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Renesas ICM7228CIBI
- Part No.:
- ICM7228CIBI
- Manufacturer:
- Renesas
- Category:
- Display Drivers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ICM7228CIBI.pdf
- Description:
- IC DRVR 7 SEGMNT 8 DIGIT 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,859
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Product details
Overview
ICM7228CIBI from Intersil is an 8-digit, microprocessor-compatible LED display decoder driver for common anode 7-segment displays. It features parallel random-access RAM write capability, hexadecimal and Code B decoding modes, single 5V supply operation, and integrated digit/segment drivers with 200mA digit drive and 25mA segment peak current. It is used in instrumentation and test equipment requiring stable numeric panel displays.
For engineers reviewing the ICM7228CIBI datasheet, ICM7228CIBI pinout, ICM7228CIBI application, or ICM7228CIBI equivalent, key selection considerations include its random-access data entry protocol, three-level HEXA/CODE B/SHUTDOWN control on Pin 9, -40°C to +85°C operating range, and SOIC-28 package compatibility with legacy ICM7218-based designs.
Technical Context
The ICM7228CIBI implements a dedicated 8-byte static RAM with direct digit-addressed write access via DA0–DA2 inputs, eliminating sequential update overhead. Its internal multiplex oscillator runs at ~390Hz per digit with 2–10μs interdigit blanking to prevent ghosting.
Unlike ICM7228A/B variants, it lacks a control register and No Decode mode; display format and shutdown are managed exclusively through the three-level input on Pin 9 (HEXA/CODE B/SHUTDOWN), with defined voltage thresholds: ≥4.2V for Hex, 2.0–3.0V for Code B, and ≤0.8V for shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Digits | 8-digit, 7-segment + decimal point - supports full numeric panel readouts without external multiplexing logic. |
| Data Entry Protocol | Parallel random-access - enables direct write to any digit address (DA0–DA2) without sequential cycling or address counter dependency. |
| Supply Voltage | Single 5.0V ±10% - eliminates need for dual-rail or level-shifting circuitry in standard 5V microcontroller systems. |
| Digit Drive Current | 200mA min per digit (VDD − VDIG = 2.0V) - sufficient to drive high-brightness common anode LED displays without external transistors. |
| Segment Peak Current | 25mA typical per segment (VSEG = 1.0V) - ensures uniform brightness across segments independent of on-count, critical for bar graph fidelity. |
| Operating Temperature | -40°C to +85°C - validated for industrial instrumentation and handheld test equipment deployed in uncontrolled environments. |
| Write Access Time | 200ns minimum WRITE pulse width - compatible with fast microcontrollers (e.g., 8051, PIC, ARM Cortex-M0+) without wait states. |
Pinout & Package
ICM7228CIBI is housed in a 28-lead SOIC package (M28.3 drawing), surface-mount compatible with standard reflow profiles and RoHS-compliant Pb-free plus anneal finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4 (SEG c, SEG e, SEG b, DP) |
Segment/digit output | Drive LED segments c, e, b and decimal point - outputs sink current for common anode configuration. |
| 5–6, 10 (DA0, DA1, DA2) |
Digit address input | 3-bit binary address selects one of eight RAM locations for parallel write - enables true random-access digit update. |
| 7, 11–14 (ID7, ID1–ID3) |
Data input | ID7 = decimal point (active-low); ID0–ID3 = 4-bit display code - no ID4–ID6 used; all data written on WRITE rising edge. |
| 8 (WRITE) |
Control input | Rising-edge-triggered write strobe - latches digit address and data simultaneously; timing-critical (min 200ns pulse width). |
| 9 (HEXA/CODE B/SHUTDOWN) |
Three-level control input | Voltage-selectable function: ≥4.2V → Hex decode; 2.0–3.0V → Code B decode; ≤0.8V → shutdown (2.5μA IQ). |
| 15–18, 20–23 (DIGIT 1–8) |
Digit output | Eight open-drain N-channel digit drivers - each sources up to 200mA to common-anode LED anodes. |
| 24–27 (SEG f, SEG d, SEG g, SEG a) |
Segment output | Four segment drive lines grouped to cover all 7 segments + DP - routed to minimize trace length in PCB layout. |
| 19, 28 (VDD, VSS) |
Power supply | Single 5V rail; VSS is system ground reference - decoupling capacitor (0.1μF) required within 10mm of VDD/VSS pins. |
Key Features
| Feature | Design Value |
|---|---|
| Parallel random-access RAM write | Direct digit addressing via DA0–DA2 eliminates software overhead of sequential updates - reduces CPU cycles by >80% vs. ICM7228A/B. |
| Three-level functional input (Pin 9) | Single pin controls decode mode (Hex/Code B) and shutdown - saves GPIO resources and simplifies firmware state management. |
| Integrated digit/segment drivers | No external transistors or current-limiting resistors needed - reduces BOM count and board area in space-constrained instruments. |
| Interdigit blanking (2–10μs) | Eliminates ghosting between multiplexed digits - ensures clean, high-contrast numeric display even at temperature extremes. |
| 200mA digit drive capability | Supports high-brightness LED displays up to 0.5" height - suitable for front-panel applications where visibility under ambient light is critical. |
Applications
| Instrumentation Panel Display | Handheld Test Equipment |
|---|---|
|
Use Scenario: Digital multimeter or oscilloscope front panel showing measured voltage, frequency, or duty cycle. IC Role / Device Role / Timing Role: Primary 8-digit LED display controller interfacing directly to MCU via memory-mapped I/O; handles multiplexing, decoding, and segment driving. Use Value: Random-access write allows instantaneous digit correction during measurement updates; 200mA drive ensures readability in bright lab environments. |
Use Scenario: Portable LCR meter or signal generator with numeric parameter readout and status indicators. IC Role / Device Role / Timing Role: Standalone display interface managing 8-digit numeric output and decimal point control without FPGA or additional logic. Use Value: Three-level Pin 9 simplifies power-aware UI design - floating for Code B during normal operation, pulled low for shutdown during battery-saving sleep mode. |
| Bargraph Display Interface | Industrial Control Panel |
|
Use Scenario: Analog-style level indicator using segmented LEDs to represent signal amplitude or process variable. IC Role / Device Role / Timing Role: Segment-level control via fixed-code patterns (e.g., 0x01–0xFF) to activate discrete LED bars in sequence. Use Value: Uniform 25mA segment current ensures consistent brightness across all 64 segments - avoids visual distortion when multiple bars are lit. |
Use Scenario: Factory-floor PLC HMI displaying setpoints, alarms, or runtime counters in harsh thermal conditions. IC Role / Device Role / Timing Role: Ruggedized numeric display driver rated for -40°C to +85°C operation with no derating required. Use Value: SOIC-28 package and Pb-free plus anneal finish support long-term reliability in vibration-prone, high-humidity industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED display driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICM7228CIBIZ | Pb-free SOIC-28 variant with identical electrical specs and pinout; RoHS-compliant matte tin termination. | Required for new designs targeting RoHS compliance; drop-in replacement for ICM7228CIBI in reflow assembly. | Select ICM7228CIBIZ for production builds requiring documented Pb-free sourcing and JEDEC MSL-3 reflow compatibility. |
| MAX7219CNG+ | Serial SPI interface (vs. parallel), 8-digit, common-cathode only, integrated current regulation, no Code B mode. | Suited for microcontrollers with limited GPIO but abundant SPI; requires external current-setting resistor and level translation for 5V systems. | Choose MAX7219CNG+ only if serial interface reduces MCU pin count more than parallel address/data savings justify. |
Compared with ICM7228CIBI, ICM7228CIBIZ offers identical functionality with enhanced environmental compliance, while MAX7219CNG+ trades parallel simplicity for serial flexibility and different drive architecture - neither provides No Decode mode or common-anode support like the ICM7228 family.
Availability
ICM7228CIBI is available at Aetrix Electronics and suitable for instrumentation, handheld test equipment, and industrial control panels requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for ICM7228CIBI 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
Intersil (now part of Renesas Electronics) is a semiconductor manufacturer specializing in precision analog, power management, and interface ICs for industrial and embedded systems.
The ICM7228 product line was designed specifically for microprocessor-driven LED display applications requiring integrated decoding, RAM, and high-current drivers - targeting cost-sensitive, reliability-critical instrumentation markets.
FAQ
What display types does the ICM7228CIBI support?
The ICM7228CIBI supports only common anode 7-segment LED displays with decimal point. It does not support common cathode configurations (handled by ICM7228B variants) or alphanumeric or dot-matrix displays. Its segment and digit drivers are optimized for direct connection to standard 0.3"–0.5" common anode LED modules without external current-limiting components.
How does the ICM7228CIBI handle display data entry compared to ICM7228A/B?
The ICM7228CIBI uses parallel random-access data entry via DA0–DA2 address lines and ID0–ID3 + ID7 data lines, unlike the sequential or single-digit update modes of ICM7228A/B. This eliminates the need for internal address counters or control register writes - each WRITE pulse directly updates the digit selected by the address bus, simplifying firmware and reducing bus transaction count.
What is the function of Pin 9 (HEXA/CODE B/SHUTDOWN) on the ICM7228CIBI?
Pin 9 on the ICM7228CIBI is a three-level input that determines display behavior: ≥4.2V selects Hexadecimal decoding, 2.0–3.0V selects Code B decoding, and ≤0.8V activates shutdown mode (reducing supply current to 2.5μA). This single-pin configurability replaces separate control bits used in ICM7228A/B, streamlining hardware design and reducing GPIO usage.
Does the ICM7228CIBI support No Decode mode for individual segment control?
No, the ICM7228CIBI does not support No Decode mode. Unlike ICM7228A/B variants, it omits this feature entirely - it only supports Hexadecimal and Code B character sets. Segment-level control is not possible; display data must be formatted as 4-bit codes corresponding to valid characters in Table 5 of the datasheet.
What is the maximum digit scan rate and interdigit blanking time for the ICM7228CIBI?
ICM7228CIBI operates at a fixed digit scan rate of approximately 390Hz per digit, with each digit active for ~320μs. Interdigit blanking is guaranteed between 2μs and 10μs, ensuring complete settling of segment data before the next digit is enabled - this prevents ghosting and maintains display clarity across the full -40°C to +85°C operating range.
ICM7228CIBI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Display Type:
- LED
- Configuration:
- 7 Segment
- Interface:
- -
- Digits or Characters:
- 8 Digits
- Current - Supply:
- 200 µA
- Voltage - Supply:
- 4V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
ICM7228CIBI FAQ
1.How can I place an order for ICM7228CIBI through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7228CIBI 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 ICM7228CIBI reliable?
The price and inventory of ICM7228CIBI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7228CIBI is usually 5 days.
3.What payment methods are accepted for ICM7228CIBI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7228CIBI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7228CIBI?
ICM7228CIBI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7228CIBI 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 ICM7228CIBI?
For technical support, including ICM7228CIBI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7228CIBI requirements.
6.How does Aetrix verify that ICM7228CIBI is sourced from the original manufacturer or authorized distributors?
All ICM7228CIBI 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 ICM7228CIBI meets industry standards.
7.What is the process for return or replacement of ICM7228CIBI?
All ICM7228CIBI units undergo pre-shipment inspection (PSI). If there is an issue with ICM7228CIBI, 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 ICM7228CIBI part is unused and in its original packaging.
Return procedure for ICM7228CIBI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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