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Texas Instruments SN74CBT16212AZQLR
- Part No.:
- SN74CBT16212AZQLR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-VFBGA
- Datasheet:
-
SN74CBT16212AZQLR.pdf
- Description:
- IC BUS FET EXCHG SW 12X2:2 56BGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,717
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Product details
Overview
SN74CBT16212AZQLR from Texas Instruments is a 24-bit high-speed TTL-compatible bus switch with 5-Ω on-state resistance, operating over −55°C to 125°C, supporting bidirectional data exchange between 12 A/B port pairs via S0–S2 select lines in VFBGA (ZQL) package - used for low-latency signal routing in aerospace-grade backplane and test instrumentation interfaces.
For engineers reviewing the SN74CBT16212AZQLR datasheet, SN74CBT16212AZQLR pinout, SN74CBT16212AZQLR application, or SN74CBT16212AZQLR equivalent, key selection criteria include its 0.25 ns typical propagation delay at 5 V, ±128 mA continuous channel current rating, latch-up immunity >250 mA per JESD 17, and Pb-free VFBGA-56 (ZQL) thermal performance of θJA = 42°C/W.
Technical Context
The SN74CBT16212AZQLR implements a 12-bit bus exchanger architecture with three control inputs (S0, S1, S2) enabling eight distinct switching configurations - including full disconnect, A-to-B port mirroring, B-to-A port mirroring, and cross-exchange modes - all with sub-nanosecond enable/disable timing. Its CMOS transmission-gate topology delivers rail-to-rail analog/digital signal pass-through without level-shifting.
Each of the 24 bidirectional channels features independent 5-Ω ron (typical), 7.5 pF off-state capacitance, and TTL-compatible control thresholds (VIL = 0.8 V, VIH = 2 V), allowing direct interfacing with legacy 5-V logic families while maintaining <3 µA ICC quiescent current at 5.5 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 4 Ω (min) to 7 Ω (max) at VCC = 4.5 V - ensures minimal voltage drop and signal distortion under 64 mA load per channel. |
| Propagation delay (tpd) | 0.25 ns (typ) at VCC = 5 V - enables sub-GHz clock domain bridging without timing closure issues. |
| Supply voltage range | 4 V to 5.5 V - compatible with standard 5-V TTL and LVTTL systems; not rated for 3.3-V operation. |
| Operating temperature | −55°C to +125°C - qualified for extended-temperature military, avionics, and downhole industrial applications. |
| Off-state capacitance (Cio(off)) | 7.5 pF - limits crosstalk and maintains signal integrity in high-density parallel bus layouts. |
| Latch-up immunity | >250 mA per JESD 17 - prevents destructive latch-up during hot-swap or ESD transients in live-backplane systems. |
| ESD protection | 200-V machine model (A115-A) - meets baseline robustness for handling in non-EPA environments. |
Pinout & Package
VFBGA-56 package (ZQL, Pb-free), 5.5 mm × 5.5 mm, 0.5 mm pitch, bottom-side ball array with exposed thermal pad; JEDEC MO-191AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0, S1, S2 | Mode-select control inputs | Determine one of eight switch configurations (e.g., A1↔B1, A1↔B2, A1↔A2+B1↔B2, or full disconnect); TTL-compatible thresholds ensure compatibility with legacy controllers. |
| A1–A12, B1–B12 | Bidirectional data terminals (24 total) | Pass signals in either direction with no polarity restriction; each pair forms an independent low-ron path when enabled. |
| VCC | Power supply | Single 4–5.5 V supply powers all 24 switches and control logic; no separate I/O voltage required. |
| GND (×4) | Ground reference | Four dedicated ground balls improve return-path integrity and reduce ground bounce across high-speed switching events. |
Key Features
| Feature | Design Value |
|---|---|
| 24-bit bidirectional bus switching | Enables flexible signal routing between two 24-bit buses or reconfiguration of 12-bit dual-port data paths without direction-control pins. |
| 5-Ω typical on-state resistance | Minimizes insertion loss and pulse distortion in high-frequency digital or analog signal paths up to 200 MHz. |
| TTL-compatible control inputs | Eliminates need for level translators when driven by legacy 5-V microcontrollers, FPGAs, or ASICs with 0.8 V/2 V thresholds. |
| −55°C to +125°C operation | Supports deployment in unheated avionics bays, engine-mounted test equipment, and space-constrained industrial controllers. |
| Low 7.5 pF off-capacitance | Reduces capacitive loading on adjacent traces, preserving signal rise/fall times and minimizing crosstalk in dense PCB layouts. |
Applications
| Aerospace Data Bus Interface | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Reconfigurable signal routing between flight computer and sensor acquisition modules in MIL-STD-1553 or ARINC 429 test fixtures. IC Role / Device Role / Timing Role: Bidirectional bus exchanger enabling dynamic A/B port mapping under FPGA control to emulate multiple bus topologies. Use Value: Eliminates mechanical relay-based switching; achieves 0.25 ns propagation delay and 128 mA per-channel drive for deterministic timing in real-time diagnostics. |
Use Scenario: High-speed DUT interface board connecting pattern generator and digitizer channels to device-under-test pins. IC Role / Device Role / Timing Role: Low-ron bus switch isolating stimulus and response paths during parallel functional testing of memory or logic ICs. Use Value: 5-Ω ron and 7.5 pF Coff preserve signal fidelity up to 200 MHz, enabling accurate edge placement and jitter measurement. |
| High-Reliability Backplane Interconnect | Legacy System Emulation Hardware |
|
Use Scenario: Hot-swap-capable midplane in ruggedized server chassis where field-replaceable line cards require isolated data lanes. IC Role / Device Role / Timing Role: Fault-isolated bus switch providing galvanic separation between card slots and backplane, controlled via system management controller. Use Value: Latch-up immunity >250 mA and −55°C to +125°C rating ensure uninterrupted operation during thermal cycling and power sequencing faults. |
Use Scenario: FPGA-based hardware emulator replicating vintage 1980s–1990s computer architectures (e.g., VMEbus, Multibus II). IC Role / Device Role / Timing Role: TTL-compatible bus exchanger reconstructing original address/data bus swapping behavior between CPU and peripheral controllers. Use Value: Direct 5-V TTL input compatibility and 0.25 ns tpd allow cycle-accurate timing replication without external buffers or delay compensation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16212ADGGR | TSSOP-56 package, −40°C to +85°C rating, θJA = 64°C/W - higher thermal resistance and narrower temp range than ZQL. | Suitable for commercial-grade ATE and industrial PLCs where extended temperature is not required. | Select when cost-sensitive volume production favors TSSOP assembly and ambient conditions remain within 0–70°C. |
| SN74CBT16212ADL | SSOP-56 package, −40°C to +85°C, θJA = 56°C/W - larger footprint (12.1 mm × 6.2 mm vs. 5.5 mm × 5.5 mm), lower density mounting. | Preferred for prototyping or legacy board redesigns using through-hole or wide-pitch surface-mount tooling. | Choose when existing SSOP land patterns exist or when manual rework accessibility outweighs size constraints. |
Compared with SN74CBT16212ADGGR and SN74CBT16212ADL, the SN74CBT16212AZQLR provides superior thermal performance (θJA = 42°C/W), extended temperature capability (−55°C to +125°C), and 50% smaller PCB area - making it the only option qualified for space-constrained, high-reliability embedded systems requiring full military-grade environmental compliance.
Availability
SN74CBT16212AZQLR is available at Aetrix Electronics and suitable for aerospace data bus interface, automated test equipment (ATE), high-reliability backplane interconnect, and legacy system emulation hardware requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for SN74CBT16212AZQLR 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 high-reliability logic solutions, with decades of heritage in military-qualified interface components.
The SN74CBT16212AZQLR belongs to TI's Widebus™ family of high-speed bus switches, engineered specifically for deterministic, low-distortion signal routing in mission-critical digital systems where timing predictability and environmental resilience are mandatory.
FAQ
What is the maximum continuous current per channel for SN74CBT16212AZQLR?
The SN74CBT16212AZQLR supports up to 128 mA continuous channel current per A/B pair, verified per absolute maximum ratings in the official datasheet (SCDS007U). This rating applies across the full −55°C to +125°C operating range and ensures safe conduction without thermal runaway or parametric shift. Exceeding this value risks permanent damage to the internal transmission gates.
Does SN74CBT16212AZQLR support 3.3-V logic control inputs?
No, SN74CBT16212AZQLR does not support 3.3-V logic control inputs. Its control inputs (S0, S1, S2) are strictly TTL-compatible with VIL = 0.8 V and VIH = 2.0 V minimum thresholds, and the device requires a 4–5.5 V VCC supply. Driving controls from 3.3-V sources may result in undefined switching behavior or failure to activate certain modes.
Can SN74CBT16212AZQLR be used for analog signal switching?
Yes, SN74CBT16212AZQLR can be used for analog signal switching due to its bidirectional, rail-to-rail CMOS transmission-gate architecture and low 5-Ω on-state resistance. It maintains signal integrity for DC-coupled analog signals up to ~200 MHz, provided source/load impedances remain >1 kΩ and voltage swing stays within the 0–VCC range.
What is the thermal resistance (θJA) of SN74CBT16212AZQLR in its ZQL package?
The SN74CBT16212AZQLR has a junction-to-ambient thermal resistance (θJA) of 42°C/W in the VFBGA-ZQL package, as specified in the "Absolute Maximum Ratings" section of SCDS007U. This value assumes standard JEDEC 2-layer board conditions and reflects the package's superior heat dissipation versus TSSOP (64°C/W) or SSOP (56°C/W) variants.
Is SN74CBT16212AZQLR pin-compatible with other members of the 'CBT16212A family?
Yes, SN74CBT16212AZQLR is functionally and pinout-compatible with all other 'CBT16212A variants (e.g., DGGR, DL, WD), sharing identical 56-terminal assignment, logic function table, and electrical behavior. The ZQL package uses the same ball map as GQL, differing only in Pb-free finish and qualification grade - confirmed by TI's package addendum and mechanical drawings.
SN74CBT16212AZQLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 56-VFBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus FET Exchange Switch
- Circuit:
- 12 x 2:2
- 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-BGA Microstar Junior (7x4.5)
SN74CBT16212AZQLR FAQ
1.How can I place an order for SN74CBT16212AZQLR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBT16212AZQLR 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 SN74CBT16212AZQLR reliable?
The price and inventory of SN74CBT16212AZQLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBT16212AZQLR is usually 5 days.
3.What payment methods are accepted for SN74CBT16212AZQLR?
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SN74CBT16212AZQLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74CBT16212AZQLR 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 SN74CBT16212AZQLR?
For technical support, including SN74CBT16212AZQLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBT16212AZQLR requirements.
6.How does Aetrix verify that SN74CBT16212AZQLR is sourced from the original manufacturer or authorized distributors?
All SN74CBT16212AZQLR 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 SN74CBT16212AZQLR meets industry standards.
7.What is the process for return or replacement of SN74CBT16212AZQLR?
All SN74CBT16212AZQLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBT16212AZQLR, 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 SN74CBT16212AZQLR part is unused and in its original packaging.
Return procedure for SN74CBT16212AZQLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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