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STMicroelectronics 74LCX16374TTR
- Part No.:
- 74LCX16374TTR
- Manufacturer:
- STMicroelectronics
- Category:
- Flip Flops
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74LCX16374TTR.pdf
- Description:
- IC FF D-TYPE DUAL 8BIT 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,218
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Product details
Overview
74LCX16374TTR from STMicroelectronics is a 16-bit non-inverting D-type flip-flop with 3-state outputs, 5V-tolerant I/O, and dual independent latch enable (1CK/2CK) and output enable (1OE/2OE) controls. It operates from 2.0V to 3.6V, delivers 150MHz min clock frequency at VCC = 3.0V, supports 24mA symmetrical drive, and is pin/function compatible with standard 74-series 16374 devices for 3.3V bus interfacing.
For engineers reviewing the 74LCX16374TTR datasheet, 74LCX16374TTR pinout, 74LCX16374TTR application, or 74LCX16374TTR equivalent, key selection criteria include 5V-tolerant I/O compatibility with legacy systems, balanced tPLH/tPHL propagation delays, power-down protection, PCI-bus-level drive capability at 24mA, and TSSOP-48 package suitability for high-density PCB layouts.
Technical Context
This device implements two independent 8-bit D-type latching sections, each with dedicated clock (nCK) and 3-state output enable (nOE), enabling asynchronous control of output states without disrupting internal register operation. Its C2MOS sub-micron process ensures low ICCQ (20µA) and supports data retention down to 1.5V.
Input and output structures incorporate integrated protection diodes, delivering HBM ESD >2000V and MM >200V robustness. The symmetrical |IOH| = IOL = 24mA (min) drive at VCC = 3.0V meets PCI bus signaling requirements while maintaining logic-level compatibility across 3.3V and 5V domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 3.6V operating; 1.5V data retention enables low-power suspend modes |
| fMAX | 150MHz minimum at VCC = 3.0V - enables high-speed data latching in 3.3V memory/address buffers |
| IOL / IOH | ±24mA minimum at VCC = 3.0V - meets PCI bus DC loading specs for direct interface |
| tPLH / tPHL | 1.5ns to 6.5ns (VCC = 2.7–3.6V) - balanced delays reduce timing skew in parallel data paths |
| VI / VO Tolerance | 0V to 5.5V input/output voltage range - allows safe connection to 5V logic without level shifters |
| ESD Rating | HBM >2000V, MM >200V - provides robust handling margin during board assembly and system integration |
| ICCQ | 20µA max at VCC = 2.7–3.6V - supports ultra-low static power in battery-backed or standby circuits |
Pinout & Package
TSSOP-48 package (4.4mm width, 12.6mm length, 1.2mm height), JEDEC MO-153 compliant, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24 | 1OE, 2OE | Active-low 3-state output enables - decouples each 8-bit section independently from bus |
| 4, 10, 15, 21, 28, 34, 39, 45 | 1D0–1D7 | Data inputs for first 8-bit latch section - sampled on rising edge of 1CK |
| 37–40, 43–44, 46–47 | 2D0–2D7 | Data inputs for second 8-bit latch section - sampled on rising edge of 2CK |
| 48, 25 | 1CK, 2CK | Independent positive-edge-triggered clock inputs - enable dual-channel synchronous capture |
| 2–3, 5–6, 8–9, 11–12 | 1Q0–1Q7 | 3-state non-inverting outputs for first section - high-impedance when 1OE = HIGH |
| 13–14, 16–17, 19–20, 22–23 | 2Q0–2Q7 | 3-state non-inverting outputs for second section - high-impedance when 2OE = HIGH |
| 4, 10, 15, 21, 28, 34, 39, 45 7, 18, 31, 42 | GND / VCC | Dual VCC (pins 7,18,31,42) and GND (pins 4,10,15,21,28,34,39,45) rails - reduce simultaneous switching noise |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant I/O | Supports mixed-voltage system design without external level translators |
| Symmetrical output drive | ±24mA at VCC = 3.0V ensures consistent rise/fall times and signal integrity on shared buses |
| Power-down protection | Inputs and outputs remain high-impedance and fault-safe when VCC = 0V |
| Latch-up immunity | Exceeds 500mA per JESD17 - prevents destructive latch-up under transient overvoltage |
| Dual independent control | Separate CK/OE pairs per 8-bit bank allow flexible partitioning of data flow in wide-bus applications |
Applications
| PCI Bus Interface | 3.3V/5V Mixed-Voltage Backplane |
|---|---|
Use Scenario: Interfacing a 3.3V FPGA or ASIC to a legacy 5V PCI slot via local bus buffer. IC Role / Device Role / Timing Role: Bidirectional 16-bit data latch with 5V-tolerant I/O, providing level translation and timing isolation between domains. Use Value: Eliminates discrete level shifters; maintains PCI-compliant drive strength (24mA) and timing margins (tW ≥ 3.0ns). | Use Scenario: Buffering address/data lines between 3.3V microcontroller and 5V peripheral controller in industrial PLC backplane. IC Role / Device Role / Timing Role: Synchronous 16-bit latch with independent OE/CK control per byte lane for selective bus arbitration. Use Value: Enables hot-swap-safe bus partitioning; power-down protection prevents backfeeding when one domain powers off. |
| Low-Power Memory Interface | High-Density FPGA I/O Expansion |
Use Scenario: Latching configuration data from serial EEPROM into a low-voltage FPGA during power-up sequencing. IC Role / Device Role / Timing Role: 16-bit non-inverting D-flip-flop with 1.5V data retention, used as a static configuration register. Use Value: Maintains valid state during brown-out; ICCQ ≤ 20µA minimizes standby current in always-on subsystems. | Use Scenario: Expanding I/O count of a Spartan-7 FPGA by adding 16-bit synchronized, tri-statable GPIO banks. IC Role / Device Role / Timing Role: Dual 8-bit latch with separate OE/CK enables time-multiplexed access to shared external peripherals. Use Value: Reduces FPGA pin count pressure; balanced tPLH/tPHL (≤6.5ns) preserves setup/hold timing across all 16 bits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit 3-state D-type latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC16374ADGGR | TI part; same TSSOP-48, 1.65–3.6V VCC range; 24mA drive; no 5V-tolerant inputs (max VI = VCC + 0.3V) | Requires external clamping or level-shifting for 5V input sources | Select when full 5V tolerance is unnecessary and TI supply chain preference applies |
| 74ALVC16374PAG | IDT part; TSSOP-48; 2.3–3.6V VCC; 24mA drive; 5V-tolerant I/O; slightly higher tPD (max 7.5ns) | Compatible drop-in replacement with identical functional behavior and voltage tolerance | Prefer for second-source assurance where STMicroelectronics lead times are constrained |
Compared with SN74LVC16374ADGGR and 74ALVC16374PAG, the 74LCX16374TTR uniquely combines 5V-tolerant I/O with 1.5V data retention and dual independent OE/CK control - critical for mixed-voltage hot-swap and low-power suspend applications where input voltage margin and state retention are design-critical.
Availability
74LCX16374TTR is available at Aetrix Electronics and suitable for PCI bus interfaces, 3.3V/5V mixed-voltage backplanes, and low-power memory configuration latching requiring stable component supply and long-term lifecycle support.
Supply support for 74LCX16374TTR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The 74LCX logic family targets high-speed, low-voltage 3.3V system interfacing with 5V legacy compatibility - optimized for PCI, backplane, and mixed-supply embedded applications requiring robust ESD, latch-up immunity, and precise timing control.
FAQ
Can 74LCX16374TTR be operated at 1.8V?
No. The recommended operating VCC range is 2.0V to 3.6V per datasheet Section "Recommended Operating Conditions". At 1.8V, parameters including fMAX, IOH/IOL, and VIH/VIL are not guaranteed; data retention is specified only down to 1.5V, not functional operation.
Does 74LCX16374TTR support hot-plug insertion in live 5V backplanes?
Yes - its 5V-tolerant inputs/outputs, power-down protection (inputs/outputs high-Z at VCC = 0V), and >500mA latch-up immunity per JESD17 make it suitable for controlled hot-plug scenarios when used with appropriate current-limiting and slew-rate control on signal lines.
What is the maximum capacitive load supported at 150MHz operation?
Per AC Electrical Characteristics table, CL = 50pF is used for fMAX and timing parameter characterization. Driving loads >50pF degrades tPLH/tPHL and increases skew; for 150MHz operation, maintain total node capacitance ≤50pF including trace, probe, and receiver input capacitance.
Are the two latch sections electrically isolated when one OE is asserted?
Yes - asserting 1OE or 2OE places only its associated 8 Q-outputs in high-impedance; internal latching continues unaffected for both sections. Data can be captured on either CK while the other section's outputs are disabled, enabling time-multiplexed bus sharing.
74LCX16374TTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74LCX
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- 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:
- 6.2ns @ 3.3V, 50pF
- Trigger Type:
- Positive Edge
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 2V ~ 3.6V
- Current - Quiescent (Iq):
- 20 µA
- Input Capacitance:
- 7 pF
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
74LCX16374TTR FAQ
1.How can I place an order for 74LCX16374TTR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LCX16374TTR 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 74LCX16374TTR reliable?
The price and inventory of 74LCX16374TTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCX16374TTR is usually 5 days.
3.What payment methods are accepted for 74LCX16374TTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCX16374TTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LCX16374TTR?
74LCX16374TTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LCX16374TTR 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 74LCX16374TTR?
For technical support, including 74LCX16374TTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCX16374TTR requirements.
6.How does Aetrix verify that 74LCX16374TTR is sourced from the original manufacturer or authorized distributors?
All 74LCX16374TTR 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 74LCX16374TTR meets industry standards.
7.What is the process for return or replacement of 74LCX16374TTR?
All 74LCX16374TTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LCX16374TTR, 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 74LCX16374TTR part is unused and in its original packaging.
Return procedure for 74LCX16374TTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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