CD74HC670EE4 Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HC670EE4 is a 4×4 register file from Texas Instruments in the HC CMOS logic family, offering 4 independently addressable 4-bit registers with simultaneous read and write capability. It operates from 2 V to 6 V, features 50 pF load tolerance, and is packaged in a 16-pin PDIP for digital storage and data routing applications.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD74HC670EE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CD74HC670EE4?
- 4×4 register file with 4-bit words and 4 independently addressable locations
- Simultaneous non-destructive read and write operations via separate address ports
- HC/UH CMOS family operating from 2 V to 6 V supply
- 50 pF load capacitance drive capability for standard TTL bus lines
- 16-pin PDIP package for prototyping and through-hole assembly
- Three-state outputs for direct bus connection and wired-OR configurations
What is CD74HC670EE4 used for?
CD74HC670EE4 is used in digital logic systems requiring small on-chip data storage, such as microprocessor interface buffers, data routing crossbars, and address scratchpad registers in retro-computing and educational prototyping projects. It also serves in programmable logic evaluation boards and FPGA trainer kits where simple parallel-in parallel-out register files are needed without a full memory array.
What are the specifications of CD74HC670EE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Count Direction | RIGHT |
| Family | HC/UH |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | PARALLEL IN PARALLEL OUT |
| Number of Bits | 4 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 50mA |
| Propagation Delay (tpd) | 315ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the CD74HC670EE4 datasheet?
CD74HC670EE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC670EE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Can CD74HC670EE4 perform simultaneous read and write to different registers without data corruption?
Yes. CD74HC670EE4 has separate read-address and write-address inputs, so it supports simultaneous read from one of the 4 registers and write to a different register in the same clock cycle. This non-destructive simultaneous access eliminates bus arbitration delays in small FIFO or scratchpad designs using only a single 16-pin IC.
What supply voltage range does CD74HC670EE4 support, and does it interface directly with both 3.3 V and 5 V logic systems?
The device operates from 2 V to 6 V, covering both 3.3 V and 5 V logic supply rails. At 3.3 V the output high level exceeds 3.0 V, meeting the input threshold of most 3.3 V logic families, while at 5 V it is fully TTL-compatible with standard 74HCT logic gates, allowing mixed-voltage board designs.
How does CD74HC670EE4 in PDIP-16 compare to an equivalent SOIC-16 variant for a prototype lab board?
The PDIP-16 body measures approximately 20 mm × 7.6 mm and inserts directly into solderless breadboards with a standard 2.54 mm pitch. An SOIC-16 variant requires SMT assembly or a breakout adapter for breadboard use, making CD74HC670EE4 in PDIP-16 the preferred choice when rapid prototyping with through-hole components and no reflow oven.
What is the lifecycle risk when designing with CD74HC670EE4 given its YTEOL status, and what replacement options exist?
CD74HC670EE4 carries a YTEOL (years to end-of-life) value near 0, indicating it is approaching or at end-of-life status. Designers should evaluate alternative 4-bit register files in SOIC or TSSOP packages from the 74HC670 family across other suppliers, or migrate to a small CPLD or FPGA with equivalent 4×4 register logic synthesized in programmable fabric.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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