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NXP Semiconductors CBT3245ADS,118
- Part No.:
- CBT3245ADS,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
CBT3245ADS,118.pdf
- Description:
- IC BUS SWITCH 8 X 1:1 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,007
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Product details
Overview
CBT3245ADS,118 from Nexperia is an octal bus switch IC with 8 independent single-pole single-throw analog switches, controlled by a single active-low output enable (OE) input, featuring 5 Ω typical ON resistance at 4.5 V supply, IOFF partial power-down capability, and operation from -40 °C to +85 °C for use in bidirectional data routing between TTL/CMOS buses.
For engineers reviewing the CBT3245ADS,118 datasheet, CBT3245ADS,118 pinout, CBT3245ADS,118 application, or CBT3245ADS,118 equivalent, key selection criteria include guaranteed 5 Ω switch resistance, overvoltage-tolerant OE input up to 5.5 V, sub-6 ns enable/disable timing, 20-pin SSOP package compatibility, and IOFF protection for live-insertion systems.
Technical Context
The CBT3245ADS,118 implements a passive FET-based analog switch architecture with no internal level-shifting or buffering-signals pass directly between A and B ports when enabled. Its IOFF circuitry ensures leakage current remains below 1 μA when VCC = 0 V, enabling safe hot-swap operation in backplane or modular systems.
All eight switch channels share a common OE control signal and operate synchronously. The device exhibits symmetric bidirectional conduction with identical RON and capacitance characteristics on both A and B sides, supporting true analog signal routing without polarity constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | 8-channel SPST analog bus switch with bidirectional signal path |
| ON Resistance (RON) | 5 Ω typical at VCC = 4.5 V, enabling low-loss signal transmission for 3.3 V/5 V logic |
| Enable Timing (ten) | 1.0–5.9 ns, ensuring minimal latency in high-speed bus arbitration and multiplexing |
| IOFF Support | Fully specified partial power-down mode with <1 μA leakage when VCC = 0 V |
| Input Voltage Range | -0.5 V to +7.0 V, allowing overvoltage-tolerant OE control even with 5.5 V logic |
| Operating Temperature | -40 °C to +85 °C, qualified for industrial-grade embedded and communications equipment |
| ESD Protection | HBM >2000 V, MM >150 V, CDM >1000 V-robust handling during PCB assembly and field service |
Pinout & Package
CBT3245ADS,118 is supplied in SOT724-1 (SSOP20) package: plastic shrink small outline package, 20 leads, body width 5.3 mm, pitch 0.65 mm, lead finish matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| n.c. | No-connect terminal | Pin 1 - mechanically present but electrically isolated; no soldering required |
| A1–A8 | Data port A inputs/outputs | Pins 2–9 - bidirectional analog/digital signal terminals connected to upstream bus |
| GND | Ground reference | Pin 10 - primary return path for all switch channels and internal logic |
| B1–B8 | Data port B inputs/outputs | Pins 11–18 - bidirectional analog/digital signal terminals connected to downstream bus |
| OE | Output enable (active LOW) | Pin 19 - synchronous global control; HIGH disables all switches to high-Z state |
| VCC | Positive supply voltage | Pin 20 - powers internal control logic and switch biasing; supports 4.0–5.5 V operation |
Key Features
| Feature | Design Value |
|---|---|
| 5 Ω typical ON resistance | Minimizes voltage drop and signal distortion across full 0–5 V swing, critical for TTL-level integrity |
| IOFF partial power-down | Prevents damaging back-drive current when VCC is off, enabling hot-plug expansion modules |
| Overvoltage-tolerant OE input | Accepts up to 5.5 V control signals regardless of VCC level, simplifying mixed-voltage system design |
| Sub-6 ns enable/disable times | Supports burst-mode switching in high-throughput memory and peripheral interfaces without timing violation |
| Latch-up immunity >500 mA | Guarantees robust operation under transient fault conditions per JESD78 Class II Level B |
Applications
| Memory Bus Multiplexing | Hot-Swap Backplane Interface |
|---|---|
Use Scenario: Routing address/data lines between two memory banks sharing a common controller. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling time-shared access to dual SRAM or Flash devices. Use Value: Eliminates need for direction-control logic and reduces propagation delay versus buffer-based solutions. |
Use Scenario: Isolating add-in cards during insertion/removal in telecom or server chassis. IC Role / Device Role / Timing Role: Signal gate enforcing electrical disconnect before power sequencing completes. Use Value: IOFF prevents back-powering of powered-backplane traces, meeting IEC 61000-4-2 system-level ESD requirements. |
| Level-Translation Data Bridge | TTL-Compatible Logic Analyzer Probe |
Use Scenario: Interfacing 3.3 V microcontroller GPIOs to legacy 5 V peripheral buses. IC Role / Device Role / Timing Role: Passive voltage-domain bridge with no internal translation logic. Use Value: Preserves signal edge rate and eliminates translation delay-ideal for clock or strobe forwarding. |
Use Scenario: Non-invasive sampling of 5 V TTL bus activity using a 3.3 V logic analyzer input. IC Role / Device Role / Timing Role: Low-capacitance (<7 pF off-state), low-RON signal tap point. Use Value: Reduces loading on monitored bus by >80 % compared to direct probe connection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT3245CPWR | Same 20-pin TSSOP package; RON = 6 Ω typical; ten = 2.5 ns max; IOFF not specified | Lacks IOFF support-unsuitable for partial power-down systems | Select only if IOFF is unnecessary and TI's qualification scope aligns with end-use environment |
| 74LVC245APW,118 | Octal transceiver (direction-controlled); RON not applicable; 3-state outputs; 3.3 V only | Requires external direction control and level-shifting for 5 V interfacing | Choose only when unidirectional flow and strict 3.3 V operation are acceptable |
Compared with SN74CBT3245CPWR and 74LVC245APW,118, the CBT3245ADS,118 uniquely delivers certified IOFF behavior, 5 V tolerance on OE, and lower RON-making it the only option for hot-swap-capable, bidirectional, low-distortion bus switching in mixed-voltage industrial systems.
Availability
CBT3245ADS,118 is available at Aetrix Electronics and suitable for memory bus multiplexing, hot-swap backplane interface, and TTL-compatible logic analyzer probing requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for CBT3245ADS,118 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
Nexperia is a leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with core expertise in energy-efficient, reliable, and scalable standard products.
The CBT3245ADS,118 belongs to Nexperia's CBT family of high-speed CMOS bus switches, designed specifically for low-latency, bidirectional signal routing in industrial, communications, and computing infrastructure where signal integrity and power sequencing safety are critical.
FAQ
What is the maximum supply voltage rating for CBT3245ADS,118?
The CBT3245ADS,118 has an absolute maximum supply voltage (VCC) of +7.0 V, but its recommended operating range is 4.0 V to 5.5 V. Operating above 5.5 V may compromise reliability and is not supported per the datasheet's Recommended Operating Conditions table. The CBT3245ADS,118 must be used within this 4.0–5.5 V window for guaranteed performance and lifetime compliance.
Does CBT3245ADS,118 support hot-swap or partial power-down operation?
Yes, the CBT3245ADS,118 includes fully specified IOFF circuitry that limits leakage current to less than 1 μA when VCC = 0 V and any I/O pin is biased between -0.5 V and 7.0 V. This feature enables safe live insertion and removal in backplane or modular systems. The CBT3245ADS,118 is explicitly characterized for partial power-down applications per its General Description section.
What is the pin configuration of CBT3245ADS,118 and how does it differ from CBT3245APW?
The CBT3245ADS,118 uses SOT724-1 (SSOP20) packaging with 20 leads, 5.3 mm body width, and 0.65 mm pitch-distinct from the TSSOP20 (SOT360-1) used by CBT3245APW. Pin numbering and function mapping (A1–A8, B1–B8, OE, VCC, GND, n.c.) are identical, but mechanical dimensions and thermal characteristics differ. The CBT3245ADS,118 is not pin-to-pin compatible with CBT3245APW due to package footprint variance.
Can CBT3245ADS,118 be used to route analog signals such as audio or sensor outputs?
The CBT3245ADS,118 supports bidirectional analog signal routing with 5 Ω RON and <7 pF off-state capacitance, making it suitable for DC-coupled digital signals and low-frequency analog waveforms (<10 MHz). However, it lacks rail-to-rail input range specification and is not characterized for THD, SNR, or crosstalk-so the CBT3245ADS,118 is appropriate for digital bus extension or low-fidelity analog gating, not precision audio or sensor front-end applications.
What are the ESD protection ratings for CBT3245ADS,118?
The CBT3245ADS,118 meets or exceeds HBM JESD22-A114F (>2000 V), MM JESD22-A115B (>150 V), and CDM JESD22-C101C (>1000 V) standards. These values are measured per industry-standard test methods and confirmed in the Features and Benefits section. The CBT3245ADS,118 provides robust handling margin for automated assembly and field service environments.
CBT3245ADS,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74CBT
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 8 x 1:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
CBT3245ADS,118 FAQ
1.How can I place an order for CBT3245ADS,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for CBT3245ADS,118 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 CBT3245ADS,118 reliable?
The price and inventory of CBT3245ADS,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBT3245ADS,118 is usually 5 days.
3.What payment methods are accepted for CBT3245ADS,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBT3245ADS,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CBT3245ADS,118?
CBT3245ADS,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CBT3245ADS,118 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 CBT3245ADS,118?
For technical support, including CBT3245ADS,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBT3245ADS,118 requirements.
6.How does Aetrix verify that CBT3245ADS,118 is sourced from the original manufacturer or authorized distributors?
All CBT3245ADS,118 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 CBT3245ADS,118 meets industry standards.
7.What is the process for return or replacement of CBT3245ADS,118?
All CBT3245ADS,118 units undergo pre-shipment inspection (PSI). If there is an issue with CBT3245ADS,118, 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 CBT3245ADS,118 part is unused and in its original packaging.
Return procedure for CBT3245ADS,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CBT3245ADS,118 Tags
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SN74HC138DR
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TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
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74CBTLV3257PW,118
Nexperia USA Inc.
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74HC154BQ,118
Nexperia USA Inc.
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P3S0200GMX
NXP USA Inc.
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SN74CB3Q3245PWR
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TCA9543APWR
Texas Instruments
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TCA9546APWR
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SN74HC138N
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