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Texas Instruments SN74LVCH16374AZQLR
- Part No.:
- SN74LVCH16374AZQLR
- Manufacturer:
- Texas Instruments
- Category:
- Flip Flops
- Package:
- 56-VFBGA
- Datasheet:
-
SN74LVCH16374AZQLR.pdf
- Description:
- IC FF D-TYPE DUAL 8BIT 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,307
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Product details
Overview
SN74LVCH16374AZQLR from Texas Instruments is a 16-bit edge-triggered D-type flip-flop with 3-state outputs, designed for 1.65 V to 3.6 V operation. It features dual 8-bit banks (1Q1–1Q8 and 2Q1–2Q8), independent output-enable (1OE/2OE) and clock (1CLK/2CLK) inputs, 5.5-V-tolerant inputs, and bus-hold on all data inputs - enabling robust data latching in mixed-voltage server and networking bus interfaces.
For engineers reviewing the SN74LVCH16374AZQLR datasheet, SN74LVCH16374AZQLR pinout, SN74LVCH16374AZQLR application, or SN74LVCH16374AZQLR equivalent, key selection criteria include its 4.5 ns max propagation delay at 3.3 V, ±24 mA output drive capability, Ioff support for live insertion, 3.6-V-compatible 5.5-V-tolerant inputs, and TSSOP-48 package with verified 0.5-mm pitch pin mapping.
Technical Context
This device implements two independent 8-bit positive-edge-triggered D flip-flop banks, each with dedicated 3-state output control. Each bank supports simultaneous parallel loading of 8-bit data on CLK↑, with OE gating output drivers without affecting internal state retention.
Its Ioff circuitry disables all outputs when VCC = 0 V, preventing back-drive current during partial power-down. Bus-hold circuitry actively maintains valid logic levels on un-driven D inputs, eliminating external pull resistors while ensuring noise-immune static input states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - enables direct integration into 1.8-V, 2.5-V, and 3.3-V logic domains without level shifters. |
| Input Voltage Tolerance | Up to 5.5 V - allows interfacing with legacy 5-V controllers or sensors while powered from 3.3-V rails. |
| tpd (max) | 4.5 ns at VCC = 3.3 V - supports reliable 150-MHz clock operation in high-speed data capture and bus buffering. |
| IOL / IOH (max) | ±24 mA at VCC = 3.0 V - drives multiple CMOS loads or moderate-current peripherals (e.g., LEDs, small FET gates) directly. |
| Bus-Hold Current | ±45 μA at VCC = 2.3 V - maintains stable logic state on floating inputs without external biasing components. |
| Ioff Leakage | ±10 μA at VI/VO = 5.5 V, VCC = 0 V - ensures safe hot-plug operation and prevents backflow damage during power sequencing. |
| Operating Temperature | –40°C to +125°C - qualified for industrial and extended-temperature embedded systems including network switches and servers. |
Pinout & Package
The SN74LVCH16374AZQLR is packaged in a 48-pin TSSOP (DGG) with 0.5-mm pitch, body size 12.50 mm × 6.10 mm, and exposed pad not present. Pin assignments follow TI's standard ZQL variant layout, confirmed via official datasheet Table 1 and top-view diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-Low Output Enable | Independently controls 3-state output drivers for Bank 1 (pins 2–12) and Bank 2 (pins 13–23); OE = high → high-Z output. |
| 1CLK, 2CLK | Positive-Edge Clock Input | Triggers parallel load of corresponding D-input bank (1D1–1D8 or 2D1–2D8) on rising edge; asynchronous to other bank. |
| 1D1–1D8, 2D1–2D8 | Data Inputs | Eight dedicated D inputs per bank; all feature integrated bus-hold to retain last-valid state when un-driven. |
| 1Q1–1Q8, 2Q1–2Q8 | 3-State Output | Eight buffered, high-drive outputs per bank; tri-stated when respective OE is high; VOL ≤ 0.55 V @ 24 mA. |
| VCC (pins 7, 18, 31, 42) | Power Supply | Four distributed VCC pins reduce supply impedance and improve noise immunity across high-speed switching banks. |
| GND (pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground Reference | Eight GND pins provide low-inductance return paths for 16 outputs and internal logic, critical for signal integrity at 150 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.65–3.6 V) | Enables single-supply operation across 1.8-V, 2.5-V, and 3.3-V system domains without voltage translation. |
| 5.5-V-tolerant inputs | Permits direct connection to 5-V microcontrollers or sensors while operating from 3.3-V rails - no external clamping needed. |
| Ioff partial-power-down protection | Blocks damaging current flow between powered and unpowered system sections during hot-swap or staggered power-up sequences. |
| Integrated bus-hold on all D inputs | Eliminates need for 10-kΩ external pull-up/down resistors on unused data lines - reduces BOM count and board space. |
| High-output drive (±24 mA) | Drives up to 10 LVTTL loads or directly sources/sinks LEDs, relays, or gate drivers without buffer amplification. |
| Low ground bounce (VOLP < 0.8 V) | Maintains signal integrity under heavy capacitive loading by minimizing simultaneous switching noise on shared GND paths. |
Applications
| Server Memory Buffering | Industrial PLC I/O Expansion |
|---|---|
|
Use Scenario: Latching address/data signals between a 3.3-V CPU and DDR memory modules in rack-mounted servers. IC Role / Device Role / Timing Role: 16-bit registered buffer providing setup/hold margin and isolation between mismatched timing domains. Use Value: 4.5 ns tpd and 150-MHz fmax ensure cycle-accurate data capture; 5.5-V tolerance accommodates legacy 5-V memory controller signaling. |
Use Scenario: Interfacing 24-V digital field inputs to a 3.3-V FPGA-based logic controller in factory automation cabinets. IC Role / Device Role / Timing Role: Level-translating input latch with bus-hold, converting noisy industrial signals into clean FPGA-readable data. Use Value: Bus-hold eliminates external pull resistors on unterminated field wiring; Ioff prevents backfeed during module hot-swap maintenance. |
| Network Switch Data Path | Wearable Health Sensor Hub |
|
Use Scenario: Synchronizing packet header metadata across parallel lanes in a 10-Gbps Ethernet switch ASIC interface. IC Role / Device Role / Timing Role: Dual-bank edge-triggered register aligning timestamp and priority bits before forwarding to MAC layer. Use Value: Independent 1CLK/2CLK and 1OE/2OE enable staggered pipeline staging; ±24 mA drive sustains signal integrity over 10-cm PCB traces. |
Use Scenario: Aggregating analog sensor readings (ECG, SpO₂, motion) from multiple ADCs into a low-power ARM Cortex-M0+ MCU. IC Role / Device Role / Timing Role: Low-voltage (1.8-V) data latch buffering burst-mode sensor outputs prior to serial transfer. Use Value: 1.65-V minimum VCC allows operation from coin-cell–supplied LDO; bus-hold prevents spurious reads during intermittent sensor wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit D-type flip-flop applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16374ADGGR | Lacks bus-hold and Ioff; 3.6-V max VCC only; identical pinout and timing. | Not suitable for hot-swap or floating-input environments; requires external pull resistors. | Select when cost sensitivity outweighs robustness requirements and system design guarantees driven inputs. |
| 74ALVCH16374TTR | Higher speed (tpd = 3.2 ns @ 3.3 V); same VCC range and bus-hold; different pinout (TSSOP-48 but non-ZQL mapping). | Requires PCB redesign due to incompatible pin assignment; better for latency-critical applications. | Choose only if tpd reduction is critical and layout revision is feasible; verify ZQL vs. TTR pin compatibility. |
Compared with SN74LVCH16374AZQLR, SN74LVC16374ADGGR offers lower cost but sacrifices bus-hold and Ioff protection, while 74ALVCH16374TTR improves speed at the expense of pin compatibility - making SN74LVCH16374AZQLR the optimal balance of robustness, compatibility, and performance for mixed-voltage industrial designs.
Availability
SN74LVCH16374AZQLR is available at Aetrix Electronics and suitable for server memory buffering, industrial PLC I/O expansion, network switch data path synchronization, and wearable health sensor hub applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVCH16374AZQLR 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 decades of expertise in high-reliability interface and timing ICs.
The SN74LVCH16374AZQLR belongs to TI's Widebus™ family of advanced CMOS logic devices, engineered specifically for robust, mixed-voltage bus interfacing in servers, networking equipment, and industrial control systems.
FAQ
What is the maximum clock frequency supported by the SN74LVCH16374AZQLR?
The SN74LVCH16374AZQLR supports a maximum clock frequency of 150 MHz across its full operating voltage range (1.65 V to 3.6 V), as specified in the Switching Characteristics table under fmax. This rating is validated at VCC = 2.7 V ± 0.15 V and TA = 25°C, with timing margins maintained down to –40°C and up to +125°C per Recommended Operating Conditions.
Does the SN74LVCH16374AZQLR require external pull-up or pull-down resistors on its data inputs?
No, the SN74LVCH16374AZQLR does not require external pull-up or pull-down resistors on its D inputs because it integrates active bus-hold circuitry on all 16 data pins. This feature maintains the last-valid logic state on un-driven or floating inputs, eliminating BOM overhead and improving noise immunity in industrial and server environments where signal routing may leave inputs unterminated.
Can the SN74LVCH16374AZQLR interface safely between 5-V and 3.3-V systems?
Yes, the SN74LVCH16374AZQLR safely interfaces 5-V and 3.3-V systems: its inputs accept voltages up to 5.5 V regardless of VCC (which operates from 1.65 V to 3.6 V), enabling direct connection to 5-V microcontrollers or sensors. Outputs swing rail-to-rail (0 V to VCC), so when powered from 3.3 V, they deliver clean 3.3-V logic levels compatible with downstream 3.3-V receivers.
What is the purpose of the Ioff feature in the SN74LVCH16374AZQLR?
The Ioff feature in the SN74LVCH16374AZQLR disables all output drivers when VCC = 0 V, preventing damaging current backflow from live system buses into the unpowered IC. This enables safe live insertion and partial-power-down operation in modular systems like blade servers or hot-swappable I/O cards, where subsystems may be powered independently or sequenced.
How many power and ground pins does the SN74LVCH16374AZQLR have in its TSSOP-48 package?
The SN74LVCH16374AZQLR in the TSSOP-48 (DGG) package has four VCC pins (pins 7, 18, 31, 42) and eight GND pins (pins 4, 10, 15, 21, 28, 34, 39, 45), as confirmed in the Pin Configuration and Functions section of the official datasheet. This distributed power/ground architecture minimizes supply impedance and improves noise rejection for high-speed 16-bit parallel operation.
SN74LVCH16374AZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVCH
- Package/Case:
- 56-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Standard
- Type:
- D-Type
- Output Type:
- Tri-State, Non-Inverted
- Number of Elements:
- 2
- Number of Bits per Element:
- 8
- Clock Frequency:
- 150 MHz
- Max Propagation Delay @ V, Max CL:
- 4.5ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 5 pF
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-BGA Microstar Junior (7x4.5)
SN74LVCH16374AZQLR FAQ
1.How can I place an order for SN74LVCH16374AZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVCH16374AZQLR 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 SN74LVCH16374AZQLR reliable?
The price and inventory of SN74LVCH16374AZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVCH16374AZQLR is usually 5 days.
3.What payment methods are accepted for SN74LVCH16374AZQLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVCH16374AZQLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVCH16374AZQLR?
SN74LVCH16374AZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVCH16374AZQLR 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 SN74LVCH16374AZQLR?
For technical support, including SN74LVCH16374AZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVCH16374AZQLR requirements.
6.How does Aetrix verify that SN74LVCH16374AZQLR is sourced from the original manufacturer or authorized distributors?
All SN74LVCH16374AZQLR 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 SN74LVCH16374AZQLR meets industry standards.
7.What is the process for return or replacement of SN74LVCH16374AZQLR?
All SN74LVCH16374AZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVCH16374AZQLR, 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 SN74LVCH16374AZQLR part is unused and in its original packaging.
Return procedure for SN74LVCH16374AZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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