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STMicroelectronics M74HC190RM13TR
- Part No.:
- M74HC190RM13TR
- Manufacturer:
- STMicroelectronics
- Category:
- Counters, Dividers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
M74HC190RM13TR.pdf
- Description:
- IC DECADE COUNTER 4-BIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,165
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Product details
Overview
M74HC190RM13TR from STMicroelectronics is a high-speed CMOS 4-bit synchronous up/down counter with TTL-compatible inputs, operating from 2V to 6V supply, featuring 44 MHz max clock frequency (typ. at VCC = 6V), 4 µA max quiescent current at 25°C, and active-low asynchronous parallel load, count enable, and ripple clock outputs - used in digital timing control, programmable logic sequencers, and multi-stage counter chains.
For engineers reviewing the M74HC190RM13TR datasheet, M74HC190RM13TR pinout, M74HC190RM13TR application, or M74HC190RM13TR equivalent, key selection criteria include synchronous edge-triggered counting behavior, MAX/MIN overflow/underflow flag generation, RCO carry/borrow signaling, and TSSOP-16 package compatibility with space-constrained industrial control PCBs.
Technical Context
The M74HC190RM13TR implements a fully synchronous 4-bit binary counter using silicon gate C2MOS technology, where all state transitions occur on the LOW-to-HIGH clock edge. Its D/U control input selects counting direction, while LOAD (active-low) enables immediate parallel data loading independent of clock phase.
It provides two dedicated status outputs: MAX/MIN indicates terminal count (0000 for down-count, 1111 for up-count), and RCO (Ripple Clock Output, active-low) generates cascaded carry/borrow pulses for multi-stage configurations. All inputs include ESD protection diodes rated for ±20 mA transient current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | High-speed CMOS (74HC), pin- and function-compatible with 74LS190 |
| Supply Voltage Range | 2V to 6V - supports mixed-voltage system interfacing and battery-powered operation |
| Max Clock Frequency | 44 MHz (typ. at VCC = 6V) - enables high-throughput counting in real-time control loops |
| Quiescent Supply Current | 4 µA (max at TA = 25°C) - ensures ultra-low standby power in always-on embedded systems |
| Output Drive Strength | ±4 mA (min) - sufficient to drive multiple 74HC inputs without buffering |
| Input Noise Immunity | VNIH/VNIL ≥ 28% VCC (min) - robust against supply noise and crosstalk in dense layouts |
| Propagation Delay (CLOCK→Q) | 20 ns (typ. at VCC = 6V) - tight timing margin for synchronous pipeline designs |
Pinout & Package
TSSOP-16 package (4.9 × 6.4 mm body, 0.65 mm pitch), thin shrink small outline, lead-free, RoHS-compliant, designed for automated surface-mount assembly and thermal reliability in industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 9–10, 15 | DATA A–D | Asynchronous parallel data inputs for presetting counter value on LOAD assertion |
| 2–3, 6–7 | QA–QD | 4-bit synchronous counter output bus, updated on rising clock edge |
| 4 | ENABLE | Active-low count enable - disables counting when HIGH, enables carry propagation in cascades |
| 5 | D/U | Count direction control: LOW = up-count, HIGH = down-count |
| 11 | LOAD | Active-low asynchronous parallel load - overrides current count with DATA inputs immediately |
| 12 | MAX/MIN | Terminal count flag: LOW at 1111 (up) or 0000 (down); used for wrap detection and state machine control |
| 13 | RCO | Ripple Clock Output (active-low): pulses on overflow/underflow for multi-stage carry/borrow chaining |
| 14 | CLOCK | Edge-triggered input: LOW-to-HIGH transition advances counter state synchronously |
| 8 | GND | Ground reference for all internal logic and I/O |
| 16 | VCC | Positive supply rail (2V–6V); powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous Up/Down Counting | Single-clock-edge operation with direction-selectable counting - eliminates race conditions in bidirectional sequencing |
| Asynchronous Parallel Load | Immediate value preset via DATA inputs regardless of clock phase - enables precise initialization and modulo-N reconfiguration |
| Dual Status Outputs (MAX/MIN + RCO) | Separate terminal count flag and ripple-clocked carry signal - supports both combinational and sequential cascade architectures |
| Wide Supply Range (2V–6V) | Operates across 3.3V and 5V logic domains without level shifters - simplifies mixed-supply board design |
| High Noise Immunity | 28% VCC input threshold hysteresis - maintains reliable operation in electrically noisy industrial enclosures |
Applications
| Industrial PLC Timer Modules | Digital Panel Meter Counting |
|---|---|
|
Use Scenario: Precise cycle counting in programmable logic controller timer blocks, where repeatable time intervals are derived from crystal-stabilized clocks. IC Role / Device Role / Timing Role: Synchronous counter generating fixed-duration timing windows via preset reload and MAX/MIN flag detection. Use Value: Enables deterministic 16-step timing resolution with zero clock-domain crossing latency between load and first count edge. |
Use Scenario: Bidirectional pulse accumulation in industrial panel meters measuring flow rate, RPM, or position feedback from quadrature encoders. IC Role / Device Role / Timing Role: Direction-sensitive event counter with real-time overflow indication for display update synchronization. Use Value: RCO output directly drives display refresh logic while MAX/MIN flags trigger alarm thresholds without CPU intervention. |
| Multi-Stage Frequency Dividers | Legacy Bus Address Decoding |
|
Use Scenario: Cascaded counters dividing high-frequency clock sources (e.g., 44 MHz) into sub-MHz timing references for peripheral controllers. IC Role / Device Role / Timing Role: Modular stage in synchronous divider chain using RCO as next-stage CLOCK input and ENABLE for gated division ratios. Use Value: Propagation delay matching (tPLH ≅ tPHL) ensures minimal skew accumulation across 4+ stages. |
Use Scenario: Generating chip-select signals in microcontroller-based systems with limited address lines, requiring modulo-10 or modulo-16 decoding. IC Role / Device Role / Timing Role: Programmable address counter that loads base addresses and increments/decrements on bus cycle strobes. Use Value: Active-low LOAD and ENABLE allow direct interface to 8051-style control buses without glue logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-bit synchronous up/down counter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC190DT | Same logic function, SOIC-16 package (5.3 mm width vs. TSSOP-16's 4.4 mm), slightly higher ICC (8 µA max) | Preferred where manual rework or legacy footprint compatibility is required over board space savings | Select when board layout uses SOIC pads or thermal mass requirements exceed TSSOP limits |
| 74AHC190PW | Higher speed (fMAX = 120 MHz at 5V), lower propagation delay (10 ns typ.), but reduced noise immunity (20% VCC) | Better suited for high-speed test equipment or FPGA companion logic, not industrial noise-prone environments | Choose only if timing budget demands <15 ns delays and EMI environment is controlled |
Compared with SN74HC190DT and 74AHC190PW, the M74HC190RM13TR offers optimal balance of low power (4 µA), industrial-grade noise immunity (28% VCC), and compact TSSOP packaging - making it preferred for space-constrained, battery-aware, and electrically noisy embedded timers.
Availability
M74HC190RM13TR is available at Aetrix Electronics and suitable for industrial PLC timer modules, digital panel meter counting, multi-stage frequency dividers, and legacy bus address decoding requiring stable component supply across extended temperature ranges (–55°C to +125°C).
Supply support for M74HC190RM13TR 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing and broad analog/mixed-signal portfolio.
The M74HC190 belongs to ST's legacy HC logic family - engineered for drop-in replacement of 74LS devices with CMOS power efficiency and enhanced noise margins, targeting industrial control, instrumentation, and legacy system upgrades.
FAQ
Is M74HC190RM13TR compatible with 5V TTL logic interfaces?
Yes - its VIH and VIL thresholds (3.15V/1.35V at VCC = 4.5V) meet TTL input voltage requirements, and output VOH/VOL (4.4V/0.26V at 4mA load) drive standard TTL inputs directly. No level-shifting circuitry is needed for interoperability with 74LS or 74F families.
Can M74HC190RM13TR operate reliably at –55°C?
Yes - the device is fully characterized from –55°C to +125°C per its Recommended Operating Conditions table. Quiescent current remains ≤80 µA, and propagation delays increase predictably (e.g., tPLH rises from 20 ns to 38 ns at VCC = 6V), enabling validated cold-temperature operation in outdoor industrial gear.
What is the function of the RCO pin during asynchronous LOAD?
RCO remains in its prior state during LOAD assertion and does not pulse - it only toggles on synchronous overflow/underflow events. This behavior ensures clean carry chaining: RCO reflects only clock-synchronized terminal counts, not preset-induced state changes.
Does M74HC190RM13TR require external pull-up resistors on ENABLE or LOAD pins?
No - ENABLE and LOAD are active-low CMOS inputs with no internal pull-ups; however, system-level pull-ups may be needed for fail-safe default states (e.g., ENABLE pulled HIGH to halt counting at power-up). Input leakage is ≤±1 µA, so weak pull-ups (e.g., 100 kΩ) suffice without loading the driver.
M74HC190RM13TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Counter, Decade
- Direction:
- Up, Down
- Number of Elements:
- 1
- Number of Bits per Element:
- 4
- Reset:
- -
- Timing:
- Synchronous
- Count Rate:
- 44 MHz
- Trigger Type:
- Positive Edge
- Voltage - Supply:
- 2 V ~ 6 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
M74HC190RM13TR FAQ
1.How can I place an order for M74HC190RM13TR through Aetrix?
Please submit a Request for Quotation (RFQ) for M74HC190RM13TR 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 M74HC190RM13TR reliable?
The price and inventory of M74HC190RM13TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M74HC190RM13TR is usually 5 days.
3.What payment methods are accepted for M74HC190RM13TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M74HC190RM13TR transactions.
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4.How is shipping managed for M74HC190RM13TR?
M74HC190RM13TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M74HC190RM13TR 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 M74HC190RM13TR?
For technical support, including M74HC190RM13TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M74HC190RM13TR requirements.
6.How does Aetrix verify that M74HC190RM13TR is sourced from the original manufacturer or authorized distributors?
All M74HC190RM13TR 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 M74HC190RM13TR meets industry standards.
7.What is the process for return or replacement of M74HC190RM13TR?
All M74HC190RM13TR units undergo pre-shipment inspection (PSI). If there is an issue with M74HC190RM13TR, 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 M74HC190RM13TR part is unused and in its original packaging.
Return procedure for M74HC190RM13TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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