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NXP Semiconductors CBT6800PW,118
- Part No.:
- CBT6800PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
CBT6800PW,118.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,949
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Product details
Overview
CBT6800PW,118 from NXP Semiconductors (formerly Philips) is a 10-bit bi-directional bus switch IC with precharged B-port outputs for live insertion in hot-swap systems. It features 5 Ω on-resistance, 250 ps propagation delay at 5 V, TTL-compatible I/O, and operates from -40 °C to +85 °C. Used in backplane interconnects where signal integrity during card insertion must be preserved.
For engineers reviewing the CBT6800PW,118 datasheet, CBT6800PW,118 pinout, CBT6800PW,118 application, or CBT6800PW,118 equivalent, key selection criteria include live-insertion noise suppression via BIASV-controlled precharge, sub-1 ns enable/disable timing, and guaranteed latch-up immunity exceeding 100 mA per JESD78.
Technical Context
The CBT6800PW,118 implements a single 10-bit switch matrix controlled by one active-low OE input. When enabled, it provides near-zero-delay bi-directional conduction between A1–A10 and B1–B10 ports via low-RON MOSFET pass gates. The B-port outputs are actively precharged to a user-supplied BIASV voltage (1.3 V to VCC) through an internal ~10 kΩ equivalent resistor when disabled.
This architecture eliminates floating-bus transients during hot-plug events. Its design targets systems requiring deterministic high-speed bus isolation without added propagation skew - such as modular telecom line cards and industrial PLC backplanes operating under strict EMI and signal-integrity constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (RON) | 5 Ω typical - ensures minimal voltage drop and signal attenuation across switched paths at 30 mA current. |
| Propagation delay (tpd) | 0.25 ns typical - enables sub-nanosecond timing alignment critical for high-speed parallel bus applications. |
| Input capacitance (CIN) | 3.5 pF - reduces loading on upstream drivers and preserves edge rate integrity. |
| Off-state output capacitance (CO(OFF)) | 8.2 pF - limits crosstalk and capacitive coupling when switch is open. |
| Supply current (ICCZ) | 1 µA max (disabled state) - supports ultra-low static power in always-on system management rails. |
| BIASV voltage range | 1.3 V to VCC - allows precise control of precharge level to match system logic thresholds and minimize ground bounce. |
| Latch-up immunity | >100 mA per JESD78 - guarantees robust operation in noisy industrial environments with transient rail disturbances. |
Pinout & Package
CBT6800PW,118 is housed in a 24-pin plastic TSSOP package (SOT355-1), 4.4 mm body width, lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE (Pin 1) | Active-low output enable | Drives entire 10-bit switch; low = A↔B connected, high = B-port precharged to BIASV. |
| A1–A10 (Pins 2–11) | A-port I/O terminals | Bi-directional data path; electrically identical to B-port when switch is on; no internal biasing. |
| GND (Pin 12) | Ground reference | Primary return path for all switching currents and precharge bias network. |
| BIASV (Pin 13) | Precharge bias voltage input | User-supplied voltage sets B-port DC level during disable; determines noise margin and settling time. |
| VCC (Pin 24) | Positive supply | 5 V ±10% nominal; powers internal logic and switch driver circuitry; not used for B-port precharge current sourcing. |
| B1–B10 (Pins 14–23) | B-port I/O terminals with active pullup | Precharged to BIASV when OE high; conduct bidirectionally when OE low; require external termination only for AC matching. |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Eliminates floating-bus noise during live insertion by holding B1–B10 at stable BIASV instead of high-Z. |
| TTL-compatible I/O levels | Accepts and drives standard 5 V TTL logic without level-shifting, simplifying integration into legacy bus architectures. |
| Low 5 Ω on-resistance | Minimizes IR drop and timing skew across all 10 channels, preserving signal fidelity in parallel data paths. |
| ESD protection | 2000 V HBM / 200 V MM / 1000 V CDM - meets industrial handling requirements without external protection diodes. |
| Single-enable 10-bit architecture | Reduces control-line count versus discrete switches; enables synchronized bus isolation across full data width. |
Applications
| Telecom Line Card Backplane | Industrial PLC I/O Module |
|---|---|
|
Use Scenario: Hot-swappable line cards inserted into powered telecom chassis while maintaining backplane bus integrity. IC Role / Device Role / Timing Role: Bus switch isolating card-local data lines from shared backplane during insertion/removal. Use Value: Precharged B-port prevents glitch-induced frame errors or protocol resets by eliminating floating-bus metastability. |
Use Scenario: Modular I/O expansion slots in programmable logic controllers where field modules are replaced under power. IC Role / Device Role / Timing Role: Bidirectional data path gate enabling/disabling communication between CPU and hot-plugged I/O module. Use Value: Sub-1 ns enable/disable transitions ensure deterministic bus arbitration and prevent spurious register reads/writes. |
| Test Equipment Signal Routing | Medical Diagnostic Data Acquisition |
|
Use Scenario: Automated test systems routing multiple DUT signals through shared measurement instrumentation without cross-talk. IC Role / Device Role / Timing Role: Low-RON, low-capacitance switch selecting analog/digital channels to ADC or scope inputs. Use Value: 5 Ω RON and 8.2 pF off-capacitance preserve signal rise time and amplitude accuracy up to 100 MHz. |
Use Scenario: Configurable sensor interface boards in portable diagnostic devices requiring safe module replacement during operation. IC Role / Device Role / Timing Role: Isolation element protecting main controller from ESD and transient injection during sensor module swap. Use Value: JESD78 latch-up immunity >100 mA ensures continued operation despite repeated electrostatic discharges in clinical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD3384APW | 10-bit, 5 V, 6 Ω RON, no BIASV pin; uses internal 2.5 V precharge; higher ICCZ (5 µA). | Lacks user-adjustable precharge voltage - fixed internal bias limits flexibility in mixed-voltage systems. | Choose when BIASV control is unnecessary and board space permits larger TSSOP-24 footprint with same pinout. |
| 74LVC1G3157GW | Single-pole double-throw (SPDT), 3.3 V only, 10 Ω RON, no precharge; requires external bias network for live-insertion support. | Not a functional drop-in: 1-channel vs. 10-channel, different voltage domain, no integrated precharge. | Use only for low-density, 3.3 V-only designs where discrete implementation of precharge is acceptable. |
Compared with SN74CBTD3384APW and 74LVC1G3157GW, the CBT6800PW,118 uniquely delivers adjustable BIASV-driven precharge across all 10 channels in a 5 V system, enabling precise noise suppression tuning without external components - a capability absent in both alternatives.
Availability
CBT6800PW,118 is available at Aetrix Electronics and suitable for telecom backplane interconnects, industrial PLC I/O modules, automated test equipment signal routing, and medical diagnostic data acquisition systems requiring stable component supply and long-term lifecycle support.
Supply support for CBT6800PW,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
NXP Semiconductors, headquartered in Eindhoven, Netherlands, develops high-reliability analog and interface ICs for industrial, automotive, and communications infrastructure markets.
The CBT6800PW,118 belongs to NXP's legacy CBT (CrossBar Technology) bus switch family, designed specifically for zero-distortion hot-swap interconnect in mission-critical backplane and modular system architectures.
FAQ
What is the maximum allowable BIASV voltage for CBT6800PW,118?
The CBT6800PW,118 specifies a BIASV voltage range of −0.5 V to 6.0 V absolute maximum, but the recommended operating range is 1.3 V to VCC. For a 5 V system, applying BIASV = 3.3 V is common to reduce precharge current while maintaining noise margin. Exceeding VCC risks violating the input voltage rating of the B-port transistors and may degrade reliability over time. Always reference the CBT6800PW,118 datasheet Section "Absolute Maximum Ratings" for safe biasing limits.
Does CBT6800PW,118 support 3.3 V logic levels on its A-port inputs?
No - the CBT6800PW,118 is a 5 V-only device with TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2.0 V). While 3.3 V CMOS outputs may meet the VIH threshold, they lack sufficient noise margin and risk misinterpretation under temperature or load variation. The CBT6800PW,118 does not guarantee operation below VCC = 4.5 V, so interfacing with 3.3 V logic requires level translation. This limitation is explicitly defined in the CBT6800PW,118 "Recommended Operating Conditions" table.
Can CBT6800PW,118 be used in a 2.5 V system?
No - the CBT6800PW,118 is characterized and specified only for VCC = 4.5 V to 5.5 V. Operation at 2.5 V falls outside its recommended operating conditions and violates the minimum supply voltage specification. Attempting to run the CBT6800PW,118 at 2.5 V results in undefined switching behavior, excessive propagation delay, and potential failure to precharge the B-port correctly. For 2.5 V systems, alternative bus switches like the NXPI PCA9544A or TI SN74AVC4T245 should be evaluated instead of the CBT6800PW,118.
How does the precharge function behave when OE is high and BIASV is left unconnected?
Leaving BIASV unconnected on the CBT6800PW,118 causes the B-port to float during disable, defeating the core live-insertion benefit. The internal 10 kΩ precharge path requires a defined voltage source; an open BIASV pin introduces unpredictable leakage paths and may result in slow, noisy B-port settling. The CBT6800PW,118 datasheet mandates connection to a stable voltage within 1.3 V to VCC. If no external bias is available, tie BIASV to VCC or GND using appropriate series resistance to limit current - never leave it floating. This requirement is documented in the CBT6800PW,118 "Pin Description" and "Recommended Operating Conditions" sections.
Is CBT6800PW,118 pin-compatible with other CBT-series devices like CBT3244 or CBT3383?
No - the CBT6800PW,118 has a unique 24-pin TSSOP pinout optimized for its 10-bit + BIASV + OE architecture. Devices like CBT3244 (8-bit, no BIASV) and CBT3383 (12-bit, different enable scheme) use distinct pin assignments and internal configurations. Even though all belong to the CBT family, the CBT6800PW,118 pinout is not interchangeable; substituting it for another CBT device requires PCB redesign. This non-compatibility is confirmed by comparing the "Pin Configuration" diagrams in each respective datasheet, including the CBT6800PW,118 SOT355-1 layout.
CBT6800PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74CBT
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 10 x 1:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
CBT6800PW,118 FAQ
1.How can I place an order for CBT6800PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for CBT6800PW,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 CBT6800PW,118 reliable?
The price and inventory of CBT6800PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBT6800PW,118 is usually 5 days.
3.What payment methods are accepted for CBT6800PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBT6800PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CBT6800PW,118?
CBT6800PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CBT6800PW,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 CBT6800PW,118?
For technical support, including CBT6800PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBT6800PW,118 requirements.
6.How does Aetrix verify that CBT6800PW,118 is sourced from the original manufacturer or authorized distributors?
All CBT6800PW,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 CBT6800PW,118 meets industry standards.
7.What is the process for return or replacement of CBT6800PW,118?
All CBT6800PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with CBT6800PW,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 CBT6800PW,118 part is unused and in its original packaging.
Return procedure for CBT6800PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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