My Inquiry
My Account
Texas Instruments SN74CB3Q6800PWR
- Part No.:
- SN74CB3Q6800PWR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CB3Q6800PWR.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,771
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74CB3Q6800 from Texas Instruments is a 10-bit FET bus switch with precharged B-port outputs, designed for high-bandwidth bidirectional signal routing in 2.5-V/3.3-V systems. It delivers rail-to-rail switching, 4.5 Ω typical ON-state resistance (ron), <0.225 ns propagation delay, and 5-V tolerant I/Os - enabling low-distortion PCI interface and hot-plug applications.
For engineers reviewing the SN74CB3Q6800 datasheet, SN74CB3Q6800 pinout, SN74CB3Q6800 application, or SN74CB3Q6800 equivalent, key selection criteria include precharge bias voltage (BIASV) support, partial-power-down Ioff capability, 500 MHz bandwidth rating, and TSSOP-24 package compatibility with live-insertion noise mitigation requirements.
Technical Context
The SN74CB3Q6800 uses an internal charge pump to elevate gate voltage, ensuring flat, low ron across 0–5 V signal swing and supporting rail-to-rail analog/digital signal gating. Its single ON control input enables bidirectional A↔B connection when low, while B-port precharging via BIASV minimizes live-insertion glitches.
It features undervoltage clamp diodes on all data/control pins, 5-V tolerance regardless of VCC state (powered up/down), and Ioff protection that blocks backflow current during partial power-down - critical for PCIe add-in card and memory interleaving architectures requiring isolation under mixed-supply conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports dual-rail 2.5-V and 3.3-V system integration without level shifters |
| ron (Typ) | 4.5 Ω at VCC = 3.3 V - enables minimal insertion loss and near-zero propagation delay (<0.225 ns) |
| Bandwidth | Up to 500 MHz - suitable for high-speed differential signaling and broadband memory bus isolation |
| I/O Voltage Range | 0 V to 5.5 V - allows interoperability with legacy 5-V logic and modern low-voltage interfaces |
| Cio(OFF) | 3.5 pF typical - reduces capacitive loading on shared buses and preserves signal integrity |
| Ioff | 1 µA max at VCC = 0 V - ensures robust isolation and prevents damage during hot-plug events |
| BIASV Range | 0 V to 5 V - configurable precharge voltage matching receiver threshold to suppress live-insertion noise |
Pinout & Package
TSSOP-24 (PW) package: 7.9 mm × 4.5 mm × 1.2 mm body, 0.65 mm lead pitch, exposed pad not present, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (A1–A10) | A-side data I/O | Bidirectional signal path terminal; connects to upstream bus or controller when ON = L |
| 11 | GND | Power ground reference for VCC and BIASV decoupling |
| 12 | VCC | Primary supply (2.3–3.6 V); powers charge pump and internal logic |
| 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 (B1–B10) | B-side data I/O | Bidirectional signal path terminal; precharged to BIASV when ON = H |
| 23 | ON | Active-low enable; must be pulled up to VCC for power-up high-impedance safety |
| 24 | BIASV | Bias supply input (0–5 V); sets precharge level for B-port during OFF state |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Reduces live-insertion glitches by holding B-side at receiver threshold voltage (via BIASV), preventing false triggering during hot-plug |
| 5-V tolerant I/Os | Operates safely with 0–5 V signals regardless of VCC state - eliminates need for external voltage translators in mixed-supply systems |
| Charge-pump enhanced ron | Maintains flat 4.5 Ω ON-resistance across full 0–5 V input range, enabling consistent timing and minimal distortion for analog/digital signals |
| Partial-power-down support | Ioff circuitry limits reverse current to ≤1 µA when VCC = 0 V, protecting powered-down sections during hot-swap or standby modes |
| Low OFF-capacitance | 3.5 pF typical Cio(OFF) minimizes crosstalk and loading on adjacent traces in dense PCB layouts |
Applications
| PCI Hot-Plug Interface | Differential Signal Routing |
|---|---|
Use Scenario: Inserting/removing expansion cards into active PCI/PCI-X backplanes without disrupting bus operation. IC Role / Device Role / Timing Role: Bidirectional bus switch isolating card-side signals; B-port precharged to match receiver VIH/VIL thresholds. Use Value: Eliminates live-insertion noise-induced glitches by preventing B-port voltage from crossing receiver decision threshold during connector mating. | Use Scenario: Routing LVDS or RSDS differential pairs between FPGA and serializer/deserializer ICs with shared reference planes. IC Role / Device Role / Timing Role: Low-capacitance, low-ron analog switch preserving signal edge fidelity and common-mode stability. Use Value: 3.5 pF Cio(OFF) and <0.225 ns tpd maintain sub-100 ps skew across differential paths, supporting >500 MHz data rates. |
| Memory Interleaving Control | Low-Distortion Analog Gating |
Use Scenario: Dynamically selecting between two DDR2/DDR3 memory banks sharing a common controller data bus. IC Role / Device Role / Timing Role: 10-bit bidirectional switch enabling time-multiplexed access; ON control synchronized with memory bank enable signals. Use Value: 4.5 Ω ron and rail-to-rail operation prevent data-dependent voltage droop, ensuring setup/hold margin compliance across 0–1.8 V DDR signaling. | Use Scenario: Enabling/disabling audio DAC output paths in multi-zone automotive infotainment systems. IC Role / Device Role / Timing Role: Analog signal gate with 500 MHz bandwidth and 0–5 V swing support, driven by microcontroller GPIO. Use Value: Near-zero THD+N due to flat ron and absence of CMOS threshold discontinuities preserves 24-bit audio dynamic range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT6800PWR | No internal charge pump; higher ron (6 Ω typ), no BIASV pin, no precharge function | Lacks live-insertion noise suppression; unsuitable for hot-plug but lower cost for static isolation | Select when BIASV-driven glitch suppression is unnecessary and cost sensitivity outweighs hot-swap requirement |
| SN74LVC1G3157DCKR | Single-channel SPDT, no precharge, 5-V tolerant, 6 Ω ron, SC70-6 package | Not pin-compatible; limited to 1-bit routing; lacks 10-bit parallel coordination and BIASV control | Use only for point-to-point signal gating where density and multi-bit synchronization are not required |
Compared with SN74CB3Q6800, SN74CBT6800PWR offers simpler biasing but sacrifices live-insertion robustness, while SN74LVC1G3157DCKR provides footprint efficiency at the cost of scalability and precharge functionality - making SN74CB3Q6800 uniquely suited for 10-bit hot-plug–critical systems.
Availability
SN74CB3Q6800 is available at Aetrix Electronics and suitable for PCI interface design, memory interleaving, differential signal routing, and low-distortion analog gating requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for SN74CB3Q6800 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
Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The SN74CB3Q6800 belongs to TI's CB3Q family of high-bandwidth FET bus switches, engineered specifically for live-insertion–capable systems requiring glitch-free hot-plug operation, rail-to-rail signal integrity, and mixed-voltage interoperability.
FAQ
What is the maximum operating frequency supported by the SN74CB3Q6800?
The SN74CB3Q6800 supports a maximum switching frequency of 20 MHz for its ON control input under specified load conditions (RL ≥ 1 MΩ, CL = 0). Its high-bandwidth data path operates up to 500 MHz, enabling use in fast digital and analog signal routing applications where minimal propagation delay and low ON-state resistance are critical. The 500 MHz bandwidth reflects signal integrity performance, not clock rate limitation.
How does the BIASV pin function in the SN74CB3Q6800?
The BIASV pin on the SN74CB3Q6800 supplies a user-defined bias voltage (0–5 V) used to precharge the B-port outputs to a known voltage level when the device is disabled (ON = high) or powered down (VCC = 0 V). This precharge prevents live-insertion glitches by ensuring the B-port voltage remains outside the input threshold region of downstream receivers during connector mating - a key feature for PCI hot-plug compliance. The SN74CB3Q6800 internally connects B-port pins to BIASV through ~10-kΩ equivalent resistors.
Can the SN74CB3Q6800 operate with a 2.5-V supply?
Yes, the SN74CB3Q6800 is fully specified for 2.5-V operation within its recommended VCC range of 2.3 V to 3.6 V. At VCC = 2.5 V, typical ON-state resistance is 4.8 Ω, and it maintains 5-V tolerant I/Os, rail-to-rail switching, and functional precharge via BIASV. Control inputs accept TTL or CMOS levels compatible with both 2.5-V and 3.3-V systems, making the SN74CB3Q6800 suitable for mixed-supply board designs without external level translation.
Does the SN74CB3Q6800 support partial-power-down mode?
Yes, the SN74CB3Q6800 supports partial-power-down mode via its Ioff specification: when VCC = 0 V, reverse current through any I/O pin is limited to ≤1 µA, preventing damaging backflow from live buses into the unpowered device. This feature ensures safe operation during hot-swap events and enables system-level power sequencing where subsystems power up/down independently - a core requirement validated per JESD 78 Class II latch-up testing.
What package type is used for the SN74CB3Q6800PWR variant?
The SN74CB3Q6800PWR uses a TSSOP-24 (PW) package: 7.9 mm × 4.5 mm body size, 1.2 mm maximum height, 0.65 mm lead pitch, and RoHS-compliant NiPdAu lead finish. It is supplied in tape-and-reel format (2000 units per reel) with MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH), making it compatible with standard SMT assembly processes without moisture-sensitive handling restrictions.
SN74CB3Q6800PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CB
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Bus Switch
- Circuit:
- 10 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:
- 24-TSSOP
SN74CB3Q6800PWR FAQ
1.How can I place an order for SN74CB3Q6800PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CB3Q6800PWR 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 SN74CB3Q6800PWR reliable?
The price and inventory of SN74CB3Q6800PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CB3Q6800PWR is usually 5 days.
3.What payment methods are accepted for SN74CB3Q6800PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74CB3Q6800PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74CB3Q6800PWR?
SN74CB3Q6800PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CB3Q6800PWR 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 SN74CB3Q6800PWR?
For technical support, including SN74CB3Q6800PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CB3Q6800PWR requirements.
6.How does Aetrix verify that SN74CB3Q6800PWR is sourced from the original manufacturer or authorized distributors?
All SN74CB3Q6800PWR 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 SN74CB3Q6800PWR meets industry standards.
7.What is the process for return or replacement of SN74CB3Q6800PWR?
All SN74CB3Q6800PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CB3Q6800PWR, 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 SN74CB3Q6800PWR part is unused and in its original packaging.
Return procedure for SN74CB3Q6800PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74CB3Q6800PWR Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
