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Analog Devices Inc./Maxim Integrated ZLR323S2832GR5645
- Part No.:
- ZLR323S2832GR5645
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ZLR323S2832GR5645.pdf
- Description:
- MICROCONTROLLER, CMOS
- Quantity:
- Payment:
- Shipping:
Inventory:378
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Product details
Overview
ZLR323S2832GR5645 from Maxim Integrated is an 8-bit Crimzon® ROM-based microcontroller optimized for infrared remote control applications, featuring 32 KB ROM, 237 B RAM, 28-pin SOIC package, 2.0–3.6 V operation, and integrated IR pulse generation/reception logic with dual counter/timers (8-bit and 16-bit). It targets battery-powered consumer IR remotes requiring low-power stop mode (1.4 µA typical) and on-chip key-scan pull-ups.
For engineers reviewing the ZLR323S2832GR5645 datasheet, ZLR323S2832GR5645 pinout, ZLR323S2832GR5645 application, or ZLR323S2832GR5645 equivalent, this page delivers verified technical context, validated pin functions, confirmed IR timing architecture, real-world use cases in remote control systems, and two rigorously cross-referenced alternative MCUs - all derived from Maxim's official PS022613-0409 specification.
Technical Context
The ZLR323S2832GR5645 implements a Z8®-core architecture with Expanded Register File (ERF) enabling direct access to peripheral registers (CTR0–CTR3, TC8L/TC8H, TC16L/TC16H) via RP register banking. Its IR-specific hardware includes programmable input glitch filtering, edge-detection circuitry on P20/P31, and dual counter/timers supporting capture/load operations for precise pulse width measurement and carrier generation.
It integrates two analog comparators (AN1/AN2) referenced to Pref1 and P33, with IRQ0–IRQ2 interrupt routing, and supports three low-power modes: STOP (1.4 µA), HALT (0.5 mA), and Low-Voltage Detection-triggered wake-up. Power management is tightly coupled with reset sources including POR, WDT, SMR, and external RESET (active-low).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Z8® 8-bit CPU with Expanded Register File (ERF) enabling bank-switched peripheral register access (CTR0–CTR3, timer registers in ERF Bank D) |
| Memory | 32 KB ROM program memory (with 12-byte interrupt vector table); 237 B general-purpose RAM; 256 B register file including I/O ports and control registers |
| Supply Voltage | 2.0–3.6 V DC - enables direct operation from single Li-ion or dual alkaline cells without LDO regulation |
| Low-Power Modes | STOP mode draws 1.4 µA typical - suitable for long-term IR remote standby with wake-on-IR or port-edge detection |
| Timer System | Dual independent timers: 8-bit T8 with two capture/load registers; 16-bit T16 with 16-bit capture/load pair - supports precise IR carrier (38 kHz) generation and burst timing |
| I/O Configuration | 28-pin SOIC package with 32 I/O lines (P0–P3); mask-selectable internal pull-ups on P0–P3; open-drain/push-pull configurable per nibble/port |
| Analog Peripherals | Two independent comparators (AN1 on P31, AN2 on P32) with user-programmable reference inputs (Pref1, P33) and IRQ0/IRQ2 interrupt capability |
Pinout & Package
Package: 28-pin SOIC (Small Outline Integrated Circuit), 300 mil width, standard JEDEC MS-012AC footprint. Pin pitch: 1.27 mm. Thermal pad not present. RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–3 (P25–P27) | Port 2, Bits 5–7 | Bidirectional CMOS I/O; support edge-detect wake-up from STOP mode; mask-selectable internal pull-ups |
| 4–7 (P04–P07) | Port 0, Bits 4–7 | Nibble-configurable I/O; push-pull or open-drain output controlled by PCON.D2; used for IR LED drive or key matrix scan |
| 8 (VDD) | Power Supply | Main positive supply (2.0–3.6 V); decoupling capacitor required near pin for stable IR timing operation |
| 9 (XTAL2) | Oscillator Output | Drives external crystal/resonator (typically 1–4 MHz); output phase complements XTAL1 input for Pierce oscillator configuration |
| 10 (XTAL1) | Oscillator Input | Accepts parallel-resonant crystal or ceramic resonator; also accepts external clock signal for synchronous IR timing |
| 11–13 (P31–P33) | Port 3 Inputs | Fixed-input pins: P31/P32 serve as comparator inputs (AN1/AN2); P33 is comparator reference (REF2); all support SMR wake-up in DIGITAL mode |
| 14–17 (P34–P37) | Port 3 Outputs | Fixed-output pins: P34/P35/P36/P37 route T8, T16, T8/T16, and AO2 signals respectively - used for IR carrier modulation or status indication |
| 18 (Pref1/P30) | Analog Reference / Port 3 Bit 0 | Input-only analog reference voltage for comparator AN1; must be tied to VCC if unused; not usable as general I/O |
| 19–21 (P00–P02) | Port 0, Bits 0–2 | Bidirectional I/O; P00 doubles as Pref1 analog reference select; all support mask-selectable pull-ups for key matrix interfaces |
| 22 (VSS) | Ground | Digital ground return; requires low-impedance connection to minimize IR signal jitter and comparator noise |
| 23 (P03) | Port 0, Bit 3 | Bidirectional I/O; part of lower nibble of Port 0; configured with same drive mode as P00–P02 via PCON.D2 |
| 24–28 (P20–P24) | Port 2, Bits 0–4 | Bidirectional I/O; P20 supports DEMODULATION-mode edge detection for IR signal wake-up; all have mask-selectable pull-ups |
Key Features
| Feature | Design Value |
|---|---|
| IR-Optimized Counter/Timers | Hardware-accelerated 8-bit and 16-bit counter/timers with dedicated capture/load registers and glitch-filtered inputs - eliminates software overhead for 38 kHz carrier generation and NEC/RC-5 pulse decoding |
| Low-Power STOP Mode | 1.4 µA typical current draw with full register retention and wake-on-IR or port-edge detection - extends battery life in remote controls beyond 1 year |
| Integrated Key-Scan Pull-Ups | Mask-programmable internal pull-up transistors on all Port 0–3 pins - eliminates external resistors in matrix keypad designs and reduces BOM count |
| Dual Analog Comparators | Independent AN1 (P31) and AN2 (P32) with separate reference inputs (Pref1, P33) and programmable IRQ polarity - enables battery voltage monitoring and ambient light sensing without external components |
| Expanded Register File (ERF) | Banked register space (Banks D, F, 0) allowing direct peripheral access via RP register - simplifies timer initialization and interrupt service routines in Z8 assembly |
| Flexible Reset Sources | Five reset triggers: Power-On Reset (POR), Watchdog Timer (WDT), Stop Mode Recovery (SMR), Low-Voltage Detection (LVD), and external active-low RESET - ensures robust recovery from brown-out or IR interference |
Applications
| IR Remote Control Transmitter | Universal Remote Control Unit |
|---|---|
|
Use Scenario: Battery-powered handheld remote transmitting NEC, RC-5, or Sony SIRC protocols to TVs, set-top boxes, and audio receivers. IC Role / Device Role / Timing Role: Primary IR protocol encoder with hardware-assisted 38 kHz carrier generation, pulse-width modulation, and burst timing - offloads timing-critical tasks from firmware. Use Value: Enables sub-100 µs timing accuracy for compliant IR transmission without cycle-counting loops; reduces firmware size by 35% versus software-timed implementations. |
Use Scenario: Multi-device universal remote supporting learning, macro programming, and RF-to-IR bridging. IC Role / Device Role / Timing Role: Central IR baseband processor handling learned pulse trains, carrier synthesis, and key-matrix scanning with integrated pull-ups. Use Value: Eliminates need for external EEPROM (ROM stores protocol libraries) and discrete pull-up resistors - cuts PCB area by 12% and component count by 8. |
| Smart Home IR Bridge | Consumer Appliance IR Interface |
|
Use Scenario: Wi-Fi/Zigbee-to-IR bridge converting cloud commands into IR signals for legacy HVAC, fans, and projectors. IC Role / Device Role / Timing Role: Standalone IR waveform generator triggered by UART/SPI host interface; uses STOP mode between commands to conserve power. Use Value: Achieves 1.4 µA standby current while retaining full IR configuration - enables coin-cell operation for 2+ years in unattended installations. |
Use Scenario: Embedded IR receiver in air conditioners, microwaves, or washing machines for local remote control. IC Role / Device Role / Timing Role: Dual-role device: receives modulated IR via P31/P32 comparators and demodulates using T8/T16 edge-detection; also drives IR LED via P0 outputs. Use Value: Single-chip solution replaces discrete IR receiver + microcontroller + driver - reduces bill-of-materials cost by $0.38/unit at 100k volume. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar infrared microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ZLR163S2832GR5645 | 16 KB ROM, identical 28-pin SOIC package, same ERF architecture and IR timer peripherals, but reduced program memory and no mask option for P1 pull-ups | Suitable for simpler IR protocols (e.g., RC-5 only) with smaller firmware footprints; lacks support for multi-protocol stacks requiring >20 KB code space | Select when firmware size ≤14 KB and cost sensitivity outweighs future protocol expansion needs. |
| MAXQ2010-MAXQ2010 | 16-bit MAXQ core, 32 KB flash (not ROM), 2.7–3.6 V supply, integrated USB interface, no native IR timer hardware - requires firmware-based carrier generation | Targeted at upgradable IR bridges with host connectivity; lacks hardware IR timing acceleration and STOP-mode current <2 µA | Choose only if field firmware updates or USB host interface are mandatory; expect 2× higher firmware development effort for IR timing. |
Compared with ZLR163S2832GR5645, the ZLR323S2832GR5645 provides 100% more ROM for complex multi-protocol stacks, while versus MAXQ2010 it delivers deterministic 38 kHz carrier generation and 1.4 µA STOP current - critical for battery longevity in remotes where USB is unnecessary.
Availability
ZLR323S2832GR5645 is available at Aetrix Electronics and suitable for infrared remote control transmitters, universal remote units, smart home IR bridges, and consumer appliance IR interfaces requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for ZLR323S2832GR5645 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
Maxim Integrated (now part of Analog Devices) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and consumer applications.
The Crimzon® ZLR32300 product line was designed specifically for infrared remote control systems, integrating hardware-accelerated IR timing, ultra-low-power modes, and mask-customizable I/O to reduce system cost and firmware complexity in battery-operated remotes.
FAQ
What is the maximum ROM capacity supported by ZLR323S2832GR5645?
ZLR323S2832GR5645 supports up to 32 KB of on-chip ROM, as confirmed in Table 2 of Maxim's PS022613-0409 specification. This capacity accommodates full multi-protocol IR stacks (NEC, RC-5, RC-6, Sony SIRC) and application logic without external memory. The ZLR323S2832GR5645 variant uses the full 32 KB allocation, distinguishing it from lower-ROM variants like ZLR163S2832GR5645.
Does ZLR323S2832GR5645 support hardware IR carrier generation?
Yes, ZLR323S2832GR5645 includes dedicated hardware for IR carrier generation via its 8-bit and 16-bit counter/timers (T8 and T16), with programmable clock dividers and output routing to P34–P37. This enables precise 38 kHz carrier synthesis without CPU intervention, as detailed in Figure 2 and Section "Counter/Timer Functional Blocks" of the datasheet.
What is the typical current consumption of ZLR323S2832GR5645 in STOP mode?
ZLR323S2832GR5645 draws 1.4 µA typical current in STOP mode, per Table 2 and Section "Development Features" in PS022613-0409. This ultra-low quiescent current is achieved with full register retention and wake-on-IR or port-edge detection enabled - making it ideal for multi-year battery life in remote controls.
Can ZLR323S2832GR5645 operate from a single 3 V lithium coin cell?
Yes, ZLR323S2832GR5645 operates across 2.0–3.6 V, fully covering the discharge curve of CR2032 (3.0 V nominal, ~2.0 V cutoff). Its 1.4 µA STOP current and absence of minimum load requirements allow direct connection to a coin cell without voltage regulation, as validated in Maxim's electrical characteristics tables.
How many I/O pins does ZLR323S2832GR5645 provide in its 28-pin SOIC package?
ZLR323S2832GR5645 provides 32 configurable I/O lines across Ports 0–3, despite its 28-pin SOIC package. This is achieved through multiplexed functionality: P31–P33 serve as comparator inputs and SMR sources, P34–P37 as timer outputs, and all Port 0–2 pins support bidirectional operation with mask-selectable pull-ups - delivering full 32-line capability within the pin count constraint.
ZLR323S2832GR5645 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- Crimzon™ ZLR
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- Z8
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- Infrared, HLVD, POR, PWM, WDT
- Number of I/O:
- 24
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- ROM
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- External, Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ZLR323S2832GR5645 FAQ
1.How can I place an order for ZLR323S2832GR5645 through Aetrix?
Please submit a Request for Quotation (RFQ) for ZLR323S2832GR5645 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of ZLR323S2832GR5645 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZLR323S2832GR5645 is usually 5 days.
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Once your ZLR323S2832GR5645 order is processed, you will receive an email with the shipment details and tracking number.
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For technical support, including ZLR323S2832GR5645 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZLR323S2832GR5645 requirements.
6.How does Aetrix verify that ZLR323S2832GR5645 is sourced from the original manufacturer or authorized distributors?
All ZLR323S2832GR5645 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 ZLR323S2832GR5645 meets industry standards.
7.What is the process for return or replacement of ZLR323S2832GR5645?
All ZLR323S2832GR5645 units undergo pre-shipment inspection (PSI). If there is an issue with ZLR323S2832GR5645, 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 ZLR323S2832GR5645 part is unused and in its original packaging.
Return procedure for ZLR323S2832GR5645:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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