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Analog Devices Inc. ADG3245BRUZ-REEL7
- Part No.:
- ADG3245BRUZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ADG3245BRUZ-REEL7.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,765
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Product details
Overview
ADG3245BRUZ-REEL7 from Analog Devices is an 8-bit, 2-port, bidirectional digital bus switch with level translation capability, supporting 3.3 V to 2.5 V, 3.3 V to 1.8 V, and 2.5 V to 1.8 V voltage translation. It features 225 ps propagation delay, 4.5 Ω typical on-resistance (at VCC = 3 V, SEL = VCC, VA = 0 V), 1.244 Gbps data rate, and operates from 2.3 V to 3.6 V supply. It is used in mixed-voltage microcontroller-to-peripheral interfacing where low-delay, low-noise signal routing is critical.
For engineers reviewing the ADG3245BRUZ-REEL7 datasheet, ADG3245BRUZ-REEL7 pinout, ADG3245BRUZ-REEL7 application, or ADG3245BRUZ-REEL7 equivalent, this page delivers verified technical context, package-specific pin mapping, real-world level translation use cases, and validated alternative parts for voltage translation and bus isolation designs.
Technical Context
The ADG3245BRUZ-REEL7 implements an NMOS-based bidirectional switch architecture with integrated level-shifting control via the SEL pin. Its internal circuitry reduces effective VCC when SEL = 0 V, enabling 3.3 V → 1.8 V translation without external components. The device uses a single BE (active-low) control line to enable/disable all eight channels simultaneously.
It achieves 610 MHz small-signal bandwidth and <50 ps p-p channel jitter at 1.244 Gbps, with off-state leakage ≤±1 μA and on-resistance matching ≤0.65 Ω. The TSSOP-20 package supports flowthrough layout-A-port pins on one side, B-port on the opposite-reducing PCB trace crosstalk and simplifying routing for high-speed buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3 V to 3.6 V - Supports dual-rail operation across industrial 2.5 V/3.3 V systems without external regulators. |
| Propagation Delay (tPD) | 225 ps typ. - Enables sub-nanosecond timing alignment in high-speed parallel buses (e.g., memory address/data lines). |
| On Resistance (RON) | 4.5 Ω typ. at 0 V input - Minimizes voltage drop and power loss during signal pass-through; critical for maintaining logic high integrity. |
| Data Rate | 1.244 Gbps - Validates reliable operation up to OC-24/STM-8 telecom clock domains and fast microcontroller peripheral interfaces. |
| Level Translation Modes | 3.3 V ↔ 2.5 V, 3.3 V ↔ 1.8 V, 2.5 V ↔ 1.8 V - Configurable via SEL pin; eliminates need for discrete level shifters in multi-voltage SoC interconnects. |
| Off Capacitance (CA/B OFF) | 5 pF max. - Limits capacitive loading on isolated bus segments, preserving signal integrity during hot-swap events. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial embedded applications including base station control planes and motor drive I/O modules. |
Pinout & Package
ADG3245BRUZ-REEL7 is supplied in a 20-lead TSSOP (RU-20) package with flowthrough pinout: Port A (A0–A7) and control signals (BE, SEL, VCC, GND) on one side; Port B (B0–B7) on the opposite side. The exposed pad (EP) must be soldered to a grounded copper plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BE | Bus Enable (active low) | Global channel ON/OFF control; asserts high-impedance state when high, enabling bus isolation during hot-plug sequences. |
| SEL | Level Translation Select | When low, enables internal VCC reduction for 3.3 V → 1.8 V translation; must be tied to VCC if unused. |
| A0–A7 | Port A bidirectional I/O | Connects to higher-voltage domain (e.g., 3.3 V ADC outputs); direction is data-flow agnostic due to NMOS symmetry. |
| B0–B7 | Port B bidirectional I/O | Connects to lower-voltage domain (e.g., 1.8 V FPGA I/O banks); clamped output ensures safe interface with non-3.3 V-tolerant inputs. |
| VCC / GND | Power supply terminals | VCC sets translation reference; GND return path must be low-inductance to minimize ground bounce during switching. |
| EP | Exposed thermal pad | Internally connected to GND; mandatory thermal connection to PCB ground plane improves power dissipation and reduces junction temperature rise. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-ns propagation delay | 225 ps typical ensures minimal timing skew across all 8 channels-critical for synchronous parallel bus timing budgets. |
| Selective level translation | SEL pin configures three distinct translation modes (3.3↔2.5, 3.3↔1.8, 2.5↔1.8) without external resistors or translators. |
| Low on-resistance & matching | 4.5 Ω typical RON, ≤0.65 Ω matching minimizes differential delay and voltage droop between channels in multi-bit paths. |
| Flowthrough TSSOP layout | Opposite-side A/B pin arrangement enables straight PCB traces-reducing stub length, crosstalk, and impedance discontinuities. |
| Hot-swap ready isolation | Clamped output voltage (≤2.9 V at 3.3 V VCC) prevents overvoltage damage to downstream 1.8 V/2.5 V ICs during live insertion. |
Applications
| ADC-to-Microcontroller Interface | PCIe Slot Isolation |
|---|---|
|
Use Scenario: Interfacing a 3.3 V SAR ADC with a 2.5 V microcontroller lacking 3.3 V-tolerant GPIOs. IC Role / Device Role / Timing Role: Bidirectional level-translating bus switch placed between ADC data bus and MCU port, enabling direct connection without external logic. Use Value: Eliminates need for 8 discrete level shifters; preserves 225 ps timing alignment across all data bits for accurate sampling window capture. |
Use Scenario: Isolating PCIe slot data lanes during hot-plug insertion into a server backplane. IC Role / Device Role / Timing Role: Bus switch placed between edge connector and root complex, disabled (BE = high) during insertion to block transients. Use Value: 5 pF off-capacitance prevents signal degradation on active lanes; clamped output protects 1.8 V receiver inputs from 3.3 V overshoot. |
| FPGA-to-ASIC Voltage Bridging | DSP Memory Bus Extension |
|
Use Scenario: Connecting a 3.3 V FPGA I/O bank to a 1.8 V ASIC control interface using SEL = 0 V mode. IC Role / Device Role / Timing Role: Level-translating switch enabling bidirectional register access and status polling across voltage domains. Use Value: Internal VCC reduction under SEL = 0 V guarantees 1.8 V-compatible output swing-no external LDO or resistor divider required. |
Use Scenario: Extending a 2.5 V DSP's external memory bus to support additional SDRAM modules without violating timing margins. IC Role / Device Role / Timing Role: Low-RON switch inserted between DSP address/control lines and memory module, reducing fanout load. Use Value: 4.5 Ω RON adds negligible RC delay vs. trace capacitance; maintains setup/hold timing for 100+ MHz memory clocks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional level-translating bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC8T245RHLR | 8-bit, dual-supply (1.2–3.6 V), auto-direction sensing; no SEL pin; higher 6.5 Ω RON; 3.5 ns tPD. | Requires separate VCCA/VCCB rails; better for asymmetric voltage pairs (e.g., 1.8 V ↔ 3.3 V), but lacks ADG3245BRUZ-REEL7's sub-ns delay. | Choose for simpler dual-rail setups where direction detection is needed; avoid when <500 ps timing budget is required. |
| TXS0108EPWR | 8-bit, dual-supply (1.2–3.6 V), auto-bidirectional; 10 Ω RON; 3.8 ns tPD; no SEL pin; open-drain compatible. | Designed for I²C/SMBus; includes bus-hold and weak pull-ups; unsuitable for high-speed parallel buses due to higher delay and RON. | Prefer for low-speed control buses; not recommended for ADC/microcontroller data paths where ADG3245BRUZ-REEL7's 225 ps delay is essential. |
Compared with SN74AVC8T245RHLR and TXS0108EPWR, ADG3245BRUZ-REEL7 delivers 15× lower propagation delay and 2–3× lower on-resistance-making it uniquely suited for timing-critical, high-fanout parallel interfaces where deterministic sub-nanosecond latency is non-negotiable.
Availability
ADG3245BRUZ-REEL7 is available at Aetrix Electronics and suitable for industrial embedded systems, telecom baseband processing, and automotive body control modules requiring stable component supply, RoHS-compliant packaging, and guaranteed long-term availability.
Supply support for ADG3245BRUZ-REEL7 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, founded in 1965 and headquartered in Wilmington, MA.
The ADG3245BRUZ-REEL7 belongs to Analog Devices' precision bus switch and level translation product line, engineered specifically for low-latency, multi-voltage system interconnects in industrial, communications, and instrumentation applications.
FAQ
What voltage translation modes does the ADG3245BRUZ-REEL7 support?
The ADG3245BRUZ-REEL7 supports three translation modes: 3.3 V ↔ 2.5 V (SEL = VCC), 2.5 V ↔ 1.8 V (SEL = VCC, VCC = 2.5 V), and 3.3 V ↔ 1.8 V (SEL = 0 V). Each mode is confirmed in the datasheet's Truth Table and General Description sections, with VP specifications validating clamped output voltages per mode. The ADG3245BRUZ-REEL7 requires no external components to achieve these translations.
Is the ADG3245BRUZ-REEL7 pin-compatible with other packages of the same part number?
No-the ADG3245BRUZ-REEL7 is specific to the 20-lead TSSOP (RU-20) package. While ADG3245BCPZ uses the same die in LFCSP, pinout differs: TSSOP has flowthrough layout (A/B ports on opposite sides), whereas LFCSP uses compact interleaved arrangement. PCB layout must be redesigned when switching between ADG3245BRUZ-REEL7 and ADG3245BCPZ.
How does the SEL pin affect the ADG3245BRUZ-REEL7's level translation behavior?
When SEL = 0 V (logic low), the ADG3245BRUZ-REEL7 internally reduces its effective supply rail to enable 3.3 V → 1.8 V translation. When SEL = VCC, it supports 3.3 V → 2.5 V or 2.5 V → 1.8 V depending on applied VCC. This is explicitly defined in Table II (Truth Table) and the GENERAL DESCRIPTION section. Leaving SEL floating is prohibited; it must be tied to VCC or GND.
What is the maximum data rate supported by the ADG3245BRUZ-REEL7?
The ADG3245BRUZ-REEL7 supports up to 1.244 Gbps, measured under VCC = SEL = 3.3 V, VA/VB = 2 V p-p conditions per the SWITCHING CHARACTERISTICS table. Eye pattern validation (TPC 20) and jitter characterization (TPC 18) confirm signal integrity at this rate. Exceeding 1.244 Gbps risks increased jitter and eye closure, as no higher-rate testing is documented for ADG3245BRUZ-REEL7.
Does the ADG3245BRUZ-REEL7 require external pull-up resistors on the BE pin?
Yes-per the "High Impedance During Power-Up/Power-Down" section, BE must be tied to VCC via a pull-up resistor to ensure high-impedance (OFF) state at power-on. The minimum resistor value depends on the driver's current-sinking capability, but typical values range from 4.7 kΩ to 10 kΩ. This prevents unintended bus connection during supply ramp-up, protecting downstream devices.
ADG3245BRUZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 8 x 1:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
ADG3245BRUZ-REEL7 FAQ
1.How can I place an order for ADG3245BRUZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADG3245BRUZ-REEL7 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 ADG3245BRUZ-REEL7 reliable?
The price and inventory of ADG3245BRUZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADG3245BRUZ-REEL7 is usually 5 days.
3.What payment methods are accepted for ADG3245BRUZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADG3245BRUZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADG3245BRUZ-REEL7?
ADG3245BRUZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADG3245BRUZ-REEL7 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 ADG3245BRUZ-REEL7?
For technical support, including ADG3245BRUZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADG3245BRUZ-REEL7 requirements.
6.How does Aetrix verify that ADG3245BRUZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All ADG3245BRUZ-REEL7 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 ADG3245BRUZ-REEL7 meets industry standards.
7.What is the process for return or replacement of ADG3245BRUZ-REEL7?
All ADG3245BRUZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADG3245BRUZ-REEL7, 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 ADG3245BRUZ-REEL7 part is unused and in its original packaging.
Return procedure for ADG3245BRUZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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