA VCC = MAX, VO = 2.7 V
IOZL
Output Off Current LOW
–20 µA VCC = MAX, VO = 0.4 V
Input HIGH Current
D, R, W
EW
IIH ER
D, R, W
EW
ER
20
40
µA VCC = MAX, VIN = 2.7 V
60
0.1
0.2 mA VCC = MAX, VIN = 7.0 V
0.3
Input LOW Current
IIL
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
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
mA VCC = MAX
FAST AND LS TTL DATA
5-599







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