CD74HC564E Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
The CD74HC564E is a high-speed CMOS octal inverting D-type flip-flop with 3-state outputs, positive-edge triggering, and active-low output enable, operating from 2 V to 6 V supply with 50 pF load capacitance in a 20-pin PDIP package. It serves as a registered bus driver for 8-bit data buses where inverted latching is required. Available from stock worldwide with RoHS-compliant e4 finish.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD74HC564E Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4474(MOQ 260)
- 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 CD74HC564E?
- Octal positive-edge-triggered inverting flip-flop with 3-state outputs enabling bus sharing among multiple data sources on an 8-bit parallel bus
- HC family CMOS operation from 2 V to 6 V supply providing TTL-input compatibility and high noise immunity for 5 V digital systems
- Active-low output enable for easy bus isolation and multiplexing in registered bus driver and data pipeline applications
- 20-pin PDIP package makes CD74HC564E compatible with DIP sockets and breadboards for rapid prototyping of bus interface circuits
What is CD74HC564E used for?
The CD74HC564E is used as a registered bus driver and data pipeline register in 8-bit microprocessor systems where output inversion is needed between the data register and the downstream bus. Its 3-state outputs allow multiple CD74HC564E devices to share a common 8-bit bus with only one driving at a time, controlled by the active-low output enable. Typical applications include address/data bus expansion, I/O port latching, and backplane bus management in embedded and industrial control systems.
What are the specifications of CD74HC564E?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | BROADSIDE VERSION OF 534 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | HC/UH |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max Frequency@Nom-Sup | 20000000Hz |
| Max I(ol) | 0.0078A |
| 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 | 41ns |
| Propagation Delay (tpd) | 250ns |
| 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 (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Trigger Type | POSITIVE EDGE |
| 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 CD74HC564E datasheet?
CD74HC564E Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74HC564E?
Compatible alternatives and drop-in replacements for CD74HC564E:
Frequently Asked Questions
How does the inverting output of CD74HC564E differ from non-inverting octal flip-flops like 74HC574, and when is inversion useful?
CD74HC564E outputs the logical complement of each D input at the rising clock edge, whereas 74HC574 presents the same polarity as the input. Inversion is useful when the downstream bus or load logic expects active-low data, allowing CD74HC564E to eliminate an external inverter stage and reduce the propagation delay and component count in bus interface designs.
What supply voltage and load capacitance does CD74HC564E support for 5 V bus driver applications?
CD74HC564E operates from 2 V to 6 V and is characterized with 50 pF load capacitance on all 8 outputs. At 5 V supply with 50 pF loading, propagation delay is typically around 10 ns, making it suitable for 8-bit parallel buses running at clock rates up to tens of MHz in standard CMOS logic systems.
How do the 3-state outputs of CD74HC564E enable bus sharing in multi-master systems?
CD74HC564E's 3-state outputs, controlled by an active-low output enable pin, present a high-impedance state when disabled, effectively disconnecting all 8 outputs from the bus simultaneously. This allows multiple registered bus drivers to be connected to the same 8-wire bus, with only one device enabled at a time by asserting its output enable low, preventing bus contention.
For a legacy 8-bit microprocessor system retrofit, how does CD74HC564E compare to a 74LS564 in power consumption?
CD74HC564E, being a CMOS HC-family device, consumes far less quiescent power than the bipolar TTL 74LS564, typically under 1 µA static versus several milliamperes for LS logic. This makes CD74HC564E the preferred replacement in retrofitted industrial systems running from 5 V rails where thermal management or battery operation is now a concern.
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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 |
|---|---|---|
| 260+ | $0.5790 | $150.54 |
| 1000+ | $0.5410 | $541.00 |
| 4000+ | $0.5090 | $2036.00 |
| 100000+ | $0.4474 | $44740.00 |
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