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Texas Instruments SN74AC564PWR
- Part No.:
- SN74AC564PWR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AC564PWR.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,435
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Product details
Overview
SN74AC564PWR 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 from 2V to 6V VCC, supports 9ns max propagation delay at 5V, and features flow-through pinout for optimized PCB layout. Used in I/O port buffering and bidirectional bus driving.
For engineers reviewing the SN74AC564PWR datasheet, SN74AC564PWR pinout, SN74AC564PWR application, or SN74AC564PWR equivalent, key selection criteria include its 20-pin TSSOP package, rising-edge clock triggering, inverting output logic, 3-state enable control, and compatibility with 3.3V/5V mixed-signal systems.
Technical Context
The SN74AC564PWR implements eight independent D-type flip-flops sharing a common rising-edge-triggered clock (CLK) and active-low output-enable (OE) signal. Each Q output is the logical inverse of its corresponding D input on CLK's positive transition.
Its 3-state outputs support high-impedance bus isolation without external pull-ups; OE does not affect internal state retention, enabling data latching while outputs remain tri-stated. Input voltage tolerance up to 6V allows interfacing with higher-voltage logic domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 6V - supports dual-supply systems and 3.3V/5V interoperability without level shifters |
| Max tpd | 9ns at 5V - enables reliable operation in high-speed digital control and data capture up to 85MHz |
| Output Drive | ±24mA at 5.5V - directly drives capacitive bus loads without external buffers |
| Input Voltage Range | −0.5V to VCC + 0.5V - tolerant of overvoltage transients and mixed-voltage signaling |
| Operating Temp | −40°C to +85°C - qualified for industrial ambient environments |
| Logic Family | Advanced CMOS (AC) - low power consumption with TTL-compatible noise margins |
| Propagation Delay Skew | ≤1.5ns (tPLH/tPHL) - ensures tight timing alignment across all eight channels |
Pinout & Package
TSSOP-20 (PW) package: 6.50mm × 6.4mm body size, 1.2mm max height, lead pitch 0.65mm, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-low output enable | Tri-states all eight Q outputs simultaneously; must be pulled high for normal operation |
| 2–9 (D1–D8) | Data inputs | Asynchronous inputs latched on rising CLK edge; inverted at Q outputs |
| 10 (GND) | Ground reference | Common return path for logic and output current; requires local 0.1µF bypass capacitor |
| 11 (CLK) | Clock input | Rising-edge sensitive; minimum pulse width 4ns at 5V for reliable triggering |
| 12–19 (Q8–Q1) | Inverting 3-state outputs | Qn = NOT(Dn) when OE = LOW; high-Z when OE = HIGH - enables shared bus arbitration |
| 20 (VCC) | Positive supply | Single rail powers all logic and output stages; accepts 2V–6V with full parameter compliance |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input pins (D1–D8) on left side, output pins (Q1–Q8) on right side - minimizes trace crossovers and reduces PCB layer count |
| Full parallel access | All eight D inputs accept data simultaneously - eliminates serial loading overhead in register file implementations |
| 3-state inverting outputs | Direct bus driving capability without external inverters or pull-up resistors - simplifies bidirectional data path design |
| Voltage-tolerant inputs | Accepts up to 6V regardless of VCC - enables safe interfacing with legacy 5V logic while operating at 3.3V |
| Low ICC quiescent current | 4µA typical at 5.5V - reduces static power in always-on control registers and I/O expanders |
Applications
| Industrial PLC I/O Modules | Test Equipment Digital Pattern Generators |
|---|---|
Use Scenario: Isolating microcontroller GPIO from noisy field-side sensor/actuator buses in programmable logic controllers. IC Role / Device Role / Timing Role: SN74AC564PWR acts as a buffered, edge-triggered input latch and output driver - capturing real-time status and driving relay control signals synchronously. Use Value: Its 3-state outputs prevent bus contention during configuration changes; flow-through pinout simplifies routing in dense I/O carrier boards. | Use Scenario: Generating synchronized multi-bit stimulus patterns for IC functional testing using FPGA-controlled vector sequences. IC Role / Device Role / Timing Role: SN74AC564PWR serves as a high-speed parallel output register - holding pattern bits until clocked to test pins with precise timing alignment. Use Value: 9ns max tpd and ≤1.5ns channel skew ensure sub-10ns timing resolution across all 8 bits - critical for high-speed digital validation. |
| Embedded System Address Latches | Legacy Bus Interface Adapters |
Use Scenario: Latching address bits from multiplexed AD bus in 8-bit microcontroller systems (e.g., 8051 derivatives) to separate address/data paths. IC Role / Device Role / Timing Role: SN74AC564PWR functions as an octal transparent latch replacement - capturing address on rising CLK edge with inverting output polarity. Use Value: Inverting outputs match standard address decode logic conventions; 2V–6V VCC range accommodates both 3.3V MCU cores and 5V peripheral interfaces. | Use Scenario: Bridging modern low-voltage FPGAs to legacy 5V parallel peripherals (e.g., printers, displays, memory-mapped devices). IC Role / Device Role / Timing Role: SN74AC564PWR provides level-shifted, buffered, and direction-controlled data transfer - acting as a bidirectional bus transceiver element. Use Value: Input tolerance to 6V allows direct connection to 5V buses; OE-controlled 3-state operation enables clean half-duplex handshaking without external direction logic. |
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 |
|---|---|---|---|
| SN74ACT564PWR | ACT family: higher drive (±24mA @ 3.3V), faster tpd (7ns), but higher ICC (20µA) | Better suited for 3.3V-only systems requiring tighter timing margins and stronger bus drive | Choose SN74ACT564PWR if operating exclusively at 3.3V with <8ns timing budget; SN74AC564PWR preferred for 2V–6V flexibility and lower static power |
| 74LVC574APW,118 | NXP LVC: non-inverting outputs, 1.65V–3.6V VCC, smaller 20-TSSOP (4.4mm width), lower drive (±24mA @ 3.3V) | Designed for 3.3V/2.5V mobile and portable systems; lacks 5V tolerance and inverting logic | Select 74LVC574APW,118 only for space-constrained 3.3V designs where output inversion is unnecessary and 5V interface is absent |
Compared with SN74ACT564PWR and 74LVC574APW,118, the SN74AC564PWR uniquely balances wide VCC range (2V–6V), inverting 3-state outputs, and industrial temperature rating - making it the optimal choice for mixed-voltage industrial control and legacy interface adaptation where logic polarity and voltage robustness are critical.
Availability
SN74AC564PWR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, embedded system address latching, and legacy bus interface adapters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AC564PWR 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 specializing in analog, embedded processing, and logic solutions with over 50 years of innovation in industrial, automotive, and communications markets.
The SN74AC564PWR belongs to TI's Advanced CMOS (AC) logic family, engineered for high-speed, low-power, voltage-flexible digital interfacing in industrial control, test equipment, and system-level bus management applications.
FAQ
What is the maximum clock frequency supported by the SN74AC564PWR?
The SN74AC564PWR supports up to 95MHz maximum clock frequency at VCC = 5V ± 0.5V and −40°C to +85°C, with guaranteed minimum pulse width of 4ns for CLK high/low time. At 3.3V, max frequency is 75MHz. These values are measured under specified load conditions (CL = 50pF) and reflect worst-case timing across all eight channels in the SN74AC564PWR device.
Does the SN74AC564PWR require external pull-up resistors on the OE pin?
Yes - for reliable high-impedance state during power-up/power-down, OE must be tied to VCC via an external pull-up resistor. TI specifies minimum resistance based on driver sink capability; a 10kΩ resistor is commonly used. Without this, outputs may float or partially enable during supply ramp, risking bus contention. This requirement applies specifically to the SN74AC564PWR in all TSSOP-based deployments.
Can the SN74AC564PWR operate with a 3.3V supply while interfacing with 5V logic inputs?
Yes - the SN74AC564PWR accepts input voltages up to 6V regardless of VCC, so it safely interfaces with 5V logic signals when powered at 3.3V. This allows direct connection to legacy 5V peripherals without level shifters. The SN74AC564PWR maintains full AC and DC specifications at 3.3V, including 9ns max tpd and ±12mA output drive.
What is the thermal resistance (RθJA) of the SN74AC564PWR in its TSSOP package?
The SN74AC564PWR in PW (TSSOP-20) package has a junction-to-ambient thermal resistance (RθJA) of 126.2°C/W, per TI's latest revision (February 2024). This value assumes standard JEDEC 2-layer board conditions (2 oz copper, 100mm² pad). For thermally constrained designs, derating or localized copper pours are recommended to maintain junction temperature below 125°C under continuous 24mA output loading.
Is the SN74AC564PWR pin-compatible with other members of the '564 family such as SN74AC564DBR?
Yes - the SN74AC564PWR shares identical pin configuration, function mapping, and electrical behavior with all SN74AC564 variants (DB, DW, N, PW), including SN74AC564DBR. All packages use the same 20-pin layout with OE, D1–D8, GND, CLK, Q8–Q1, and VCC in identical positions. Mechanical dimensions differ, but PCB footprint and signal routing are fully interchangeable across SSOP, SOIC, PDIP, and TSSOP versions of the SN74AC564PWR.
SN74AC564PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
SN74AC564PWR FAQ
1.How can I place an order for SN74AC564PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AC564PWR 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 SN74AC564PWR reliable?
The price and inventory of SN74AC564PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AC564PWR is usually 5 days.
3.What payment methods are accepted for SN74AC564PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AC564PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AC564PWR?
SN74AC564PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AC564PWR 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 SN74AC564PWR?
For technical support, including SN74AC564PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AC564PWR requirements.
6.How does Aetrix verify that SN74AC564PWR is sourced from the original manufacturer or authorized distributors?
All SN74AC564PWR 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 SN74AC564PWR meets industry standards.
7.What is the process for return or replacement of SN74AC564PWR?
All SN74AC564PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AC564PWR, 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 SN74AC564PWR part is unused and in its original packaging.
Return procedure for SN74AC564PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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