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Texas Instruments SN74ALVCH162820DL
- Part No.:
- SN74ALVCH162820DL
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVCH162820DL.pdf
- Description:
- IC FF D-TYPE SNGL 10BIT 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:9,100
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Product details
Overview
SN74ALVCH162820DL from Texas Instruments is a 3.3-V, 10-bit edge-triggered D-type flip-flop with dual true outputs (Q1/Q2) per bit and 3-state output control, operating across 1.65 V to 3.6 V supply range, featuring bus-hold on all data inputs and integrated 26-Ω series output resistors for overshoot/undershoot suppression - used in high-density data buffering and bus interface applications in industrial control backplanes.
For engineers reviewing the SN74ALVCH162820DL datasheet, SN74ALVCH162820DL pinout, SN74ALVCH162820DL application, or SN74ALVCH162820DL equivalent, key selection considerations include its dual-output architecture, 56-pin SSOP (DL) package, -40°C to 85°C temperature rating, 150-MHz maximum clock frequency, and bus-hold input logic eliminating external pullup/pulldown components.
Technical Context
This device implements ten independent D-type flip-flops, each triggered on the positive edge of CLK, with synchronous data capture and dual buffered outputs (Q1 and Q2) delivering identical logic states. Output-enable (OE) controls all 20 outputs simultaneously into high-impedance or active drive states without affecting internal flip-flop operation.
It uses TI's EPIC™ submicron CMOS process and incorporates bus-hold circuitry on all 10 data inputs (D1–D10), ensuring stable logic levels on unused or floating inputs. The outputs are designed for ±12 mA drive capability and include on-die 26-Ω series termination to minimize signal integrity issues on PCB traces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.65 V to 3.6 V - supports mixed-voltage system interfacing including 1.8-V, 2.5-V, and 3.3-V domains |
| Max Clock Frequency | 150 MHz - enables high-speed data latching in timing-critical bus interfaces |
| Propagation Delay (tpd) | 5.4 ns typical at VCC = 3.3 V - ensures minimal latency between CLK↑ and Q output transition |
| Output Drive Strength | ±12 mA - sufficient to directly drive standard CMOS loads without external buffers |
| Input Bus-Hold Current | ±75 µA at VCC = 3 V - actively maintains valid logic state on unconnected D inputs |
| ESD Protection | >2000 V HBM - meets MIL-STD-883 Method 3015 for robust handling in manufacturing environments |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded systems and automation equipment |
Pinout & Package
The SN74ALVCH162820DL is housed in a 56-pin Plastic Shrink Small-Outline Package (SSOP), DL package type, with 0.5-mm lead pitch, JEDEC MO-118 compliant, body dimensions 18.54 mm × 7.59 mm × 2.79 mm (L × W × H), moisture sensitivity level (MSL) Level-1 at 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | Clock input | Positive-edge-triggered global clock for all 10 flip-flops; must meet minimum pulse width (3.3 ns) and transition rate (10 ns/V) |
| 1OE, 2OE | Output-enable inputs | Active-low enables/disables all 20 outputs; OE does not affect internal flip-flop state retention or clocking |
| D1–D10 | Data inputs | Asynchronous data inputs with integrated bus-hold; no external pullup/pulldown required when unused |
| 1Q1–10Q1, 1Q2–10Q2 | True outputs | Dual identical outputs per bit; each pair driven by same internal latch; 26-Ω series resistance reduces ringing |
| VCC, GND | Power terminals | Single-supply operation; requires local 0.1-µF bypass capacitor per VCC pin; multiple VCC/GND pins reduce noise coupling |
Key Features
| Feature | Design Value |
|---|---|
| Dual true outputs per bit | Provides redundant or split-bus drive capability - e.g., one output for local logic, second for backplane transmission |
| Integrated 26-Ω series output resistors | Eliminates need for external source-series termination, simplifying layout and reducing BOM count in high-speed routing |
| Bus-hold on all data inputs | Maintains last-valid logic state on floating D inputs, preventing metastability and eliminating discrete pull resistors |
| 3-state output control with OE independence | Allows concurrent data latching and bus release - critical for time-multiplexed shared-data-path architectures |
| Wide supply voltage range (1.65 V–3.6 V) | Enables interoperability across legacy 2.5-V and modern 1.8-V/3.3-V logic families without level-shifting circuitry |
Applications
| Industrial Backplane Buffering | High-Density Data Acquisition Interface |
|---|---|
Use Scenario: Isolating and synchronizing sensor data streams across a multi-slot PLC backplane with strict timing margins. IC Role / Device Role / Timing Role: Acts as a 10-bit synchronized latch with dual outputs - one set drives local FPGA logic, the other feeds differential bus transceivers. Use Value: Dual outputs eliminate need for duplicate latches; bus-hold prevents glitches during hot-swap events; 150-MHz clock tolerance accommodates oversampling requirements. | Use Scenario: Capturing parallel ADC outputs in a 10-channel medical imaging front-end where channel alignment and signal integrity are critical. IC Role / Device Role / Timing Role: Edge-triggered data capture element that aligns asynchronous analog-to-digital conversion results to a system master clock domain. Use Value: 5.4-ns tpd ensures sub-7-ns timing margin at 150 MHz; integrated 26-Ω resistors suppress reflections on 50-Ω trace layouts; wide VCC range supports mixed-supply ADC/FPGA integration. |
| Automated Test Equipment (ATE) Pattern Generator | Programmable Logic Controller I/O Expansion |
Use Scenario: Generating precise, synchronized stimulus vectors for digital IC functional testing using parallel pattern memory. IC Role / Device Role / Timing Role: High-speed output register staging test patterns onto device-under-test (DUT) pins with deterministic setup/hold timing. Use Value: 1.4-ns tsu at 1.8 V allows tight pattern launch windows; 3-state outputs enable bidirectional pin reuse; OE-controlled high-Z state supports readback verification cycles. | Use Scenario: Expanding discrete I/O capacity in modular PLC racks where space-constrained modules require compact, reliable latching. IC Role / Device Role / Timing Role: Latching field I/O status signals from optocoupled inputs into a centralized controller bus with noise immunity. Use Value: Bus-hold eliminates external biasing on isolated inputs; -40°C to +85°C rating ensures operation in harsh cabinet environments; SSOP package fits narrow DIN-rail carrier footprints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit dual-output flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ALVCH16373DL | Octal transparent latch (not edge-triggered); single output per bit; no dual-Q architecture | Suitable for level-sensitive gating but lacks synchronous sampling capability required for clock-domain crossing | Select only when latch behavior (not flip-flop) and lower pin count are acceptable |
| SN74LVC16373ADL | Wider VCC range (1.65 V–5.5 V); no bus-hold; higher ICC (120 µA vs. 40 µA); no integrated 26-Ω resistors | Compatible with 5-V legacy systems but requires external termination and pull resistors for noise immunity | Choose when 5-V tolerance is mandatory and board space permits added passives |
Compared with SN74ALVCH162820DL, SN74ALVCH16373DL lacks edge-triggered operation and dual outputs, limiting timing precision and flexibility; SN74LVC16373ADL trades bus-hold and on-die termination for broader voltage support, increasing design complexity in noise-sensitive industrial layouts.
Availability
SN74ALVCH162820DL is available at Aetrix Electronics and suitable for industrial backplane buffering, high-density data acquisition interfaces, automated test equipment pattern generation, and programmable logic controller I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ALVCH162820DL 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 U.S.-based semiconductor company specializing in analog, embedded processing, and logic solutions, with over 50 years of leadership in high-reliability industrial and automotive electronics.
The SN74ALVCH162820DL belongs to TI's Widebus™ family of advanced logic devices, engineered specifically for high-speed, low-voltage bus interface and data synchronization in space-constrained industrial control systems.
FAQ
What is the recommended power-up sequence for SN74ALVCH162820DL to ensure predictable 3-state behavior?
TI recommends tying OE to VCC through a pullup resistor during power-up and power-down to guarantee high-impedance outputs. The minimum resistor value depends on the driver's current-sinking capability; for most cases, a 10-kΩ resistor suffices. This prevents bus contention before system initialization completes. The SN74ALVCH162820DL itself does not require a specific VCC ramp rate, but stable supply must be established before applying CLK or data. Always verify OE state before releasing reset in firmware.
Does SN74ALVCH162820DL support mixed-voltage operation between its inputs and outputs?
Yes - the SN74ALVCH162820DL supports mixed-voltage operation: inputs tolerate voltages up to VCC + 0.5 V (max 4.6 V), and outputs swing rail-to-rail within the VCC range (1.65 V–3.6 V). This allows interfacing with 1.8-V drivers while powered at 2.5 V or 3.3 V. However, VIH/VIL thresholds scale with VCC, so proper logic-level translation must be verified per supply condition. The SN74ALVCH162820DL does not include built-in level shifters; external biasing may be needed for non-monotonic voltage combinations.
How does the bus-hold feature on SN74ALVCH162820DL interact with externally pulled inputs?
The bus-hold circuitry on SN74ALVCH162820DL actively reinforces the last-seen logic state on D inputs but yields to stronger external signals. If an external pullup or pulldown resistor delivers more than ±75 µA (e.g., ≤67 kΩ at 3.3 V), it will override bus-hold. For reliable override, TI recommends external resistors ≤10 kΩ. In practice, bus-hold eliminates pull resistors for truly floating inputs but coexists safely with intentional biasing - no conflict occurs, and the SN74ALVCH162820DL remains functional under either configuration.
Can SN74ALVCH162820DL drive standard 50-Ω transmission lines directly without external termination?
No - the SN74ALVCH162820DL's integrated 26-Ω series resistors are optimized for suppressing overshoot/undershoot on short, unterminated PCB traces (e.g., <10 cm), not for impedance matching to 50-Ω lines. Driving a true 50-Ω load requires additional series or parallel termination. Using the SN74ALVCH162820DL alone into 50 Ω results in ~2:1 mismatch (26 Ω vs. 50 Ω), causing partial reflections. For clean 50-Ω signaling, add a 24-Ω series resistor (26 Ω + 24 Ω ≈ 50 Ω) or use a dedicated line-driver buffer.
Is SN74ALVCH162820DL pin-compatible with any earlier-generation TI flip-flops like SN74ALVCH162235?
No - SN74ALVCH162820DL is not pin-compatible with SN74ALVCH162235 or other members of the ALVCH16xxx family. While both are 56-pin SSOP flip-flops, SN74ALVCH162235 is a 12-bit registered transceiver with different pin allocation (e.g., separate A/B buses, direction control), whereas SN74ALVCH162820DL has dedicated CLK, dual Q outputs per bit, and two OE inputs. Pinouts differ fundamentally; PCB redesign is required. Always validate against the DL-package top-view diagram in SCES012H before substitution.
SN74ALVCH162820DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVCH
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 1
- Number of Bits per Element:
- 10
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 5.4ns @ 3.3V, 30pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 40 µA
- Input Capacitance:
- 3.5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
SN74ALVCH162820DL FAQ
1.How can I place an order for SN74ALVCH162820DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVCH162820DL 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 SN74ALVCH162820DL reliable?
The price and inventory of SN74ALVCH162820DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH162820DL is usually 5 days.
3.What payment methods are accepted for SN74ALVCH162820DL?
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4.How is shipping managed for SN74ALVCH162820DL?
SN74ALVCH162820DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ALVCH162820DL 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 SN74ALVCH162820DL?
For technical support, including SN74ALVCH162820DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH162820DL requirements.
6.How does Aetrix verify that SN74ALVCH162820DL is sourced from the original manufacturer or authorized distributors?
All SN74ALVCH162820DL 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 SN74ALVCH162820DL meets industry standards.
7.What is the process for return or replacement of SN74ALVCH162820DL?
All SN74ALVCH162820DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH162820DL, 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 SN74ALVCH162820DL part is unused and in its original packaging.
Return procedure for SN74ALVCH162820DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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