My Inquiry
My Account
Renesas ICM7228BIBI
- Part No.:
- ICM7228BIBI
- Manufacturer:
- Renesas
- Category:
- Display Drivers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ICM7228BIBI.pdf
- Description:
- IC DRVR 7 SEGMNT 8 DIGIT 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,581
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ICM7228BIBI from Intersil is a microprocessor-compatible 8-digit, 7-segment LED display decoder driver for common cathode displays, featuring 8-byte static RAM, on-chip digit/segment drivers, hexadecimal and Code B decoding, and No Decode mode for full segment-level control. It operates from a single 5V supply, supports -40°C to +85°C, and delivers 50mA digit drive and 12mA peak segment current.
For engineers reviewing the ICM7228BIBI datasheet, ICM7228BIBI pinout, ICM7228BIBI application, or ICM7228BIBI equivalent, key selection criteria include common cathode compatibility, sequential 8-digit or single-digit RAM update modes, interdigit blanking to prevent ghosting, and low-power shutdown consuming ≤1µA.
Technical Context
The ICM7228BIBI integrates an 8-byte static RAM, multiplex oscillator, decode/No Decode logic, and dual-driver architecture optimized for common cathode LED panels. Its control register (accessed via MODE=HIGH) configures decoding scheme (ID6), Decode/No Decode (ID5), shutdown (ID4), and data flow (ID7).
Data entry uses either sequential 8-digit update (ID7=HIGH) or single-digit addressing (ID0–ID2 with ID7=LOW), enabling flexible microprocessor interfacing without wait states. The device implements non-overlapping digit drive with 320µs per digit and 390Hz scan rate, plus interdigit blanking to eliminate ghosting in multiplexed displays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Display Format | Hexadecimal, Code B, or No Decode - enables numeric, alphanumeric, or custom segment-level control (e.g., bargraphs) |
| Digit Drive Current | 50mA min @ VDIG = VSS + 1.0V - sufficient for standard bubble-lensed monolithic 7-segment displays |
| Segment Drive Current | 12mA peak @ VDD − VSEG = 2.0V - supports individual LED segments up to 0.3" height without external current limiting |
| Write Access Time | 200ns min pulse width - allows direct memory-mapped I/O interfacing with most 8-bit microcontrollers at full speed |
| Supply Voltage | 4V to 6V - compatible with standard 5V ±10% logic rails; retains RAM data down to 2V supply |
| Operating Temp | -40°C to +85°C - qualified for industrial instrumentation and handheld test equipment environments |
| Shutdown Current | 1µA max - enables ultra-low-power standby while preserving display RAM contents |
Pinout & Package
ICM7228BIBI is housed in a 28-lead SOIC package (M28.3), RoHS-compliant, with gull-wing leads and 0.025" pitch. Thermal resistance θJA = 75°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 20, 21, 22, 23 | DIGIT 4 / DIGIT 6 / DIGIT 3 / DIGIT 1 / DIGIT 8 / DIGIT 2 / DIGIT 5 / DIGIT 7 | Common-cathode digit sink outputs - drive corresponding LED digit cathodes; non-overlapping timing prevents crosstalk |
| 15, 16, 17, 18, 24, 25, 26, 27 | DP / SEG a / SEG b / SEG d / SEG c / SEG e / SEG f / SEG g | Common-anode segment source outputs - drive segment anodes; each maps directly to one of 8 segments + decimal point |
| 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 | ID6–ID7, WRITE, MODE, ID4–ID3, ID0–ID2 | Parallel 8-bit data/control bus - supports microprocessor interface with MODE-selectable RAM vs. control register access |
| 19, 28 | VDD / VSS | Single 5V power rail and ground - no auxiliary supplies required; internal CMOS logic and drivers share same rail |
Key Features
| Feature | Design Value |
|---|---|
| No Decode Mode | Direct 8-bit per-digit control of all 64 segments (including DP), enabling bargraphs, status indicators, and irregular display layouts |
| Interdigit Blanking | 2–10µs blanking interval ensures stable segment data before digit activation - eliminates visual ghosting in multiplexed displays |
| Single-Digit Update | Addressable RAM access via ID0–ID2 (digits 1–8) allows partial display refresh without disturbing other digits - reduces CPU overhead |
| RAM Banking | Two independent 8-byte banks (selected by ID3) support alternating display sets - useful for dual-mode readouts (e.g., voltage/current) |
| Three-Level Control Input | ID4–ID7 and MODE enable full configuration (decode mode, shutdown, data flow) using only standard TTL/CMOS logic levels |
Applications
| Instrumentation Readouts | Handheld Test Equipment |
|---|---|
|
Use Scenario: Digital multimeter or oscilloscope front-panel display showing measured voltage, current, or frequency. IC Role / Device Role / Timing Role: Primary LED display controller managing 8-digit multiplexed output with real-time updates and decimal point positioning. Use Value: Eliminates need for external segment/digit drivers and timing logic; No Decode mode supports custom symbols (e.g., AC/DC icons) alongside numeric data. |
Use Scenario: Portable LCR meter or signal generator with battery-powered operation and compact panel layout. IC Role / Device Role / Timing Role: Low-power display interface handling intermittent updates and deep-sleep shutdown between measurements. Use Value: 1µA shutdown current extends battery life; common cathode drive matches low-cost monolithic LED modules used in handheld enclosures. |
| Bargraph Displays | Industrial Panel Meters |
|
Use Scenario: Analog-style level indicator using discrete LEDs arranged vertically/horizontally to show signal strength or threshold status. IC Role / Device Role / Timing Role: Segment-level controller mapping input data to individual LED segments without decoding constraints. Use Value: No Decode mode provides deterministic bit-to-segment mapping (per Table 6); uniform segment brightness regardless of active count due to high segment output impedance. |
Use Scenario: DIN-rail mounted temperature or pressure monitor operating continuously in factory environments. IC Role / Device Role / Timing Role: Rugged display driver supporting extended temperature range (-40°C to +85°C) and immune to LCD degradation at extremes. Use Value: Stable 390Hz multiplex rate and interdigit blanking ensure flicker-free visibility under industrial lighting; SOIC package withstands vibration and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED display driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICM7228BIBIZ | Pb-free SOIC variant with identical pinout, electrical specs, and functionality; replaces ICM7228BIBI per Intersil's ordering notice. | No functional change; intended for RoHS-compliant manufacturing with wave solder compatibility. | Select ICM7228BIBIZ for new designs requiring lead-free compliance and long-term supply continuity. |
| ICM7218B | Lacks single-digit update mode and RAM banking; shares No Decode, Hex/Code B, and common cathode drive but has slower write timing (no 200ns spec). | Software incompatible due to missing ID7-based data flow control; requires full 8-digit reload for any change. | Choose ICM7228BIBI when partial display updates or dual-bank data storage are required; ICM7218B suits simpler fixed-format displays. |
Compared with ICM7228BIBIZ, the ICM7228BIBI offers identical performance but lacks Pb-free finish; compared with ICM7218B, it adds single-digit addressing and RAM banking-critical for dynamic, multi-parameter readouts in embedded instrumentation.
Availability
ICM7228BIBI is available at Aetrix Electronics and suitable for instrumentation readouts, handheld test equipment, and industrial panel meters requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ICM7228BIBI 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, test, and embedded systems.
The ICM7228 product line was designed specifically for microprocessor-driven LED display systems requiring integrated RAM, flexible decoding, and robust multiplexed drive - targeting instrumentation and portable measurement equipment.
FAQ
What display type does the ICM7228BIBI support?
The ICM7228BIBI supports common cathode 7-segment LED displays exclusively. Its digit drivers sink current (N-channel), while segment drivers source current (P-channel), matching the polarity requirements of common cathode configurations. It cannot drive common anode displays - those require ICM7228A or ICM7228C variants.
How does the No Decode mode work in the ICM7228BIBI?
In No Decode mode, the ICM7228BIBI bypasses internal character mapping and routes ID0–ID7 bits directly to segment outputs: ID0→a, ID1→b, ID2→c, ID3→d, ID4→e, ID5→f, ID6→g, and ID7→DP (active-low). This enables full control over all 64 segments across 8 digits for bargraphs, icons, or non-standard layouts - confirmed in Table 6 of the FN3160 datasheet.
What is the maximum digit drive capability of the ICM7228BIBI?
The ICM7228BIBI provides a minimum digit drive current of 50mA per digit when VDIG = VSS + 1.0V, as specified in the Electrical Specifications table on page 5 of FN3160 Rev 9.00. This is sufficient for driving bubble-lensed monolithic 7-segment displays and individual LEDs up to 0.3" height where high brightness is not critical.
Can the ICM7228BIBI retain display data during power-down?
Yes - the ICM7228BIBI retains its 8-byte display RAM contents even when supply voltage drops to 2V, and enters ultra-low-power shutdown (≤1µA) when ID4 is asserted. Data remains intact during brown-out conditions and resumes display immediately upon exit from shutdown, making it suitable for battery-backed instrumentation.
Is the ICM7228BIBI pin-compatible with the ICM7218B?
No - although both are common cathode LED drivers from Intersil, the ICM7228BIBI and ICM7218B have different pin assignments, control protocols, and feature sets. The ICM7228BIBI introduces ID7 (DATA COMING) and expanded control register functionality, making direct PCB replacement impossible without layout and firmware changes.
ICM7228BIBI 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:
- 250 µA
- Voltage - Supply:
- 4V ~ 6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
ICM7228BIBI FAQ
1.How can I place an order for ICM7228BIBI through Aetrix?
Please submit a Request for Quotation (RFQ) for ICM7228BIBI 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 ICM7228BIBI reliable?
The price and inventory of ICM7228BIBI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICM7228BIBI is usually 5 days.
3.What payment methods are accepted for ICM7228BIBI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICM7228BIBI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICM7228BIBI?
ICM7228BIBI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICM7228BIBI 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 ICM7228BIBI?
For technical support, including ICM7228BIBI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICM7228BIBI requirements.
6.How does Aetrix verify that ICM7228BIBI is sourced from the original manufacturer or authorized distributors?
All ICM7228BIBI 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 ICM7228BIBI meets industry standards.
7.What is the process for return or replacement of ICM7228BIBI?
All ICM7228BIBI units undergo pre-shipment inspection (PSI). If there is an issue with ICM7228BIBI, 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 ICM7228BIBI part is unused and in its original packaging.
Return procedure for ICM7228BIBI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICM7228BIBI Tags
-
PCA8561AHN/AY
NXP Semiconductors
-
SN74LS47N
Texas Instruments
-
PCF85176T/1Y
NXP Semiconductors
-
PCF85176H/1,518
NXP Semiconductors
-
BU9796AMUV-E2
Rohm Semiconductor
-
PCA85176H/Q900/1,5
NXP Semiconductors
-
PCF8537AH/1,518
NXP Semiconductors
-
LM3914VX/NOPB
Texas Instruments
-
PCF85134HL/1,118
NXP Semiconductors
-
AS1115-BSST
ams-OSRAM USA INC.
-
PCA8534AH/Q900/1,5
NXP Semiconductors
-
LM3914V/NOPB
Texas Instruments
Tech Hub
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…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
