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Texas Instruments MM145453V/NOPB
- Part No.:
- MM145453V/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Display Drivers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
MM145453V/NOPB.pdf
- Description:
- IC DRVR 7 SEG 4 1/2 DIGIT 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,606
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Product details
Overview
MM145453V/NOPB from Texas Instruments is a CMOS monolithic LCD segment driver IC capable of directly driving up to 33 segments in non-multiplexed mode, operating from 3V to 10V supply, with TTL-compatible serial data input and internal oscillator-based backplane generation. It is used in 4½-digit 7-segment displays for digital voltmeters, thermometers, and industrial control indicators.
For engineers reviewing the MM145453V/NOPB datasheet, MM145453V/NOPB pinout, MM145453V/NOPB application, or MM145453V/NOPB equivalent, key selection criteria include segment count (33), serial interface timing (500–1000 kHz clock), backplane frequency (75 Hz typical), and PLCC-44 package compatibility with MC145453.
Technical Context
The MM145453V/NOPB implements a static master-slave shift register architecture with latch storage, accepting 34-bit serial frames (1 start bit + 33 segment bits + 2 don't-care bits) and generating internal LOAD/RESET signals on the 36th clock edge. It supports both internal oscillator (via ROSC_IN/COSC_IN) and external BP_IN clocking at 50% duty cycle.
Its segment outputs provide ±40 µA sink/source capability at VDD = 3V, while backplane output delivers ±500 µA at same condition. Offset voltage is controlled to ±50 mV for both segment and backplane outputs under specified capacitive loads (250 pF and 8750 pF respectively).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Segment Count | 33 independent segment outputs - enables full 4½-digit 7-segment + decimal point + sign display without multiplexing. |
| Supply Voltage Range | 3V to 10V - supports battery-powered (3V) and industrial rail (5V/10V) operation without level-shifting. |
| Serial Clock Frequency | 500 kHz (min at 3V) to 1 MHz (max at 10V) - defines maximum update rate and interface timing margin. |
| Backplane Output Frequency | 75 Hz typical (fOSC/16) - matches standard LCD AC drive requirements to prevent electrolysis and image retention. |
| Average Supply Current | 10 µA at 5V, all outputs open - ultra-low quiescent power ideal for portable instrumentation. |
| Input Logic Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V (at VDD = 5V) - ensures robust TTL-level compatibility with microcontrollers and logic families. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including panel-mounted meters and remote displays. |
Pinout & Package
MM145453V/NOPB is housed in a 44-pin plastic leaded chip carrier (PLCC) package per drawing FN0044A, with 1.27 mm pitch, 16.2 mm × 16.2 mm body, and maximum height of 4.57 mm. Pin 1 is marked by corner notch or optional ID indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive Power Supply | Primary supply input (3V–10V); powers all internal logic and output drivers. |
| VSS | Ground Reference | Logic and analog ground return; must be low-impedance for stable LCD bias. |
| DATA | Serial Data Input | CMOS/TTL-compatible input accepting 34-bit frame (start bit + 33 segment bits + 2 don't-care). |
| CLOCK | Serial Clock Input | Edge-triggered input synchronizing data shift; rising edge clocks data, falling edge of 36th cycle triggers load/reset. |
| BP_OUT | Backplane Output | Push-pull output delivering square-wave AC drive to LCD common electrode at fOSC/16 (e.g., 75 Hz). |
| BP_IN | External Backplane Clock Input | Accepts 50% duty-cycle external clock to synchronize display drive with AC line or system timing. |
| OSC_IN | Oscillator Timing Input | Connects to ROSC_IN (to VDD) and COSC_IN (to GND) to set internal oscillator frequency (e.g., 50 kΩ + 0.01 µF → ~1200 Hz). |
| SEG1–SEG33 | Segment Outputs | 33 dedicated CMOS outputs driving individual LCD segment electrodes; each sinks or sources up to ±40 µA at 3V. |
Key Features
| Feature | Design Value |
|---|---|
| 33-Segment Direct Drive | Eliminates external multiplexing circuitry and reduces BOM count for 4½-digit numeric displays. |
| Serial Interface with Embedded Load Control | 34-bit frame + automatic LOAD/RESET on 36th clock edge removes need for separate strobe or latch signal. |
| Configurable Backplane Source | Supports either internal oscillator (ROSC_IN/COSC_IN) or external 50% duty-cycle clock via BP_IN for EMI reduction. |
| TTL-Compatible Inputs | Accepts standard microcontroller GPIO outputs without level translation across full 3V–10V VDD range. |
| Pin Compatibility with MC145453 | Enables drop-in replacement in legacy designs using Motorola/Freescale MC145453-based PCBs. |
Applications
| Digital Voltmeter (DVM) | Industrial Panel Meter |
|---|---|
|
Use Scenario: Portable handheld DVM displaying 4½-digit DC voltage readings with auto-ranging and hold function. IC Role / Device Role / Timing Role: Segment driver receiving serial digit data from MCU; generates synchronized backplane waveform to prevent LCD degradation. Use Value: Enables direct drive of all 33 segments (including polarity, decimal points, and overrange indicators) with single IC and no external bias components. |
Use Scenario: DIN-rail mounted temperature/pressure transmitter with local 4½-digit LCD readout and 4–20 mA loop output. IC Role / Device Role / Timing Role: Primary display controller interfacing to industrial MCU; operates reliably across −40°C to +85°C ambient. Use Value: Delivers stable segment drive current (±40 µA) and low-offset backplane (±50 mV) to ensure consistent contrast and long-term LCD reliability. |
| Digital Thermometer | Remote Display Module |
|
Use Scenario: Battery-powered indoor/outdoor thermometer with dual-display capability and low-power sleep mode. IC Role / Device Role / Timing Role: Low-quiescent-current (10 µA at 5V) LCD driver activated only during display updates to extend battery life. Use Value: Ultra-low IDD allows >1-year operation on coin cell; serial interface minimizes MCU GPIO usage and PCB routing. |
Use Scenario: Wireless sensor node transmitting environmental data to central gateway, with local LCD status display. IC Role / Device Role / Timing Role: Standalone display interface handling serial data from RF SoC; tolerant of intermittent power and voltage fluctuations. Use Value: Wide 3V–10V supply range accommodates varying battery states (e.g., 3.3V Li-ion down to 2.8V cutoff); no external regulators required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LCD segment driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC145453P | Identical pinout and functional specification; identical 33-segment drive, serial protocol, and oscillator architecture; manufactured by ON Semiconductor (legacy Motorola). | Same use cases (DVM, panel meter, thermometer); requires verification of RoHS compliance and MSL rating for new production. | Select when sourcing legacy-design continuity or dual-sourcing from alternate manufacturer. |
| MM5453N | Predecessor in same family; differs in pinout (28-pin DIP), lower segment count (32), no BP_IN pin, and no cascading capability. | Limited to simpler 3½-digit displays; not suitable for 4½-digit or cascaded multi-chip configurations. | Choose only for space-constrained through-hole designs where 32 segments suffice and PLCC footprint is unacceptable. |
Compared with MC145453P, MM145453V/NOPB offers guaranteed RoHS-compliant green packaging and TI's active support lifecycle; versus MM5453N, it adds one segment, BP_IN flexibility, and PLCC-44 for higher-density SMT layouts.
Availability
MM145453V/NOPB is available at Aetrix Electronics and suitable for digital voltmeters, industrial panel meters, and portable thermometers requiring stable component supply, long-term manufacturability, and RoHS-compliant PLCC packaging.
Supply support for MM145453V/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 high-reliability ICs for industrial, automotive, and consumer markets.
The MM145453V/NOPB belongs to TI's legacy LCD driver product line, designed specifically for low-power, serial-interface-driven numeric and alphanumeric LCD modules in instrumentation and control applications.
FAQ
What is the maximum number of LCD segments the MM145453V/NOPB can drive?
The MM145453V/NOPB drives up to 33 LCD segments directly in non-multiplexed mode. This supports full 4½-digit 7-segment displays including decimal points, sign indicators, and overflow flags. Each segment output is individually controllable via the 33-bit serial data frame, and no external segment decoding or multiplexing circuitry is required when using the MM145453V/NOPB.
Does the MM145453V/NOPB require an external crystal or resonator?
No, the MM145453V/NOPB does not require an external crystal or resonator. It features an internal RC oscillator controlled by an external resistor (ROSC_IN) and capacitor (COSC_IN) connected to the OSC_IN pin. Typical configuration uses 50 kΩ and 0.01 µF to generate ~1200 Hz, divided by 16 to yield ~75 Hz at BP_OUT - sufficient for standard LCD AC drive. An external clock may be applied via BP_IN if synchronization is needed.
Is the MM145453V/NOPB pin-compatible with the MC145453?
Yes, the MM145453V/NOPB is explicitly stated as pin-compatible and functionally compatible with the MC145453 in its official datasheet. Both devices share identical 44-pin PLCC footprints, signal assignments, electrical characteristics, and serial protocol timing. This allows direct substitution in existing MC145453-based PCBs without layout changes, provided thermal and RoHS requirements are verified.
What is the recommended operating voltage range for the MM145453V/NOPB?
The MM145453V/NOPB is rated for recommended operation from 3V to 10V on VDD. At 3V, it supports minimum clock frequency of 500 kHz; at 10V, maximum clock frequency reaches 1 MHz. The device draws only 10 µA average supply current at 5V, making it suitable for battery-powered instruments. Absolute maximum rating is 10V - exceeding this risks permanent damage.
Can multiple MM145453V/NOPB ICs be cascaded to drive more than 33 segments?
Yes, the MM145453V/NOPB supports cascaded operation as confirmed in its datasheet features. Cascading is achieved by connecting the serial DATA output of one device (not explicitly labeled but implied via daisy-chain capability) to the DATA input of the next, using shared CLOCK and BP_OUT/IN signals. This allows expansion beyond 33 segments - for example, two units drive 66 segments for dual 4½-digit displays or bar-graph implementations.
MM145453V/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 44-LCC (J-Lead)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Display Type:
- LCD
- Configuration:
- 7 Segment + DP, Alphanumeric and Bar Graph
- Interface:
- Serial
- Digits or Characters:
- 4.5 Digits
- Current - Supply:
- 40 µA
- Voltage - Supply:
- 3V ~ 10V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-PLCC (16.58x16.58)
MM145453V/NOPB FAQ
1.How can I place an order for MM145453V/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for MM145453V/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 MM145453V/NOPB reliable?
The price and inventory of MM145453V/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM145453V/NOPB is usually 5 days.
3.What payment methods are accepted for MM145453V/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM145453V/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM145453V/NOPB?
MM145453V/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM145453V/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 MM145453V/NOPB?
For technical support, including MM145453V/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM145453V/NOPB requirements.
6.How does Aetrix verify that MM145453V/NOPB is sourced from the original manufacturer or authorized distributors?
All MM145453V/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 MM145453V/NOPB meets industry standards.
7.What is the process for return or replacement of MM145453V/NOPB?
All MM145453V/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with MM145453V/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 MM145453V/NOPB part is unused and in its original packaging.
Return procedure for MM145453V/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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