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Texas Instruments MM5452VX/NOPB
- Part No.:
- MM5452VX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Display Drivers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
MM5452VX/NOPB.pdf
- Description:
- IC DRVR 7 SEG 4 1/2 DIGIT 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:1,973
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Product details
Overview
MM5452VX/NOPB from Texas Instruments is a monolithic CMOS LCD segment driver IC in 44-pin PLCC package, capable of driving up to 32 LCD segments with serial data input, no load signal required, and wide 3V–10V supply operation. It supports 4½-digit 7-segment displays and cascaded configurations for expanded digit count in instrumentation readouts.
For engineers reviewing the MM5452VX/NOPB datasheet, MM5452VX/NOPB pinout, MM5452VX/NOPB application, or MM5452VX/NOPB equivalent, key selection criteria include segment sink/source current (±40 µA @ 3V), backplane output frequency (75 Hz), clock input frequency support (up to 1 MHz), and TTL-compatible serial interface timing.
Technical Context
The MM5452VX/NOPB implements a static master-slave shift register architecture with 32-bit serial data latching after 36 clock cycles, enabling non-multiplexed direct drive to LCD segments. Its DATA ENABLE function replaces the 33rd output found on the MM5453 variant, distinguishing its control logic.
It operates with internal RC oscillator (75 Hz backplane frequency at ROSC_IN=50kΩ/COSC_IN=0.01µF) or external 50% duty-cycle clock, supporting synchronization with AC power or DVM integration time to suppress display interference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3V to 10V - enables direct compatibility with battery-powered (3V) and industrial rail (10V) systems without level-shifting. |
| Segment Sink/Source Current | ±40 µA @ VDD=3V - sufficient for low-power reflective LCDs used in digital thermometers and remote indicators. |
| Backplane Output Frequency | 75 Hz - matches standard LCD AC drive requirements to prevent electrolytic degradation and image retention. |
| Max Clock Input Frequency | 1.0 MHz @ VDD=10V - allows fast serial update rates for dynamic multi-digit displays without visible flicker. |
| Input Logic Thresholds | VIL ≤ 0.8V / VIH ≥ 2.0V (VDD=5V) - ensures robust TTL/CMOS interface with microcontrollers and COPS™ systems. |
| Operating Temperature | −40°C to +85°C - qualified for industrial control panels and outdoor instrumentation environments. |
| Average Supply Current | 40 µA @ VDD=10V - ultra-low quiescent power ideal for long-life battery-operated meters and portable devices. |
Pinout & Package
MM5452VX/NOPB uses a 44-pin Plastic Leaded Chip Carrier (PLCC) package per TI package code FN0044A, with 4.57 mm max height and gull-wing leads. Pin 1 is marked by an optional corner chamfer or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive Power Supply | Accepts 3V–10V DC; powers all internal logic and output drivers. |
| VSS | Ground Reference | Common return path for logic and segment/backplane outputs. |
| DATA | Serial Data Input | MSB-first 32-bit segment data preceded by start bit "1"; no separate load signal needed. |
| CLOCK | Serial Clock Input | Drives internal shift register; requires 40–60% duty cycle for stable operation. |
| DATA ENABLE | Output Enable Control | Active-high signal enabling segment outputs; replaces 33rd output of MM5453. |
| ROSC_IN / COSC_IN | Oscillator Timing Inputs | RC network connection point for internal backplane clock generation (75 Hz typical). |
| BP_OUT | Backplane Output | Drives common LCD backplane electrode with ±500 µA sink/source capability. |
| Pins 18–40 (except VDD/VSS) | Segment Outputs | 32 dedicated segment drivers (bit 1 → pin 20, bit 2 → pin 21, ..., bit 32 → pin 17); pin mapping follows TI Figure 2 layout. |
Key Features
| Feature | Design Value |
|---|---|
| Serial Interface with No Load Signal | 32-bit data loaded automatically after 36 clocks - eliminates external latch control lines and simplifies MCU firmware. |
| Cascaded Operation Support | Multiple MM5452VX/NOPB units can be daisy-chained via DATA OUT → DATA IN - scales to >32 segments without additional controllers. |
| Alphanumeric & Bar Graph Capability | All 32 outputs individually controllable - supports custom character sets, analog bar graphs, and status indicators beyond 7-segment digits. |
| Wide Supply Voltage Range | 3V–10V operation - accommodates single-cell Li-ion (3.3V), dual AA (3V), and industrial 5V/9V rails without regulators. |
| External Clock Synchronization | Accepts external 50% duty-cycle clock - enables noise-free display drive synchronized to AC line or ADC conversion timing. |
Applications
| Digital Voltmeter Readout | Industrial Panel Indicator |
|---|---|
Use Scenario: A handheld DVM displays 4½-digit voltage measurements with high-contrast reflective LCD under variable lighting. IC Role / Device Role / Timing Role: MM5452VX/NOPB drives all 32 segments directly using serial data from MCU, generating precise 75 Hz backplane waveform. Use Value: Eliminates need for external segment decoder or multiplex controller; low 40 µA supply current extends battery life. |
Use Scenario: Factory floor HMI panel shows temperature, pressure, and status codes using fixed-segment LCDs in harsh EMI environments. IC Role / Device Role / Timing Role: MM5452VX/NOPB acts as isolated display interface between PLC I/O and LCD, accepting serial updates over twisted-pair wiring. Use Value: Cascadable architecture allows one MCU to drive multiple distributed indicators with minimal GPIO usage. |
| Digital Thermometer Display | Remote Counter Readout |
Use Scenario: Battery-powered indoor/outdoor thermometer displays ambient temperature across −40°C to +85°C operating range. IC Role / Device Role / Timing Role: MM5452VX/NOPB receives segmented BCD data from temperature sensor IC and drives 4-digit LCD with integrated backplane oscillator. Use Value: Internal 75 Hz oscillator removes need for external crystal or clock source, reducing BOM count and PCB area. |
Use Scenario: Remote production counter transmits tally data over 10m cable to wall-mounted LCD display in noisy manufacturing setting. IC Role / Device Role / Timing Role: MM5452VX/NOPB serves as serial-to-LCD bridge, receiving data via RS-485-to-TTL converter and driving segments with noise-immune DC-coupled outputs. Use Value: TTL-compatible inputs tolerate voltage drops over long traces; 3V–10V supply range accommodates local 5V or 9V field power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD segment driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MM5453VX/NOPB | Provides 33rd output instead of DATA ENABLE; identical pinout and electrical specs otherwise. | Required when system needs dedicated 33rd segment (e.g., sign bit or decimal point control) rather than enable gating. | Select MM5453VX/NOPB only if the 33rd output functionality is explicitly needed; MM5452VX/NOPB is preferred for enable-controlled architectures. |
| ICM7211AMIW | 4-digit BCD-to-7-segment decoder with built-in oscillator; 28-pin SOIC; no serial interface. | Designed for fixed-format numeric displays without microcontroller involvement; lacks alphanumeric flexibility. | Choose ICM7211AMIW for simple, self-contained 4-digit counters; MM5452VX/NOPB suits programmable, serial-driven, or bar-graph applications. |
Compared with MM5453VX/NOPB, MM5452VX/NOPB trades one output for enable control-critical for synchronized multi-driver systems. Against ICM7211AMIW, it offers full 32-bit segment control and serial scalability at the cost of external data formatting.
Availability
MM5452VX/NOPB is available at Aetrix Electronics and suitable for digital voltmeter readouts, industrial panel indicators, and remote counter readouts requiring stable component supply across extended temperature ranges and legacy design continuity.
Supply support for MM5452VX/NOPB 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 company founded in 1930, specializing in analog, embedded processing, and logic ICs with broad industrial and instrumentation heritage.
The MM5452VX/NOPB belongs to TI's legacy LCD driver product line, designed specifically for low-power, serial-interface-driven segment displays in test equipment, process controls, and portable measurement instruments.
FAQ
What is the primary function of the MM5452VX/NOPB in an LCD system?
The MM5452VX/NOPB functions as a serial-input LCD segment driver IC that accepts 32-bit display data and generates corresponding segment and backplane waveforms to drive up to 32 segments of a passive-matrix LCD. It handles timing, latching, and AC drive generation internally, eliminating the need for external decode logic or multiplex controllers in applications like digital voltmeters and industrial indicators. The MM5452VX/NOPB integrates all necessary functions for direct, low-pin-count interface between microcontrollers and segmented LCDs.
Does the MM5452VX/NOPB require an external crystal or oscillator?
No, the MM5452VX/NOPB does not require an external crystal. It features an internal RC oscillator circuit with ROSC_IN and COSC_IN pins to generate the required backplane frequency (typically 75 Hz with 50 kΩ and 0.01 µF). An external 50% duty-cycle clock may also be used for synchronization purposes, but the internal oscillator suffices for standalone operation. This eliminates BOM cost and board space associated with crystals, making the MM5452VX/NOPB ideal for cost-sensitive and space-constrained designs.
How many segments can the MM5452VX/NOPB drive, and what is its output configuration?
The MM5452VX/NOPB drives exactly 32 individual LCD segments via dedicated output pins, plus one dedicated backplane (BP_OUT) output. It does not provide a 33rd segment output - that function is replaced by the DATA ENABLE pin, distinguishing it from the MM5453VX/NOPB. Each segment output delivers ±40 µA sink/source current at 3V supply, sufficient for standard low-power reflective LCD glass. Outputs are static CMOS drivers with offset voltage ≤ ±50 mV, ensuring stable contrast and minimal ghosting.
What package type and pin count does the MM5452VX/NOPB use?
The MM5452VX/NOPB uses a 44-pin Plastic Leaded Chip Carrier (PLCC) package designated FN0044A by Texas Instruments, with 4.57 mm maximum height and gull-wing lead form. Pin 1 is identified by a corner chamfer or optional dot. This surface-mount package supports reflow soldering and provides mechanical robustness for industrial applications. The pinout is fully documented in TI's SNLS367C datasheet Figure 2, with segment outputs mapped from pin 20 through pin 17 (32 pins), plus VDD, VSS, DATA, CLOCK, DATA ENABLE, BP_OUT, and oscillator terminals.
Is the MM5452VX/NOPB still in active production, and what is its temperature rating?
The MM5452VX/NOPB is marked as "Obsolete" in TI's official packaging documentation, but remains available through authorized distributors and Aetrix Electronics for legacy design support and repair. Its specified operating temperature range is −40°C to +85°C, qualified for industrial environments including factory automation panels, portable test equipment, and outdoor instrumentation. While not recommended for new designs requiring long-term supply assurance, the MM5452VX/NOPB continues to meet full electrical specifications per SNLS367C across this range.
MM5452VX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- COPS™
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, Alphanumeric and Bar Graph
- Interface:
- Serial
- Digits or Characters:
- 4.5 Digits
- Current - Supply:
- -
- Voltage - Supply:
- 3V ~ 10V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.58x16.58)
MM5452VX/NOPB FAQ
1.How can I place an order for MM5452VX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for MM5452VX/NOPB 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 MM5452VX/NOPB reliable?
The price and inventory of MM5452VX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5452VX/NOPB is usually 5 days.
3.What payment methods are accepted for MM5452VX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5452VX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM5452VX/NOPB?
MM5452VX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM5452VX/NOPB 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 MM5452VX/NOPB?
For technical support, including MM5452VX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5452VX/NOPB requirements.
6.How does Aetrix verify that MM5452VX/NOPB is sourced from the original manufacturer or authorized distributors?
All MM5452VX/NOPB 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 MM5452VX/NOPB meets industry standards.
7.What is the process for return or replacement of MM5452VX/NOPB?
All MM5452VX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with MM5452VX/NOPB, 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 MM5452VX/NOPB part is unused and in its original packaging.
Return procedure for MM5452VX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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