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NXP Semiconductors 74LVT534DB,112
- Part No.:
- 74LVT534DB,112
- Manufacturer:
- NXP Semiconductors
- Category:
- Flip Flops
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVT534DB,112.pdf
- Description:
- IC FF D-TYPE SNGL 8BIT 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:924
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Product details
Overview
74LVT534DB,112 from NXP Semiconductors (formerly Philips) is a 3.3 V octal D-type inverting flip-flop with 3-State outputs, edge-triggered clock input, common active-LOW output enable, and bus-hold inputs. It operates from –40 °C to +85 °C, supports 5 V-tolerant I/O, and delivers 3.0 ns typical propagation delay at 3.3 V with 50 pF load.
For engineers reviewing the 74LVT534DB,112 datasheet, 74LVT534DB,112 pinout, 74LVT534DB,112 application, or 74LVT534DB,112 equivalent, key selection criteria include its 3-State bus-driving capability, power-up 3-State behavior, latch-up immunity (>500 mA), ESD robustness (2000 V HBM), and compatibility with mixed-voltage 3.3 V/5 V system interconnects.
Technical Context
The 74LVT534DB,112 implements eight independent D-type latches triggered on the rising edge of CP, each feeding an inverting 3-State output buffer. Its dual-control architecture separates data capture (clock-gated) from output state (OE-gated), enabling simultaneous register update and bus isolation.
Designed for BiCMOS process, it combines TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V) with 3.3 V core operation and 5 V-tolerant I/O pins. Bus-hold circuitry on all D inputs eliminates external pull-ups, and power-up 3-State ensures outputs remain high-impedance during supply ramp-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Enables stable operation across industrial 3.3 V rail tolerances without level-shifting. |
| Propagation Delay (tPLH/tPHL) | 3.0 / 3.5 ns @ VCC = 3.3 V, CL = 50 pF - Supports >100 MHz clock rates in synchronous bus interfaces. |
| Output Drive | ±32 mA @ VCC = 3.0 V - Sufficient to drive standard 50 Ω transmission lines or heavily loaded 3-State buses. |
| Input Voltage Range | 0 V to 5.5 V - Allows direct connection to 5 V logic without external translators or clamping diodes. |
| Bus-Hold Current | ±75 µA to ±150 µA - Actively holds unused D inputs at valid logic levels, removing need for external biasing. |
| Power-Up State | 3-State outputs - Prevents bus contention during power sequencing in multi-supply systems. |
| ESD Rating | 2000 V HBM, 200 V MM - Meets industrial handling requirements without additional protection circuitry. |
Pinout & Package
74LVT534DB,112 is housed in a 20-pin plastic shrink small outline package (SSOP), body width 5.3 mm, JEDEC MO-153 compliant, with 0.65 mm lead pitch and gull-wing terminations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OE) | Active-LOW output enable | Global control for all eight 3-State outputs; HIGH disables outputs to high-impedance state. |
| 2–9, 12–19 (Q0–Q7) | Inverting 3-State outputs | Complement of registered D input; tri-statable independently of clock; no bus loading when disabled. |
| 3–4, 7–8, 13–14, 17–18 (D0–D7) | Data inputs with bus-hold | Edge-triggered inputs retaining state when floating; eliminate external pull-up resistors. |
| 11 (CP) | Positive-edge clock | Transfers Dn to Qn on LOW-to-HIGH transition; setup/hold times defined for reliable sampling. |
| 10 (GND) | Digital ground reference | Common return path for all internal logic and output drivers; decoupling required near VCC pin. |
| 20 (VCC) | 3.3 V supply input | Core logic and output driver supply; must be bypassed with 100 nF ceramic capacitor close to pin. |
Key Features
| Feature | Design Value |
|---|---|
| 3-State bus interface | Enables time-multiplexed sharing of data/address buses among multiple devices without contention. |
| TTL-compatible I/O levels | Accepts 5 V logic inputs while operating from 3.3 V supply, simplifying mixed-voltage board design. |
| Integrated bus-hold on D inputs | Maintains valid logic states on unconnected or unterminated D lines, improving noise immunity and reducing BOM count. |
| Live insertion/extraction support | Allows hot-swap replacement in backplane or modular systems without disrupting bus operation. |
| Power-up 3-State and reset | Guarantees outputs remain high-Z until VCC stabilizes, preventing spurious bus writes during power-on. |
Applications
| Memory Address Latching | PCI Bus Interface |
|---|---|
Use Scenario: Latching 32-bit address signals between a 3.3 V microprocessor and 5 V SRAM or Flash memory. IC Role / Device Role / Timing Role: Edge-triggered octal register capturing address bits on CPU clock edge; inverting outputs match memory's active-low address strobe timing. Use Value: Eliminates need for discrete level shifters and pull-up networks while ensuring clean, glitch-free address hold during memory access cycles. | Use Scenario: Isolating and buffering command/status signals on a 3.3 V PCI add-in card connected to a 5 V legacy host. IC Role / Device Role / Timing Role: 3-State D flip-flop synchronizing control signals (e.g., FRAME#, IRDY#) between domains; OE enables dynamic bus arbitration. Use Value: Provides voltage translation, timing alignment, and bus contention prevention without external logic or delay penalties. |
| Industrial PLC I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Interfacing FPGA-based controller logic to 24 V digital I/O modules via opto-isolated 5 V intermediate stage. IC Role / Device Role / Timing Role: Octal register holding output commands before driving isolated buffers; bus-hold prevents floating inputs during configuration gaps. Use Value: Ensures deterministic startup behavior and reduces susceptibility to EMI-induced glitches on long I/O traces. | Use Scenario: Capturing and buffering parallel test vectors from a pattern generator into a DUT interface board with mixed 3.3 V/5 V signal paths. IC Role / Device Role / Timing Role: Synchronized data staging element with 3-State outputs allowing shared test bus access across multiple instrument channels. Use Value: Enables precise timing correlation (≤3.5 ns skew) and eliminates bus conflicts during vector switching or calibration sequences. |
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 |
|---|---|---|---|
| SN74LVC574APW | Non-inverting outputs; 1.65–3.6 V supply range; no bus-hold; lower drive (±24 mA) | Requires external pull-ups if inputs float; unsuitable where inverted output polarity is required | Select when non-inverting logic and wider VCC range outweigh need for bus-hold and higher drive |
| 74ALVCH162374DL | 16-bit, non-inverting, 3-State; 1.65–3.6 V; includes power-down mode; no bus-hold | Higher channel count but double the pin count; lacks bus-hold and 5 V tolerance | Choose for high-density 16-bit latching where space permits and 5 V interfacing is not needed |
Compared with SN74LVC574APW and 74ALVCH162374DL, the 74LVT534DB,112 uniquely combines inverting outputs, 5 V-tolerant I/O, integrated bus-hold, and 32 mA drive-making it optimal for legacy bus bridging and noise-prone industrial control interfaces where polarity matching and floating-input resilience are critical.
Availability
74LVT534DB,112 is available at Aetrix Electronics and suitable for industrial automation controllers, PCI-compliant peripheral cards, memory subsystems, and test instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for 74LVT534DB,112 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
NXP Semiconductors is a global semiconductor leader delivering high-performance analog, logic, and interface solutions for automotive, industrial, and communication markets.
The 74LVT534DB,112 belongs to NXP's legacy LVT (Low-Voltage TTL) logic family, engineered specifically for seamless interoperability between 3.3 V logic cores and 5 V legacy buses in industrial and computing infrastructure.
FAQ
What is the maximum clock frequency supported by the 74LVT534DB,112?
The 74LVT534DB,112 supports a maximum clock frequency of 100 MHz over its full operating temperature range (–40 °C to +85 °C) at VCC = 2.7 V, and up to 150 MHz at VCC = 3.3 V under typical conditions. This is derived from AC characteristics specifying tPLH/tPHL ≤ 4.6 ns and minimum CP pulse width of 1.5 ns. The 74LVT534DB,112 achieves this performance using BiCMOS technology optimized for speed-power trade-offs in 3.3 V bus-interface applications.
Does the 74LVT534DB,112 require external pull-up resistors on its D inputs?
No, the 74LVT534DB,112 does not require external pull-up resistors on its D inputs because it integrates bus-hold circuitry on all eight D pins. This feature actively maintains the last-valid logic state when inputs are floating, with bus-hold current specified as ±75 µA to ±150 µA. This eliminates BOM cost and layout area associated with discrete pull-ups while improving noise immunity in industrial environments where signal lines may be unterminated.
Can the 74LVT534DB,112 safely interface with 5 V logic systems?
Yes, the 74LVT534DB,112 safely interfaces with 5 V logic systems: its inputs tolerate up to 5.5 V regardless of VCC, and outputs drive 5 V buses without loading current when disabled. The device meets 5 V-tolerant I/O specifications per its VI limits (0 V to 5.5 V) and zero bus-current loading claim in the datasheet. This allows direct connection to 5 V microcontrollers, memories, or peripherals without level translators-critical for backward-compatible upgrades in legacy equipment.
What happens to the outputs of the 74LVT534DB,112 during power-up?
During power-up, the 74LVT534DB,112 outputs enter a high-impedance 3-State condition before VCC reaches operational threshold, and remain there until supply stabilizes. This power-up 3-State behavior-explicitly documented in the datasheet-is enforced by internal circuitry that overrides OE logic until VCC exceeds ~1.2 V. As a result, the 74LVT534DB,112 prevents bus contention and spurious writes during power sequencing in multi-rail systems, eliminating need for external reset coordination.
Is the 74LVT534DB,112 pin-compatible with other packages in the 74LVT534 family?
Yes, the 74LVT534DB,112 shares identical pinout and functionality with other 74LVT534 variants including 74LVT534D (SOL) and 74LVT534PW (TSSOP), as confirmed by the common PIN CONFIGURATION diagram and identical PIN DESCRIPTION table across all ordering options. All three packages use the same 20-pin arrangement with OE, CP, GND, VCC, D0–D7, and Q0–Q7 mapped identically-enabling drop-in replacement across form factors without PCB redesign.
74LVT534DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 4.9ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Quiescent (Iq):
- 190 µA
- Input Capacitance:
- 4 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74LVT534DB,112 FAQ
1.How can I place an order for 74LVT534DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT534DB,112 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 74LVT534DB,112 reliable?
The price and inventory of 74LVT534DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT534DB,112 is usually 5 days.
3.What payment methods are accepted for 74LVT534DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT534DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT534DB,112?
74LVT534DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT534DB,112 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 74LVT534DB,112?
For technical support, including 74LVT534DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT534DB,112 requirements.
6.How does Aetrix verify that 74LVT534DB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT534DB,112 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 74LVT534DB,112 meets industry standards.
7.What is the process for return or replacement of 74LVT534DB,112?
All 74LVT534DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT534DB,112, 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 74LVT534DB,112 part is unused and in its original packaging.
Return procedure for 74LVT534DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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