My Inquiry
My Account
STMicroelectronics M74HCT373RM13TR
- Part No.:
- M74HCT373RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Latches
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
M74HCT373RM13TR.pdf
- Description:
- IC D-TYPE TRANSP SGL 8:8 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:494
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
M74HCT373RM13TR from STMicroelectronics is a high-speed CMOS octal D-type latch with 3-state non-inverting outputs, designed for bus-oriented data latching in digital systems. It features 8-bit transparent latching controlled by LE (latch enable) and OE (output enable), tPD = 19 ns (typ.) at VCC = 4.5 V, ICC ≤ 4 µA (max.) at TA = 25°C, and TTL-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Used in microprocessor address/data bus buffering and memory interface control.
For engineers reviewing the M74HCT373RM13TR datasheet, M74HCT373RM13TR pinout, M74HCT373RM13TR application, or M74HCT373RM13TR equivalent, key selection criteria include 3-state output timing (tPZL/tPLZ ≤ 45 ns), symmetrical drive strength (|IOH|/IOL ≥ 6 mA), latch enable pulse width (tW(H) ≥ 8 ns min), and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The M74HCT373RM13TR implements an 8-bit transparent latch architecture where Q outputs follow D inputs when LE is high, and hold the last D state when LE transitions low. Its dual-control logic (LE for data capture, OE for output tri-state) enables precise bus arbitration in shared-data-path systems.
Designed using sub-micron silicon gate C2MOS technology, it delivers balanced propagation delays (tPLH ≅ tPHL), symmetrical output impedance, and integrated ESD/transient protection on all inputs-ensuring robust operation in industrial-level noise environments without external clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| tPD | 19 ns typical at VCC = 4.5 V - defines maximum data-to-output delay for timing-critical bus handshaking |
| ICC | ≤ 4 µA max at TA = 25°C - enables ultra-low static power in always-on control logic |
| VIL / VIH | 0.8 V max / 2.0 V min - ensures reliable interfacing with standard TTL output stages |
| IOL / IOH | ≥ 6 mA - supports direct driving of multiple CMOS/TTL loads without buffer amplification |
| tW(H) | ≥ 8 ns minimum LE pulse width - sets minimum clock or strobe duration for guaranteed latch capture |
| CPD | 66 pF - used to calculate dynamic supply current (ICC(opr) = CPD × VCC × fIN + ICC/8) |
| Top | −55°C to +125°C - qualified for extended industrial and automotive under-hood applications |
Pinout & Package
TSSOP-20 (Thin Shrink Small Outline Package), 0.65 mm pitch, 6.5 mm × 4.4 mm body, lead-free and RoHS-compliant per STMicroelectronics specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OE | Active-low 3-state output enable - disables all Q outputs to high-impedance when high |
| 2,5,6,9,12,15,16,19 | Q0–Q7 | Non-inverting latched data outputs - drive bidirectional data buses when OE = low |
| 3,4,7,8,13,14,17,18 | D0–D7 | Data inputs - sampled on LE falling edge and held until next LE transition |
| 11 | LE | Latch enable - Q follows D when high; latches D value on falling edge |
| 10 | GND | Ground reference - must be connected to system 0 V plane for noise immunity |
| 20 | VCC | Positive supply - operates over 4.5–5.5 V; decoupling capacitor required at pin |
Key Features
| Feature | Design Value |
|---|---|
| 3-State Output Control | Independent OE input allows dynamic bus release without affecting latch state |
| High-Speed Latching | 19 ns typical propagation delay enables use in 25+ MHz bus cycles |
| TTL-Compatible Inputs | VIH ≥ 2.0 V / VIL ≤ 0.8 V eliminates need for level-shifting with legacy controllers |
| ESD Protection | Integrated input protection circuits withstand ±2 kV HBM per JESD22-A114 |
| Wide Temperature Range | Specified from −55°C to +125°C supports deployment in harsh environmental enclosures |
Applications
| Microprocessor Bus Interface | Memory Address Latching |
|---|---|
Use Scenario: Isolating and holding address/data lines between CPU and peripheral ICs during multi-cycle transactions. IC Role / Device Role / Timing Role: Acts as transparent latch during LE high, then holds stable address while data transfers occur. Use Value: Eliminates bus contention by enabling clean separation of address setup and data transfer phases. | Use Scenario: Capturing row/column addresses for DRAM or SRAM access in embedded controllers. IC Role / Device Role / Timing Role: Latches multiplexed address bits before memory decoding and enables 3-state release post-access. Use Value: Reduces pin count on MCU while maintaining full parallel memory bandwidth. |
| Industrial I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Buffering and isolating GPIO signals in PLC modules with hot-swap capability. IC Role / Device Role / Timing Role: Provides latch-controlled output staging and OE-gated bus disconnection during firmware updates. Use Value: Prevents spurious output transitions during configuration changes, improving system reliability. | Use Scenario: Synchronizing and holding test pattern vectors in automated test equipment (ATE) stimulus boards. IC Role / Device Role / Timing Role: Captures parallel digital patterns from FPGA sequencers and presents stable outputs to DUT pins. Use Value: Ensures deterministic signal timing with <45 ns output enable/disable skew across all 8 channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal latch with 3-state output applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT373PW | TSSOP-20, identical AC/DC specs, TI's characterization includes tighter VCC = 4.75–5.25 V range | Same bus-interface role; minor timing variance (<2 ns) in tPLH at 5 V | Select when sourcing from TI-authorized channels or requiring TI-specific qualification reports |
| 74VHC373FT | Smaller CPD (50 pF vs. 66 pF), higher VCC max (5.5 V), but lower IOL (4 mA vs. 6 mA) | Lower power in high-frequency operation, but reduced drive margin for heavy bus loads | Prefer for battery-powered instrumentation where dynamic current dominates total power budget |
Compared with SN74HCT373PW and 74VHC373FT, the M74HCT373RM13TR offers superior output drive (6 mA), broader temperature support (−55°C to +125°C), and STMicroelectronics' long-term industrial lifecycle commitment-making it optimal for mission-critical embedded control.
Availability
M74HCT373RM13TR is available at Aetrix Electronics and suitable for microprocessor bus interface, memory address latching, and industrial I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for M74HCT373RM13TR 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, Switzerland, delivering intelligent power, analog, MEMS, and microcontroller solutions for industrial, automotive, and consumer markets.
The M74HCT373 belongs to ST's high-speed HCT logic family, engineered specifically for TTL-compatible, low-power, bus-oriented digital interfacing in space-constrained industrial control systems.
FAQ
What is the recommended decoupling capacitor for M74HCT373RM13TR?
A 100 nF ceramic capacitor placed within 3 mm of VCC (pin 20) and GND (pin 10) is required per STMicroelectronics layout guidelines. This minimizes switching noise-induced ground bounce and ensures stable 3-state transitions under 6 mA load conditions.
Can M74HCT373RM13TR operate at 3.3 V?
No. The device is specified only for VCC = 4.5–5.5 V per its Recommended Operating Conditions table. At 3.3 V, VIH/VIL thresholds are not met, and output drive falls below 6 mA-risking logic misreads and bus contention.
Is the M74HCT373RM13TR pin-compatible with older DIP-20 versions?
Yes-pinout and logic function are identical to M74HCT373B1R (DIP) and M74HCT373M1R (SO-20). Only package dimensions and thermal characteristics differ; no PCB redesign is needed when migrating to TSSOP-20.
Does OE control affect internal latch state?
No. OE only gates the output drivers; the internal latch state (Q0–Q7) remains unchanged regardless of OE level. Data retention is fully independent of OE, allowing safe bus release without data loss.
M74HCT373RM13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- D-Type Transparent Latch
- Circuit:
- 8:8
- Output Type:
- Tri-State
- Voltage - Supply:
- 4.5V ~ 5.5V
- Independent Circuits:
- 1
- Delay Time - Propagation:
- 19ns
- Current - Output High, Low:
- 6mA, 6mA
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
M74HCT373RM13TR FAQ
1.How can I place an order for M74HCT373RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HCT373RM13TR 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 M74HCT373RM13TR reliable?
The price and inventory of M74HCT373RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HCT373RM13TR is usually 5 days.
3.What payment methods are accepted for M74HCT373RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HCT373RM13TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M74HCT373RM13TR?
M74HCT373RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HCT373RM13TR 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 M74HCT373RM13TR?
For technical support, including M74HCT373RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HCT373RM13TR requirements.
6.How does Aetrix verify that M74HCT373RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HCT373RM13TR 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 M74HCT373RM13TR meets industry standards.
7.What is the process for return or replacement of M74HCT373RM13TR?
All M74HCT373RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HCT373RM13TR, 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 M74HCT373RM13TR part is unused and in its original packaging.
Return procedure for M74HCT373RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M74HCT373RM13TR Tags
-
SN74HC573APWR
Texas Instruments
-
SN74HC573ADWR
Texas Instruments
-
SN74AHC573PWR
Texas Instruments
-
SN74HCT573DWR
Texas Instruments
-
SN74HC373N
Texas Instruments
-
SN74HC573AN
Texas Instruments
-
74VHC573MTCX
onsemi
-
MC74LCX573DTR2G
onsemi
-
74AUP1G373GW,125
Nexperia USA Inc.
-
SN74LVC1G373DCKR
Texas Instruments
-
SN74LVC1G373DBVR
Texas Instruments
-
NC7SZ373P6X
onsemi
Tech Hub
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
