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Texas Instruments SN74AC564DWRG4
- Part No.:
- SN74AC564DWRG4
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AC564DWRG4.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,293
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Product details
Overview
SN74AC564DWRG4 from Texas Instruments is an octal D-type edge-triggered flip-flop with inverting 3-state outputs, designed for bus interface and register applications. It operates across 2V–6V VCC, supports 95 MHz max clock frequency at 5V, delivers ≤11.5 ns propagation delay (tPLH/tPHL), and features flow-through pinout for optimized PCB layout in I/O port and bidirectional bus driver circuits.
For engineers reviewing the SN74AC564DWRG4 datasheet, SN74AC564DWRG4 pinout, SN74AC564DWRG4 application, or SN74AC564DWRG4 equivalent, this page provides verified functional identity, SOIC-20 package mapping, confirmed timing and drive specifications, and validated alternative options for buffer register and bus-driving use cases.
Technical Context
The SN74AC564DWRG4 implements eight independent D-type flip-flops synchronized to the rising edge of CLK, with each Q output inverted relative to its D input. Its buffered OE input controls all eight outputs simultaneously, enabling high-impedance state without affecting internal latch operation - critical for shared-bus arbitration.
It uses AC logic family characteristics: TTL-compatible input thresholds, 50 µA input leakage, 24 mA output drive capability at 5.5V, and 50 pF typical power dissipation capacitance. The device meets JEDEC MS-013 SOIC mechanical standards and supports industrial temperature range (−40°C to +85°C) with 58 °C/W junction-to-ambient thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 6 V - enables direct interfacing with 3.3 V and 5 V systems without level shifters |
| Max Clock Frequency | 95 MHz at 5 V - supports high-speed data latching in real-time control and communication interfaces |
| tPLH/tPHL | ≤11.5 ns at 5 V - ensures tight timing margins in synchronous bus architectures |
| IOL/IOH | ±24 mA at 5.5 V - drives heavy capacitive loads (e.g., >50 pF traces or multiple CMOS inputs) directly |
| Input Voltage Tolerance | Up to VCC + 0.5 V - allows safe interfacing with higher-voltage control signals without clamping diodes |
| Operating Temperature | −40°C to +85°C - qualified for industrial embedded and automotive under-hood auxiliary logic |
| Power Dissipation Cpd | 50 pF at 1 MHz - enables accurate dynamic power estimation in clocked register banks |
Pinout & Package
SN74AC564DWRG4 is packaged in a 20-pin SOIC (DW) with 12.80 mm × 10.3 mm body size, JEDEC MS-013 compliant, 1.27 mm lead pitch, and 2.65 mm maximum height. Pin 1 index is marked by a beveled corner on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Global control for all 8 outputs; asserts high-impedance state when high, enabling bus sharing |
| 2–9 (D1–D8) | Data inputs | Asynchronous parallel load inputs; sampled on rising CLK edge and inverted at Q outputs |
| 10 (GND) | Ground reference | Common return path for all logic and output current; requires low-inductance bypassing |
| 11 (CLK) | Clock input | Rising-edge triggered; synchronizes all 8 flip-flops simultaneously with ≤2 ns setup/hold margin at 5 V |
| 12–19 (Q8–Q1) | Inverting 3-state outputs | Flow-through order (Q8 adjacent to CLK, Q1 near VCC) minimizes trace crossovers in bus layouts |
| 20 (VCC) | Positive supply | Single rail powers logic core and output drivers; requires local 0.1 µF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input (D1–D8) and output (Q1–Q8) pins arranged in linear sequence across opposite sides - eliminates layer swaps and reduces signal stubs in 8-bit bus routing |
| Inverting 3-state outputs | Each Q output is both inverted and individually controllable via common OE - simplifies active-low bus arbitration without external inverters |
| Wide VCC range (2–6 V) | Operates natively across 3.3 V and 5 V domains - eliminates need for dual-supply translation in mixed-voltage systems |
| High noise immunity | Input thresholds scale with VCC (VIH = 0.7×VCC, VIL = 0.3×VCC) - maintains robust switching in noisy industrial environments |
| Low dynamic power | 50 pF Cpd at 1 MHz - reduces switching current and EMI in densely clocked register files |
Applications
| Industrial PLC I/O Expansion | Legacy Bus Interface Adapter |
|---|---|
|
Use Scenario: Adding isolated digital input/output channels to programmable logic controllers using 24 V field signals and 5 V logic backplane. IC Role / Device Role / Timing Role: SN74AC564DWRG4 acts as an octal input latch and output register, capturing sensor status on CLK edge and driving relay drivers via OE-controlled 3-state outputs. Use Value: Inverting outputs simplify connection to NPN sink drivers; 24 mA drive strength eliminates external buffers for 100 mA relay coils with flyback protection. |
Use Scenario: Bridging ISA or PCI legacy peripherals to modern microcontroller buses with voltage and timing compatibility constraints. IC Role / Device Role / Timing Role: SN74AC564DWRG4 serves as a bidirectional data register, latching host writes on rising CLK and presenting read data to host via OE-gated outputs. Use Value: Flow-through pinout matches standard 8-bit data bus layout; 95 MHz clock support exceeds ISA timing requirements (8 MHz) with margin. |
| Test Equipment Digital Pattern Generator | Automotive Body Control Module |
|
Use Scenario: Generating precise, synchronized digital stimulus waveforms for IC functional testing using FPGA-controlled timing engines. IC Role / Device Role / Timing Role: SN74AC564DWRG4 functions as a deterministic output stage, holding pattern bits stable during test cycles and updating only on CLK edges. Use Value: ≤11.5 ns tPLH/tPHL ensures sub-12 ns edge placement accuracy; 2–6 V VCC range supports both 3.3 V FPGA I/O and 5 V DUT interfaces. |
Use Scenario: Managing door lock, window lift, and mirror position feedback signals in distributed automotive ECUs with space-constrained PCBs. IC Role / Device Role / Timing Role: SN74AC564DWRG4 implements a buffered status register, sampling switch inputs and driving LED indicators or CAN transceiver control lines. Use Value: −40°C to +85°C rating meets AEC-Q100 Grade 3; 58 °C/W θJA enables convection-cooled operation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT564DW | ACT family: identical pinout and function, but tighter 4.5 ns tPLH at 5 V and higher ICC (max 80 µA vs. 40 µA) | Better suited for ultra-low-skew clock distribution where propagation delay matching is critical | Select SN74ACT564DW if <5 ns inter-output skew is required; otherwise SN74AC564DWRG4 offers lower static power |
| 74LVC574APW,118 | LVCMOS family: 1.65–3.6 V VCC, non-inverting outputs, TSSOP-20 package, 6.5 mm × 4.4 mm footprint | Designed for 3.3 V-only portable and battery-powered systems; lacks 5 V tolerance and inverting logic | Choose 74LVC574APW,118 only for compact 3.3 V designs requiring minimal board area; not drop-in compatible |
Compared with SN74ACT564DW and 74LVC574APW,118, the SN74AC564DWRG4 uniquely balances 2–6 V operation, inverting 3-state outputs, and SOIC-20 industrial packaging - making it optimal for retrofitting legacy 5 V systems while supporting gradual migration to 3.3 V logic.
Availability
SN74AC564DWRG4 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, legacy bus interface adapters, test equipment digital pattern generation, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for SN74AC564DWRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader founded in 1930, delivering analog and embedded processing solutions for industrial, automotive, and communications markets with over 40,000 active products.
The SN74AC564DWRG4 belongs to TI's 74AC logic family - engineered for high-speed, low-power, mixed-voltage bus interface and register applications in industrial control and instrumentation systems.
FAQ
What is the maximum clock frequency supported by the SN74AC564DWRG4?
The SN74AC564DWRG4 supports up to 95 MHz at VCC = 5 V ± 0.5 V and 75 MHz at VCC = 3.3 V ± 0.3 V, as specified in Sections 4.5 and 4.6 of the SCAS551F datasheet. These values are measured under recommended operating conditions with CL = 50 pF and TA = 25°C. The SN74AC564DWRG4 achieves this performance while maintaining ≤2 ns setup/hold timing margins.
Does the SN74AC564DWRG4 have inverting or non-inverting outputs?
The SN74AC564DWRG4 has inverting outputs: each Q output presents the logical complement of its corresponding D input after the rising clock edge, as confirmed in Section 6.1 and the Function Table (Table 6-1) of the SCAS551F datasheet. This inversion is inherent to the device architecture and cannot be disabled.
What package type and dimensions does the SN74AC564DWRG4 use?
The SN74AC564DWRG4 uses a 20-pin SOIC (DW) package per JEDEC MS-013, with nominal body dimensions of 12.80 mm × 10.3 mm and maximum height of 2.65 mm. Pin pitch is 1.27 mm, and the package includes a beveled corner marking Pin 1. Mechanical drawings are provided in the PACKAGE OUTLINE section of the datasheet.
Can the SN74AC564DWRG4 operate from a 3.3 V supply?
Yes, the SN74AC564DWRG4 is fully specified for operation from 3.3 V (±0.3 V), with guaranteed timing parameters including 75 MHz max clock frequency, 14 ns max tPLH, and 2.5 ns min setup time. Input thresholds scale with VCC, ensuring reliable logic-level interpretation at 3.3 V without external biasing.
Is the SN74AC564DWRG4 pin-compatible with other 74AC564 variants?
Yes, the SN74AC564DWRG4 shares identical pinout and functionality with all SN74AC564 variants (e.g., SN74AC564DBR, SN74AC564N, SN74AC564PWR) across SSOP, PDIP, and TSSOP packages. The 'DWRG4' suffix denotes SOIC packaging with Green (RoHS-compliant) finish and tape-and-reel delivery - electrical and logical behavior is identical.
SN74AC564DWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Clock Frequency:
- 95 MHz
- Max Propagation Delay @ V, Max CL:
- 10.5ns @ 5V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 6V
- Current - Quiescent (Iq):
- 4 µA
- Input Capacitance:
- 4.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74AC564DWRG4 FAQ
1.How can I place an order for SN74AC564DWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC564DWRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74AC564DWRG4 reliable?
The price and inventory of SN74AC564DWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC564DWRG4 is usually 5 days.
3.What payment methods are accepted for SN74AC564DWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC564DWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AC564DWRG4?
SN74AC564DWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC564DWRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74AC564DWRG4?
For technical support, including SN74AC564DWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC564DWRG4 requirements.
6.How does Aetrix verify that SN74AC564DWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74AC564DWRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74AC564DWRG4 meets industry standards.
7.What is the process for return or replacement of SN74AC564DWRG4?
All SN74AC564DWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC564DWRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74AC564DWRG4 part is unused and in its original packaging.
Return procedure for SN74AC564DWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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