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Analog Devices Inc. ADG3233BRJ-REEL
- Part No.:
- ADG3233BRJ-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
ADG3233BRJ-REEL.pdf
- Description:
- IC TRNSLTR BIDIRECTIONAL SOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,856
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Product details
Overview
ADG3233BRJ-REEL from Analog Devices is a bidirectional logic level translation bypass switch operating from dual supplies (1.65 V to 3.6 V each), enabling voltage translation between mismatched I/O domains in JTAG/daisy-chain systems. It supports unidirectional signal flow (A → Y), offers short-circuit protection, and delivers propagation delays as low as 3.5 ns at 3.3 V in normal mode - used for dynamic device isolation during boundary-scan testing.
For engineers reviewing the ADG3233BRJ-REEL datasheet, ADG3233BRJ-REEL pinout, ADG3233BRJ-REEL application, or ADG3233BRJ-REEL equivalent, key selection criteria include dual-supply level translation capability, EN-controlled bypass/normal mode switching, SOT-23-8 package compatibility, guaranteed operation across −40°C to +85°C, and leakage current ≤±1 µA at full supply range.
Technical Context
The ADG3233BRJ-REEL implements a submicron CMOS bypass switch architecture with two independent supply domains (VCC1 and VCC2), allowing bidirectional voltage translation while enforcing unidirectional data flow (A1→Y1/Y2). Its enable input (EN) is active-low and accepts logic levels beyond VCC1, supporting interfacing with higher-voltage controllers without level-shifting circuitry.
In normal mode (EN = high), it routes A1→Y1 and A2→Y2 with level translation; in bypass mode (EN = low), it connects A1→Y2 directly while pulling Y1 to VCC1. Both modes maintain VOL ≤0.45 V and VOH ≥VCC−0.45 V under 4 mA load, with input leakage ≤±1 µA and quiescent ICC ≤2 µA per supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | VCC1 and VCC2 independently support 1.65 V to 3.6 V - enables interoperability between 1.8 V, 2.5 V, and 3.3 V logic domains without external translators. |
| Propagation Delay | 3.5 ns (min) / 5.4 ns (typ) at 3.3 V - ensures timing compliance in high-speed JTAG chains up to 100+ MHz test clocks. |
| Enable/Disable Time | tEN = 4–7.2 ns, tDIS = 2.8–4.7 ns at 2.5–3.3 V - guarantees fast, deterministic mode switching during scan chain reconfiguration. |
| IO Leakage Current | ±1 µA max over full temperature and voltage range - minimizes standby power impact in battery-sensitive or always-on test interfaces. |
| Output Drive Strength | 8 mA sink/source capability at 3.3 V - drives standard CMOS loads (CL ≤30 pF) without external buffering in daisy-chain nodes. |
| Operating Temperature | −40°C to +85°C industrial grade - validated for use in automated test equipment (ATE), embedded debug ports, and industrial PLC programming interfaces. |
| Short-Circuit Protection | Integrated fault protection - prevents latch-up or damage during hot-plug events or miswired JTAG connections. |
Pinout & Package
ADG3233BRJ-REEL is packaged in an 8-lead SOT-23 (RJ-8) footprint measuring 2.9 mm × 2.8 mm, optimized for space-constrained board layouts in test-access and debug subsystems.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 (Pin 1) | Primary supply rail | Reference for A1, A2, Y1 inputs/outputs; sets VIH/VIL thresholds and VOH/VOL levels for Y1 path. |
| A1 (Pin 2) | Input referenced to VCC1 | Main signal input; routed to Y1 (normal) or Y2 (bypass); accepts logic levels up to 4.6 V regardless of VCC1. |
| A2 (Pin 3) | Input referenced to VCC1 | Feedback input from downstream device in normal mode; not used in bypass mode. |
| EN (Pin 4) | Active-low enable control | Low = bypass mode (A1→Y2); high = normal mode (A1→Y1, A2→Y2); immune to VCC1 overvoltage. |
| GND (Pin 5) | Digital ground reference | Common return for all digital signals; must be low-impedance and separated from analog/power grounds. |
| Y2 (Pin 6) | Output referenced to VCC2 | Level-translated output in both modes; carries VCC1-referred signal translated to VCC2 logic levels. |
| Y1 (Pin 7) | Output referenced to VCC1 | Active only in normal mode; provides VCC1-level output of A1; pulled to VCC1 in bypass mode. |
| VCC2 (Pin 8) | Secondary supply rail | Reference for Y2 output levels and internal translation circuitry; independent of VCC1 voltage. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional level translation | Supports any VCC1/VCC2 combination from 1.65 V to 3.6 V - eliminates need for discrete translator ICs in mixed-voltage JTAG chains. |
| EN-controlled bypass function | Single-pin activation isolates intermediate devices in scan chains - reduces test time by skipping non-target ICs without firmware changes. |
| Overvoltage-tolerant inputs | A1 and EN accept inputs up to 4.6 V irrespective of VCC1 - enables direct connection to 3.3 V or 5 V controllers driving 1.8 V systems. |
| Ultra-low quiescent current | ICC1/ICC2 ≤2 µA per supply - critical for portable ATE, low-power debug probes, and energy-harvesting test interfaces. |
| Short-circuit protected outputs | Withstands momentary shorts to GND or VCC without latch-up or parametric shift - improves reliability in field-serviceable test fixtures. |
Applications
| JTAG Chain Bypassing | Daisy-Chain Loop Isolation |
|---|---|
Use Scenario: Isolating defective or non-responsive ICs during IEEE 1149.1 boundary-scan testing on production PCBs. IC Role / Device Role / Timing Role: Bypass switch inserted between adjacent JTAG TDO/TDI pins; controlled via dedicated EN line from test controller. Use Value: Reduces test cycle time by 30–50% when skipping devices, avoids false-fail diagnostics caused by stuck-at faults in upstream components. |
Use Scenario: Dynamically excluding legacy peripherals from SPI/I²C daisy-chains during firmware updates or calibration sequences. IC Role / Device Role / Timing Role: Level-translating bypass node placed between master and slave devices operating at different supply voltages (e.g., 1.8 V sensor → 3.3 V MCU). Use Value: Enables voltage-domain bridging without adding propagation delay skew; maintains signal integrity across 10 Mbps data rates. |
| Programmable Logic Debug Interface | Field-Upgradeable Module Interconnect |
Use Scenario: Providing configurable test access to FPGA configuration pins (TCK/TMS/TDI/TDO) in multi-FPGA systems with heterogeneous I/O banks. IC Role / Device Role / Timing Role: Dual-rail translator managing TDO-to-TDI loopback paths across 1.2 V, 2.5 V, and 3.3 V FPGA I/O standards. Use Value: Eliminates need for manual jumpering or solder bridges during FPGA validation; supports automated test script reconfiguration. |
Use Scenario: Enabling hot-swappable module replacement in modular instrumentation systems where daughterboards operate at varying supply voltages. IC Role / Device Role / Timing Role: Bypass switch placed on inter-module communication bus (e.g., UART, SWD) to isolate failed modules during runtime. Use Value: Maintains system uptime during field maintenance; prevents bus contention when modules are inserted/removed under power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar logic level translation and bypass switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC4T245RTER | Quad-channel, direction-controlled (DIR pin), no built-in bypass logic; requires external control sequencing for chain skipping. | Used for general-purpose bidirectional level shifting, not optimized for JTAG-specific bypass functionality. | Select when needing four independent channels or DIR-based synchronous translation, not single-pin bypass activation. |
| MAX3001EASA+ | Single-channel, fixed-direction (A→B), no EN-controlled bypass mode; lacks A2 feedback path and Y1 pull-up behavior. | Suitable for point-to-point voltage translation only; cannot emulate daisy-chain skip behavior or JTAG TDO/TDI rerouting. | Choose for simple unidirectional translation where bypass capability is unnecessary and board space allows SO-8 package. |
Compared with SN74AVC4T245RTER and MAX3001EASA+, the ADG3233BRJ-REEL uniquely integrates EN-triggered bypass mode with dual-supply translation and feedback input (A2), making it the only solution that natively replicates JTAG chain skipping without external logic or firmware overhead.
Availability
ADG3233BRJ-REEL is available at Aetrix Electronics and suitable for JTAG test infrastructure, daisy-chain debug interfaces, and programmable logic configuration systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for ADG3233BRJ-REEL 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, communications, and aerospace markets.
The ADG3233BRJ-REEL belongs to Analog Devices' interface and level translation product line, engineered specifically for robust, low-latency voltage domain bridging in boundary-scan test architectures and modular system interconnects.
FAQ
What is the primary function of the ADG3233BRJ-REEL in a JTAG chain?
The ADG3233BRJ-REEL acts as a controllable bypass node in JTAG chains, allowing test equipment to skip over non-responsive or defective devices by routing TDO directly to TDI via its EN-activated bypass mode. This avoids halting the entire scan chain and reduces diagnostic time. The ADG3233BRJ-REEL achieves this using dual-supply level translation and a dedicated A2 feedback path in normal mode, ensuring signal integrity across mixed-voltage boundaries without external components.
Does the ADG3233BRJ-REEL support true bidirectional data flow?
No - the ADG3233BRJ-REEL supports bidirectional *voltage translation* but enforces strictly unidirectional *signal flow*: data travels only from A inputs to Y outputs (A1→Y1/Y2). In normal mode, A1→Y1 and A2→Y2 operate simultaneously; in bypass mode, only A1→Y2 is active. This architecture is intentional for JTAG/daisy-chain topologies where directionality is fixed by protocol definition, and the ADG3233BRJ-REEL does not implement reverse-path translation.
Can the ADG3233BRJ-REEL operate with VCC1 = 1.8 V and VCC2 = 3.3 V?
Yes - the ADG3233BRJ-REEL is fully specified for independent VCC1 and VCC2 supplies ranging from 1.65 V to 3.6 V, including asymmetric combinations like VCC1 = 1.8 V / VCC2 = 3.3 V. In this configuration, A1 and A2 inputs are referenced to 1.8 V, while Y2 output swings between 0 V and 3.3 V, enabling seamless interfacing between low-voltage FPGAs and higher-voltage microcontrollers. The ADG3233BRJ-REEL maintains VOL ≤0.45 V and VOH ≥2.85 V under 4 mA load in this condition.
What is the role of the A2 pin on the ADG3233BRJ-REEL?
The A2 pin serves as a feedback input referenced to VCC1, used exclusively in normal mode to receive the return signal from the downstream device in a JTAG or daisy-chain loop. It enables the ADG3233BRJ-REEL to complete the signal path A1→Y1→Device→A2→Y2, preserving chain continuity. A2 is inactive in bypass mode, and leaving it unconnected has no functional impact - the ADG3233BRJ-REEL operates correctly with A2 floating or tied to GND/VCC1 depending on system topology.
Is the ADG3233BRJ-REEL pin-compatible with other packages in the ADG3233 family?
Yes - the ADG3233BRJ-REEL (SOT-23-8, RJ-8) shares identical pinout and electrical specifications with the MSOP-8 variant ADG3233BRMZ (RM-8), differing only in physical package dimensions and thermal characteristics. Both use the same pin numbering and function mapping per Figure 5 and Figure 6 of the datasheet. Thus, the ADG3233BRJ-REEL can be substituted for ADG3233BRMZ in existing layouts if board space and thermal requirements permit, and vice versa - the ADG3233BRJ-REEL remains electrically identical across package variants.
ADG3233BRJ-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 1
- Voltage - VCCA:
- 1.65 V ~ 3.6 V
- Voltage - VCCB:
- 1.65 V ~ 3.6 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Non-Inverted
- Data Rate:
- 10Mbps
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Bypass Circuit
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-8
ADG3233BRJ-REEL FAQ
1.How can I place an order for ADG3233BRJ-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADG3233BRJ-REEL 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 ADG3233BRJ-REEL reliable?
The price and inventory of ADG3233BRJ-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADG3233BRJ-REEL is usually 5 days.
3.What payment methods are accepted for ADG3233BRJ-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADG3233BRJ-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADG3233BRJ-REEL?
ADG3233BRJ-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADG3233BRJ-REEL 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 ADG3233BRJ-REEL?
For technical support, including ADG3233BRJ-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADG3233BRJ-REEL requirements.
6.How does Aetrix verify that ADG3233BRJ-REEL is sourced from the original manufacturer or authorized distributors?
All ADG3233BRJ-REEL 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 ADG3233BRJ-REEL meets industry standards.
7.What is the process for return or replacement of ADG3233BRJ-REEL?
All ADG3233BRJ-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADG3233BRJ-REEL, 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 ADG3233BRJ-REEL part is unused and in its original packaging.
Return procedure for ADG3233BRJ-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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