SN74LS670N

Maximum Clock Frequency :
Number of Circuits : Octal
Supply Voltage - Max : 5.25 V
Packaging : Tube
Package / Case : PDIP-16
Low Level Output Current : 8 mA
Maximum Operating Temperature : + 70 C
Logic Type : Bipolar
Logic Family : LS
Propagation Delay Time : 45 ns
High Level Output Current : - 2.6 mA


Description

The SN74LS670N is designed as 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.

SN74LS670N has five features. (1)Simultaneous read/ write operation. (2)Expandable to 512 words by n-bits. (3)Typical access time to 20ns. (4)3-state outputs for expansion. (5)Typical power dissipation of 125mW. Those are all the main features.

Some guaranteed operating ranges of SN74LS670N have been concluded into several points as follow. (1)Its supply voltage range would be min 4.75V and typ 5.0V and max 5.25V. (2)Its operating ambient temperature range would be min 0°C and typ 25°C and max 70°C. (3)Its output current high level would be max -2.6mA. (4)Its output current low level would be max 24mA.

Also some DC characteristics of SN74LS670N are concluded as follow. (1)Its input high voltage would be min 2.0V with conditions of guaranteed input high voltage for all inputs. (2)Its input low voltage would be max 0.8V with conditions of guaranteed input low voltage for all inputs. (3)Its input clamp diode voltage would be typ -0.65V and max -1.5V with condition of Vcc=min, Iin=-18mA. (4)Its output high voltage would be min 2.4V and typ 3.1V. (5)Its output low voltage would be typ 0.25V and max 0.4V with condition of Iol=12mA and would be typ 0.35V and max 0.5V with condition of Iol=24mA. (6)Its input high current would be max 20uA with condition of Vcc=max and Vin=2.7V and it would be max 0.1mA with condition of Vcc=max and Vin=7.0V. (7)Its input low current would be max -0.4mA. (8)Its short circuit current would be min -30mA and max -130mA with condition of Vcc=max. (9)Its power supply current would be max 50mA with condition of Vcc=max.

And some AC characteristics of SN74LS670N are concluded into several points as follow. (1)Its propagation delay Ra or Rb to output would be typ 23ns and max 40ns. (2)Its propagation delay Ew to output would be typ 26ns and max 45ns. (3)Its propagation delay data to output would be typ 25ns and max 45ns. And so on. If you have any question or suggestion or want to know more information please contact us for details. Thank you!

Parameters:

Technical/Catalog Information	SN74LS670N
Vendor	Texas Instruments
Category	Integrated Circuits (ICs)
Logic Type	Register, Bidirectional
Function	Universal
Number of Elements	1 - Single
Number of Bits per Element	4
Output Type	Standard
Voltage - Supply	4.75 V ~ 5.25 V
Mounting Type	Through Hole
Package / Case	16-DIP (300 mil)
Packaging	Tube
Operating Temperature	0°C ~ 70°C
Drawing Number	296; 4040049; N; 14, 16, 18, 20
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	SN74LS670N SN74LS670N