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Texas Instruments SN74CBT16292DLR
- Part No.:
- SN74CBT16292DLR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74CBT16292DLR.pdf
- Description:
- IC MUX/DEMUX 12 X 1:2 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,417
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Product details
Overview
SN74CBT16292DLR from Texas Instruments is a 12-bit 1-of-2 high-speed FET multiplexer/demultiplexer with TTL-compatible control inputs, 4-Ω on-state resistance, internal 500-Ω pulldown resistors, and make-before-break switching-used in high-density data routing for telecom backplanes and memory interface bus switching.
For engineers reviewing the SN74CBT16292DLR datasheet, SN74CBT16292DLR pinout, SN74CBT16292DLR application, or SN74CBT16292DLR equivalent, key selection criteria include on-resistance matching across all 12 channels, guaranteed -40°C to 85°C operation, SSOP-56 package thermal performance (θJA = 56°C/W), and compatibility with 5-V TTL logic levels.
Technical Context
This device implements a dual-path bidirectional analog switch architecture per channel, where a single select (S) input controls simultaneous connection of 12 A-port signals to either B1 or B2 ports while routing RINT to the complementary port. Each channel operates independently with no internal signal conditioning or level translation.
The internal 500-Ω pulldown resistors are connected to RINT terminals and remain active regardless of S state, ensuring defined logic states on unconnected B-side outputs. Latch-up immunity exceeds 250 mA per JESD 17, supporting robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | Typical 4 Ω at VCC = 4.5 V, enabling <100 ps propagation delay with 50-pF load. |
| Supply voltage range | 4 V to 5.5 V - compatible with standard 5-V TTL systems without level-shifting circuitry. |
| Control input thresholds | VIL ≤ 0.8 V, VIH ≥ 2 V - ensures reliable switching with legacy 5-V CMOS/TTL drivers. |
| Make-before-break time | 0–2 ns - prevents signal glitches during port switching in synchronous bus applications. |
| Pulldown resistor value | 500 Ω on RINT pins - provides deterministic low-state bias without external components. |
| Channel count | 12 independent bidirectional switch channels - supports full-width data bus routing (e.g., 12-bit address or control lines). |
| Operating temperature | -40°C to +85°C - qualified for industrial-grade embedded systems and telecom infrastructure. |
Pinout & Package
SN74CBT16292DLR is housed in a 56-pin SSOP (Shrink Small-Outline Package) with 0.635-mm lead pitch, 11.4 mm × 13.9 mm body size, and 1.2-mm max height - optimized for high-density PCB layouts with JEDEC MO-194 compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S | Select control input | Single TTL-compatible logic input determining A→B1/B2 routing direction for all 12 channels. |
| 1A–12A | Common port inputs/outputs | Bidirectional signal path; connects to B1 or B2 based on S state - no internal directionality. |
| 1B1–12B1, 1B2–12B2 | Two independent output banks | Each B1/B2 pin pair corresponds to one A pin; only one bank is active per channel at any time. |
| RINT | Internal pulldown reference | Connected internally to 500-Ω resistors tied to GND; routed to inactive B bank per channel. |
| VCC, GND | Power supply terminals | Single 5-V supply rail; two dedicated VCC and three GND pins ensure low-noise switching performance. |
| NC | No internal connection | 22 pins marked NC - must be left unconnected; no internal tie or test function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low on-resistance | 4 Ω typical enables minimal RC delay in high-speed digital signal routing (e.g., memory address buses). |
| Integrated pulldown resistors | 500-Ω resistors on RINT eliminate need for 12 discrete pull-downs in bus-hold or idle-state management. |
| Make-before-break switching | Guaranteed 0–2 ns overlap prevents momentary open-circuit faults during dynamic reconfiguration. |
| TTL-compatible control | VIH/VIL thresholds match legacy 5-V logic families - no level translators required in mixed-voltage systems. |
| Latch-up immunity | Exceeds 250 mA per JESD 17 - ensures survivability in transient-overvoltage conditions common in backplane environments. |
Applications
| Memory Bus Switching | Telecom Backplane Routing |
|---|---|
Use Scenario: Dynamic selection between two memory modules sharing a common 12-bit address/control bus in modular server architectures. IC Role / Device Role / Timing Role: Bidirectional analog switch enabling hot-swappable memory access without bus contention or signal interruption. Use Value: 4-Ω ron and sub-nanosecond tpd preserve timing margins in DDR2/DDR3 control paths up to 200 MHz. | Use Scenario: Reconfigurable signal path assignment between redundant line cards and central switching fabric in carrier-grade routers. IC Role / Device Role / Timing Role: High-reliability multiplexer providing failover-capable data routing with deterministic pulldown behavior on standby ports. Use Value: Internal 500-Ω pulldowns prevent floating nodes during card insertion/removal, eliminating spurious interrupts. |
| Industrial I/O Expansion | FPGA Configuration Multiplexing |
Use Scenario: Sharing a single microcontroller's 12-bit parallel I/O port among multiple sensor subsystems in programmable logic controllers. IC Role / Device Role / Timing Role: Low-latency demultiplexer allowing time-sliced access to isolated analog front-end or encoder interfaces. Use Value: -40°C to +85°C rating and 250 mA latch-up immunity support operation in harsh factory-floor environments. | Use Scenario: Selecting between two FPGA configuration bitstreams stored in separate PROMs during system boot or field upgrade. IC Role / Device Role / Timing Role: Glitch-free multiplexer ensuring clean transition between configuration sources using make-before-break action. Use Value: 0–2 ns MB/B window eliminates risk of partial configuration loading or FPGA startup failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit FET multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBTD16210DLR | 12-bit 1-of-2 switch with 3.3-V-only operation and no internal pulldowns; requires external biasing. | Targeted at low-voltage systems; lacks RINT functionality and industrial temp range. | Choose only if operating strictly at 3.3 V and external pull-downs are acceptable. |
| 74FST162332DLR | 12-bit dual 1-of-2 mux with identical SSOP-56 package but higher ron (8 Ω typical) and no pulldowns. | Legacy Fast CMOS family; lower speed margin and no integrated biasing for idle ports. | Use when footprint compatibility is critical but pulldown and low-ron requirements are relaxed. |
Compared with SN74CBT16292DLR, both alternatives lack integrated 500-Ω pulldowns and offer higher on-resistance - making SN74CBT16292DLR uniquely suitable for systems requiring zero-external-component bus hold and minimal propagation delay in 5-V industrial designs.
Availability
SN74CBT16292DLR is available at Aetrix Electronics and suitable for memory bus switching, telecom backplane routing, and industrial I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74CBT16292DLR 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 leader specializing in analog, embedded processing, and connectivity technologies, with over 90 years of innovation in high-reliability electronic components.
The SN74CBT16292DLR belongs to TI's Widebus™ family of high-speed FET switches, designed specifically for low-latency, bidirectional signal routing in 5-V digital systems including telecom infrastructure and industrial control hardware.
FAQ
What is the maximum continuous current rating per channel for the SN74CBT16292DLR?
The SN74CBT16292DLR supports a continuous channel current of 128 mA per switch path, verified under recommended operating conditions (VCC = 4–5.5 V, TA = –40°C to 85°C). This rating ensures safe operation in high-drive digital bus applications without thermal derating in typical PCB layouts with adequate copper area.
Does the SN74CBT16292DLR require external pull-up or pull-down resistors on its B-side terminals?
No - the SN74CBT16292DLR integrates 500-Ω pulldown resistors on all RINT terminals, which are automatically routed to the inactive B1 or B2 port per channel based on the S input state. External biasing is unnecessary for idle-state termination, reducing BOM count and layout complexity.
Can the SN74CBT16292DLR operate reliably at 3.3 V?
No - the SN74CBT16292DLR is specified only for 4 V to 5.5 V supply operation. Its TTL-compatible input thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V) and internal FET design require minimum 4 V to guarantee proper on-resistance, switching speed, and latch-up immunity. Operation below 4 V is not characterized or supported.
How does the make-before-break feature of the SN74CBT16292DLR improve system reliability?
The SN74CBT16292DLR guarantees 0–2 ns of make-before-break overlap during S-input transitions, ensuring that the new signal path is established before the previous path opens. This eliminates momentary open-circuit conditions that could cause clock glitches, metastability, or bus contention in synchronous digital systems like memory controllers or FPGA configuration interfaces.
Is the SN74CBT16292DLR pin-compatible with other devices in the Widebus™ family?
The SN74CBT16292DLR shares the SSOP-56 (DL) package footprint with several Widebus™ devices, but pin functions are not interchangeable due to unique RINT routing and dual-B-port architecture. Direct substitution requires verification of signal mapping, power pin placement, and NC pin alignment - no drop-in replacement exists within the family.
SN74CBT16292DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 12 x 1:2
- 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:
- 56-SSOP
SN74CBT16292DLR FAQ
1.How can I place an order for SN74CBT16292DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT16292DLR 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 SN74CBT16292DLR reliable?
The price and inventory of SN74CBT16292DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT16292DLR is usually 5 days.
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Once your SN74CBT16292DLR 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 SN74CBT16292DLR?
For technical support, including SN74CBT16292DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT16292DLR requirements.
6.How does Aetrix verify that SN74CBT16292DLR is sourced from the original manufacturer or authorized distributors?
All SN74CBT16292DLR 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 SN74CBT16292DLR meets industry standards.
7.What is the process for return or replacement of SN74CBT16292DLR?
All SN74CBT16292DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16292DLR, 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 SN74CBT16292DLR part is unused and in its original packaging.
Return procedure for SN74CBT16292DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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