Texas Instruments 7704201FA
- Part Number:
- 7704201FA
- Manufacturer:
- Texas Instruments
- Ventron No:
- 6389551-7704201FA
- Description:
- 4-By-4 Register Files With 3-State Outputs
- Datasheet:
- sn54ls670
- Supply voltage (min) (V)4.75
- Supply voltage (max) (V)5.25
- Input typeBipolar
- Output type3-State
- Clock frequency (max) (MHz)35
- FeaturesUnidirectional
- Operating temperature range (°C)-55 to 125
- RatingMilitary
The SN54LS670 and SN74LS670 MSI 16-bit TTL register files incorporate the equivalent of 98 gates. The register file is organized as 4 words of 4 bits each and separate on-chip decoding is provided for addressing the four word locations to either write-in or retrieve data. This permits simultaneous writing into one location and reading from another word location.
Four data inputs are available which are used to supply the 4-bit word to be stored. Location of the word is determined by the write-address inputs A and B in conjunction with a write-enable signal. Data applied at the inputs should be in its true form. That is, if a high-level signal is desired from the output, a high-level is applied at the data input for that particular bit location. The latch inputs are arranged so that new data will be accepted only if both internal address gate inputs are high. When this condition exists, data at the D input is transferred to the latch output. When the write-enable input, G\W, is high, the data inputs are inhibited and their levels can cause no change in the information stored in the internal latches. When the read-enable input, G\R, is high, the data outputs are inhibited and go into the high-impedance state.
The individual address lines permit direct acquisition of data stored in any four of the latches. Four individual decoding gates are used to complete the address for reading a word. When the read address is made in conjunction with the read-enable signal, the word appears at the four outputs.
This arrangement — data-entry addressing separate from data-read addressing and individual sense line — eliminates recovery times, permits simultaneous reading and writing, and is limited in speed only by the write time (27 nanoseconds typical) and the read time (24 nanoseconds typical). The register file has a nondestructive readout in that data is not lost when addressed.
All inputs except read enable and write enable are buffered to lower the drive requirements to one Series 54LS/74LS standard load, and input-clamping diodes minimize switching transients to simplify system design. High-speed, double-ended AND-OR-INVERT gates are employed for the read-address function and have high-sink-current, three-state outputs. Up to 128 of these outputs may be bus connected for increasing the capacity up to 512 words. Any number of these registers may be paralleled to provide n-bit word length.
The SN54LS670 is characterized for operation over the full military temperature range of -55°C to 125°C; the SN74LS670 is characterized for operation from 0°C to 70°C.
Register File Single 4-CH Bipolar 16-Pin CFPAK Tube
4 X 4 STANDARD SRAM 45 ns CDFP16
4-BY-4 REGISTER FILES WITH 3-STA
SN54LS670 4-BY-4 REGISTER FILES
Latest News
-
19 February 2024
SG3525AN Controller: Specifications, Application Circuit and Other Details
Ⅰ. Overview of SG3525ANⅡ. Specifications of SG3525ANⅢ. Application circuit of SG3525ANⅣ. How to evaluate the efficiency of SG3525AN controller?Ⅴ. Recommended operating conditions for SG3525ANⅥ. What are the advantages... -
19 February 2024
SS14 Schottky Power Diode Function, Applications, Working Principle and Features
Ⅰ. What is a Schottky diode?Ⅱ. SS14 overviewⅢ. Common brands of SS14 diodeⅣ. Typical performance characteristics of SS14 diodeⅤ. The function of SS14 diodeⅥ. What are the applications... -
20 February 2024
LM358DR2G Operational Amplifier Symbol, Features, Applications and More
Ⅰ. Introduction to LM358DR2GⅡ. Technical parameters of LM358DR2GⅢ. Features of LM358DR2GⅣ. Symbol, footprint and pin configuration of LM358DR2GⅤ. Where is LM358DR2G used?Ⅵ. Circuit description of LM358DR2GⅦ. The difference... -
20 February 2024
MB6S Rectifier Bridge Specifications, Working Principle and Features
Ⅰ. Overview of MB6SⅡ. Specifications of MB6SⅢ. Working principle of MB6SⅣ. Circuit schematic diagram of MB6SⅤ. What are the features of MB6S?Ⅵ. Absolute maximum ratings of MB6SⅦ. How...
Help you to save your cost and time.
Reliable package for your goods.
Fast Reliable Delivery to save time.
Quality premium after-sale service.