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Nexperia USA Inc. CBT16212DL,512
- Part No.:
- CBT16212DL,512
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
CBT16212DL,512.pdf
- Description:
- IC BUS FET EXCH SW 12X2:2 56SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,702
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Product details
Overview
CBT16212DL,512 from NXP Semiconductors is a 24-bit TTL-compatible bus exchange switch operating as either a 24-bit bus switch or a 12-bit bidirectional data exchanger across four signal ports. It features 5 Ω typical ON resistance, 0.25 ns max propagation delay, and operates from −40 °C to +85 °C in SSOP56 package. It enables high-speed data routing in memory expansion and multi-processor interconnect systems.
For engineers reviewing the CBT16212DL,512 datasheet, CBT16212DL,512 pinout, CBT16212DL,512 application, or CBT16212DL,512 equivalent, key selection criteria include port-select logic behavior (S0–S2), 12-bit output enable capability, TTL-level compatibility, sub-nanosecond timing, and SSOP56 thermal/power derating above 55 °C.
Technical Context
The CBT16212DL implements 12 independent bidirectional switch channels, each configurable via three port-select inputs (S0, S1, S2) to route signals between A1/A2 and B1/B2 ports. Its TTL-compatible inputs accept VIH ≥ 2.0 V and VIL ≤ 0.8 V, with no internal level-shifting circuitry.
Switch operation is purely analog-no latching or buffering-enabling transparent signal pass-through with minimal distortion. The device supports disconnect, cross-connect (A1↔B2 & A2↔B1), and parallel connect (A1↔B1 & A2↔B2) modes per Table 3, all with guaranteed RON ≤ 7 Ω at VCC = 4.5 V and II = 30 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | 24-bit bidirectional analog bus switch with 12-bit port-selectable exchange capability |
| ON Resistance | ≤7 Ω at VCC = 4.5 V, enabling <10 mV voltage drop at 30 mA load current |
| Propagation Delay | ≤0.25 ns (A↔B path), supporting >1 GHz signal integrity for short traces |
| Enable/Disable Time | 2.4–8.0 ns, ensuring precise timing control for synchronous bus arbitration |
| Operating Voltage | 4.0–5.5 V supply, compatible with standard 5 V TTL and mixed-voltage system rails |
| ESD Rating | HBM >1500 V, CDM >1000 V-sufficient for board-level handling without special ESD controls |
| Temperature Range | −40 °C to +85 °C ambient, validated for industrial-grade embedded controller backplanes |
Pinout & Package
CBT16212DL,512 is housed in SSOP56 (SOT371-1) package: plastic shrink small outline, 56 leads, 7.5 mm body width, 0.635 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0, S1, S2 | Port select control inputs | Determine routing mode (disconnect, A1↔B1/A2↔B2, A1↔B2/A2↔B1, etc.) per Table 3 |
| 1A1–12A1, 1A2–12A2 | A-side signal terminals | 12 pairs of input/output pins on A port; each pair connects bidirectionally to corresponding B pins |
| 1B1–12B1, 1B2–12B2 | B-side signal terminals | 12 pairs of input/output pins on B port; routed to A pins based on S0–S2 state |
| VCC | Power supply | Single 4.0–5.5 V rail; powers internal switch biasing and input buffers |
| GND (pins 8, 19, 38, 49) | Ground reference | Four dedicated ground pins minimize switching noise coupling and improve return path integrity |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | VIH ≥ 2.0 V / VIL ≤ 0.8 V-direct interface with legacy 5 V microcontrollers and FPGAs without level shifters |
| Low ON resistance | Typical 4 Ω at VCC = 4.5 V-preserves signal edge rate and reduces insertion loss in high-speed buses |
| Sub-nanosecond timing | tpd ≤ 0.25 ns-enables use in >1 GHz clock domains where gate delay must be minimized |
| Robust ESD protection | HBM >1500 V, CDM >1000 V-reduces field failure risk during PCB assembly and system integration |
| Latch-up immunity | JESD78 >100 mA-ensures reliability under transient overvoltage or hot-swap conditions |
Applications
| Memory Expansion Interface | Multi-Processor Bus Arbitration |
|---|---|
|
Use Scenario: Expanding address/data bus width between a host CPU and multiple SRAM banks using shared bus segments. IC Role / Device Role / Timing Role: Bidirectional bus exchanger that routes A1/A2 to B1/B2 ports under S0–S2 control, enabling dynamic bank selection without glue logic. Use Value: Eliminates need for discrete transceivers or CPLDs; maintains signal integrity with <0.25 ns added delay and <7 Ω series resistance. |
Use Scenario: Coordinating data exchange between two ARM Cortex-A9 cores sharing a common peripheral bus. IC Role / Device Role / Timing Role: High-speed bus switch isolating or connecting core-specific A-port signals to shared B-port peripherals based on arbitration state. Use Value: Enables deterministic sub-ns switching between master domains, avoiding metastability in asynchronous handshakes. |
| PCI/ISA Legacy Bridge | Test Access Port Multiplexing |
|
Use Scenario: Adapting 32-bit PCI signals to older 16-bit ISA slots in industrial diagnostic equipment. IC Role / Device Role / Timing Role: 24-bit bus switch configured in fixed A1↔B1 mode to translate and isolate legacy bus segments. Use Value: Provides galvanic isolation and timing transparency-no clock domain crossing or setup/hold violations introduced. |
Use Scenario: Sharing JTAG TAP controller among four FPGA devices on a single test board. IC Role / Device Role / Timing Role: Port-selectable exchanger routing TCK/TMS/TDI/TDO between controller (A1/A2) and target FPGAs (B1/B2). Use Value: Reduces test fixture complexity; eliminates manual cable swapping while preserving IEEE 1149.1 timing compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus exchange switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16212DGGR | TSSOP56 package (SOT364-1); 6.1 mm width; Ptot = 600 mW vs. 850 mW for SSOP56 | Lower power dissipation margin; suitable for space-constrained boards but requires tighter thermal layout | Select when footprint area is prioritized over thermal headroom and board-level ESD robustness |
| 74LVC16245ADGG | Direction-controlled 16-bit transceiver (not bidirectional switch); 3.3 V only; includes 3-state outputs | Requires external direction control logic; incompatible with true analog pass-through or zero-delay exchange | Choose only if system uses 3.3 V logic and needs direction-gated buffering-not for TTL-compatible analog switching |
Compared with SN74CBT16212DGGR, CBT16212DL,512 offers higher thermal margin (850 mW vs. 600 mW) and wider body for improved solder joint reliability; versus 74LVC16245ADGG, it delivers true bidirectional analog switching without direction pins or voltage translation limitations.
Availability
CBT16212DL,512 is available at Aetrix Electronics and suitable for memory expansion interfaces, multi-processor bus arbitration, and PCI/ISA legacy bridge designs requiring stable component supply across extended industrial temperature ranges.
Supply support for CBT16212DL,512 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 is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
CBT16212DL,512 belongs to NXP's legacy CBT (CrossBar TTL) family-designed specifically for high-speed, low-latency analog bus switching in 5 V digital systems where signal transparency and nanosecond timing are critical.
FAQ
Does CBT16212DL,512 support hot-swap or live-insertion?
No. The device lacks built-in hot-swap protection circuitry such as slew-rate limiting or undervoltage lockout. Applying VCC before GND or inserting into a live backplane may exceed absolute maximum ratings (e.g., VI < −0.5 V). System-level protection-such as series resistors and TVS diodes-is required for live insertion scenarios.
Can unused port-select inputs (S0–S2) be left floating?
No. Per Table 5, all unused control inputs must be tied to VCC or GND to ensure predictable routing behavior and prevent increased ICC or erratic switching. Floating S0–S2 pins may cause partial channel activation or oscillation due to TTL input threshold ambiguity near 1.3 V.
What is the maximum capacitive load this device can drive reliably?
The device is characterized with 50 pF load capacitance (Table 9), and tpd remains ≤0.25 ns under those conditions. Driving >100 pF increases propagation delay nonlinearly and may degrade edge rate; for loads exceeding 75 pF, verify signal integrity via IBIS simulation or bench measurement with actual PCB trace capacitance.
Is CBT16212DL,512 pin-compatible with CBT16212DGG?
Yes-both share identical pin configuration (SOT364-1 and SOT371-1 are pin-identical 56-lead packages), same pin functions, and identical logic behavior. Mechanical differences (body width: 6.1 mm vs. 7.5 mm) require separate footprint layouts, but schematic symbols and netlists remain interchangeable.
CBT16212DL,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74CBT
- Package/Case:
- 56-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 4V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-SSOP
CBT16212DL,512 FAQ
1.How can I place an order for CBT16212DL,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for CBT16212DL,512 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 CBT16212DL,512 reliable?
The price and inventory of CBT16212DL,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CBT16212DL,512 is usually 5 days.
3.What payment methods are accepted for CBT16212DL,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CBT16212DL,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CBT16212DL,512?
CBT16212DL,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CBT16212DL,512 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 CBT16212DL,512?
For technical support, including CBT16212DL,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CBT16212DL,512 requirements.
6.How does Aetrix verify that CBT16212DL,512 is sourced from the original manufacturer or authorized distributors?
All CBT16212DL,512 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 CBT16212DL,512 meets industry standards.
7.What is the process for return or replacement of CBT16212DL,512?
All CBT16212DL,512 units undergo pre-shipment inspection (PSI). If there is an issue with CBT16212DL,512, 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 CBT16212DL,512 part is unused and in its original packaging.
Return procedure for CBT16212DL,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CBT16212DL,512 Tags
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SN74HC138DR
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74HC154BQ,118
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P3S0200GMX
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SN74CB3Q3245PWR
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TCA9543APWR
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TCA9546APWR
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SN74HC138N
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