CD74HCT640E Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74HCT640E is a high-speed CMOS octal inverting bus transceiver with 3-state outputs and bidirectional direction control. Operates at 2V–6V supply with 50pF load capacitance, 6mA output current, and 20-pin DIP package. From $2.02, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD74HCT640E Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.0200(MOQ 1)
- 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 CD74HCT640E?
- Octal inverting bus transceiver with 3-state outputs enables bidirectional data flow on shared buses
- HCT family CMOS logic ensures TTL-compatible input thresholds for seamless mixed-logic system integration
- Supports 50pF load capacitance with 6mA (IOL) drive strength for reliable high-speed signal transmission
- Common direction control pin simplifies bus arbitration in microprocessor and data communication systems
- 20-pin DIP (R-PDIP-T20) package offers through-hole mounting convenience for prototyping and industrial applications
What is CD74HCT640E used for?
The CD74HCT640E is widely used in microprocessor data bus buffering and bidirectional data routing between system modules. Its TTL-compatible CMOS inputs make it ideal for interfacing legacy TTL logic with modern CMOS devices in industrial control and embedded systems. It also serves in memory bus expansion, FPGA I/O buffering, and communication interface designs requiring reliable 3-state bus management.
What are the specifications of CD74HCT640E?
| YTEOL | 15 |
| Additional Feature | WITH DIRECTION CONTROL |
| Control Type | COMMON CONTROL |
| Count Direction | BIDIRECTIONAL |
| Family | HCT |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS TRANSCEIVER |
| Max I(ol) | 0.006A |
| Number of Bits | 8 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.08mA |
| Prop. Delay@Nom-Sup | 28ns |
| Propagation Delay (tpd) | 33ns |
| Qualification Status | Not Qualified |
| Schmitt Trigger | NO |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| 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) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Where can I find the CD74HCT640E datasheet?
CD74HCT640E Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HCT640E?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the supply voltage range and logic family of the CD74HCT640E?
The CD74HCT640E belongs to the HCT (High-speed CMOS TTL-compatible) family and operates from a 2V to 6V supply voltage. Its TTL-compatible input thresholds allow direct interfacing with standard TTL logic devices, making it a versatile choice for mixed-logic system designs.
How does the direction control work on the CD74HCT640E?
The CD74HCT640E features a common direction control (DIR) pin that determines the data flow direction across all 8 channels simultaneously. When DIR is HIGH, data flows from B to A; when LOW, data flows from A to B. The 3-state outputs can be disabled using the output enable (OE) pin, allowing bus sharing with other devices.
What are typical applications for the CD74HCT640E?
The CD74HCT640E is commonly used in microprocessor and microcontroller data bus buffering, memory address/data bus expansion, and bidirectional communication between system boards. It is also applied in FPGA I/O interfacing, industrial control panels, and any design requiring octal-wide 3-state bus transceiver functionality.
What package does the CD74HCT640E use, and are there SMD alternatives?
The CD74HCT640E comes in a 20-pin dual-in-line package (PDIP), ideal for through-hole prototyping and industrial boards. For surface-mount applications, Texas Instruments offers equivalent devices in SOIC (CD74HCT640M) and TSSOP packages, which provide the same electrical performance in a smaller PCB footprint.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $4.2400 | $4.24 |
| 10+ | $3.0100 | $30.10 |
| 20+ | $2.8400 | $56.80 |
| 107+ | $2.8000 | $299.60 |
| 260+ | $2.7100 | $704.60 |
| 500+ | $2.0200 | $1010.00 |
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