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Texas Instruments 74CBT16233DGGRE4
- Part No.:
- 74CBT16233DGGRE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 56-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
74CBT16233DGGRE4.pdf
- Description:
- IC MUX/DEMUX 8 X 1:2 56TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,065
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Product details
Overview
74CBT16233DGGRE4 from Texas Instruments is a 16-bit 1-of-2 FET multiplexer/demultiplexer with 5-Ω on-state resistance, TTL-compatible control inputs (VIH = 2 V, VIL = 0.8 V), and operation over –40°C to 85°C. It enables bidirectional signal routing between one A-port and two B-ports (B1/B2) in memory interleaving, bus sharing, and data path consolidation applications.
For engineers reviewing the 74CBT16233DGGRE4 datasheet, 74CBT16233DGGRE4 pinout, 74CBT16233DGGRE4 application, or 74CBT16233DGGRE4 equivalent, key selection criteria include its 56-pin TSSOP package, 5 Ω switch resistance, 0.25 ns propagation delay (A↔B), absence of through-current during switching, and compatibility with 5-V CMOS/TTL logic drivers.
Technical Context
This device implements 16 independent analog/digital bidirectional FET switches, each controlled by dual select (SEL1/SEL2) and test (TEST1/TEST2) inputs. Its architecture avoids shoot-through current via non-overlapping gate drive timing and supports simultaneous connection of A to both B1 and B2 when TEST is asserted.
Each switch exhibits low on-resistance (5–7 Ω typical at VCC = 4.75 V), minimal off-capacitance (4 pF), and fast enable/disable times (1.3–5.3 ns). Control inputs accept 5-V TTL levels and draw only ±1 µA leakage current under recommended operating conditions (VCC = 4.75–5.25 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch On-Resistance | 5–7 Ω typical - ensures minimal voltage drop and signal attenuation for 30 mA channel current paths. |
| Propagation Delay (A↔B) | 0.25 ns typical - enables high-speed data routing without introducing significant timing skew. |
| Supply Voltage Range | 4.75–5.25 V - tightly regulated 5-V operation compatible with legacy TTL and CMOS systems. |
| Control Input Thresholds | VIH = 2 V, VIL = 0.8 V - guarantees reliable switching with standard 5-V TTL logic drivers. |
| Off-State Capacitance | 4 pF - minimizes crosstalk and loading on adjacent signal lines in dense PCB layouts. |
| Operating Temperature | –40°C to 85°C - supports industrial-grade deployment in embedded controllers and telecom infrastructure. |
| Package Type | TSSOP-56 (DGG) - surface-mount footprint with 0.5 mm pitch, 1.2 mm max height, and Q1 pin-1 orientation. |
Pinout & Package
TSSOP-56 (DGG) package: 14.1 mm × 6.2 mm body, 1.2 mm maximum height, 0.5 mm lead pitch, moisture sensitivity level 1 (260°C peak reflow), RoHS-compliant NiPdAu finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 3A, ..., 15A | A-port input/output | Odd-numbered bidirectional data terminals connected to primary path (e.g., system bus). |
| 2B1, 4B1, ..., 16B1 | B1-port input/output | Even-numbered terminals routed to first secondary path (e.g., Memory Bank 1). |
| 2B2, 4B2, ..., 16B2 | B2-port input/output | Even-numbered terminals routed to second secondary path (e.g., Memory Bank 2). |
| SEL1, SEL2 | Channel select control | Dual-bit encoding selects whether A connects to B1 (SEL=00), B2 (SEL=01), or both (TEST active). |
| TEST1, TEST2 | Test mode enable | When asserted, forces A-port connection to both B1 and B2 simultaneously for diagnostic or broadcast use. |
| VCC, GND (pins 14, 15, 40, 41) | Power supply | Dual VCC/GND pairs reduce switching noise and improve power integrity across 16 channels. |
Key Features
| Feature | Design Value |
|---|---|
| No through-current during switching | Eliminates shoot-through power spikes and reduces EMI in high-frequency data routing. |
| 5-Ω low on-resistance | Maintains signal fidelity for 30 mA digital or analog signals without significant IR drop. |
| TTL-compatible control inputs | Direct interface with legacy 5-V microcontrollers, FPGAs, and ASICs without level-shifting. |
| Bidirectional signal flow | Supports data transmission in either direction per channel-ideal for shared bus architectures. |
| Independent 16-channel operation | Enables parallel multiplexing of full 16-bit data words (e.g., address/data buses) without inter-channel coupling. |
Applications
| Memory Interleaving | PCI Bus Sharing |
|---|---|
|
Use Scenario: Two independent DRAM banks are accessed alternately to double effective bandwidth. IC Role / Device Role / Timing Role: 74CBT16233DGGRE4 routes 16-bit address/data lines between CPU and either bank based on SEL/TEST state. Use Value: Enables seamless bank switching with sub-nanosecond propagation delay and no timing penalty from switch resistance. |
Use Scenario: Multiple PCI peripherals share a single 32-bit data bus while maintaining isolation during inactive cycles. IC Role / Device Role / Timing Role: 74CBT16233DGGRE4 acts as a bidirectional bus switch, connecting one peripheral to the bus at a time. Use Value: Prevents bus contention using low-capacitance (4 pF) off-state isolation and 5 Ω on-resistance for clean signal transfer. |
| Test Access Multiplexing | Legacy System Bus Expansion |
|
Use Scenario: In-circuit test equipment must monitor or inject signals across multiple board-level traces simultaneously. IC Role / Device Role / Timing Role: 74CBT16233DGGRE4 places TEST inputs in high state to mirror A-port signals to both B1 and B2 outputs. Use Value: Provides deterministic broadcast capability without external logic, simplifying boundary-scan and functional test setups. |
Use Scenario: An industrial controller adds new I/O modules to an existing 16-bit ISA-style backplane without redesigning the motherboard. IC Role / Device Role / Timing Role: 74CBT16233DGGRE4 multiplexes legacy bus signals to alternate I/O expansion slots. Use Value: Preserves timing margins with 0.25 ns A↔B delay and eliminates need for additional bus buffers or repeaters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16233DGVR | Identical functionality and pinout; uses TVSOP-56 (DGV) package with 6.8 mm × 11.7 mm footprint and 48°C/W θJA. | Lower thermal resistance suits higher ambient temperature or sustained current operation. | Select DGVR for improved thermal performance where board space allows larger body width. |
| SN74CBT16233DLR | Same logic and electrical specs; SSOP-56 (DL) package with 11.35 mm × 18.67 mm footprint and 56°C/W θJA. | Wider lead spacing (0.65 mm) eases hand-soldering and improves mechanical robustness in vibration-prone environments. | Choose DLR for manual assembly, prototyping, or mechanically demanding industrial deployments. |
Compared with 74CBT16233DGGRE4, the DGVR offers better thermal dissipation in compact layouts, while the DLR provides greater solder-joint reliability and easier rework-neither requires PCB redesign due to identical pin mapping and signal behavior.
Availability
74CBT16233DGGRE4 is available at Aetrix Electronics and suitable for memory interleaving, PCI bus sharing, and legacy system bus expansion requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant sourcing.
Supply support for 74CBT16233DGGRE4 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 solutions, with decades of experience in high-reliability logic and interface ICs.
The CBT (CrossBar Technology) family, including the 74CBT16233DGGRE4, was engineered for low-distortion, high-speed bidirectional signal routing in 5-V digital systems such as computing backplanes and industrial controllers.
FAQ
What is the maximum continuous current rating per channel of the 74CBT16233DGGRE4?
The 74CBT16233DGGRE4 supports a continuous channel current of 128 mA per switch, verified under absolute maximum ratings. However, for reliable operation within recommended conditions, the datasheet specifies 30 mA as the test current used to characterize on-resistance (5–7 Ω), and 64 mA for VI measurement - design margins should maintain ≤64 mA per channel for long-term stability.
Does the 74CBT16233DGGRE4 require external pull-up or pull-down resistors on SEL and TEST inputs?
No - the 74CBT16233DGGRE4 does not require external biasing on SEL1, SEL2, TEST1, or TEST2. Per TI's SCBA004 application report, all unused control inputs must be held at VCC or GND, but the device's internal structure and specified VIH/VIL thresholds (2 V / 0.8 V) ensure proper logic recognition when driven directly by 5-V TTL or CMOS sources.
Can the 74CBT16233DGGRE4 be used for analog signal switching, such as audio or sensor signals?
Yes - the 74CBT16233DGGRE4 supports bidirectional analog signal routing. Its 5–7 Ω on-resistance, 4 pF off-capacitance, and absence of DC path discontinuity make it suitable for low-frequency analog signals (DC to ~100 MHz), provided signal swing remains within VCC–0.2 V to GND+0.2 V and channel current stays below 64 mA.
Is the 74CBT16233DGGRE4 pin-compatible with other members of the SN74CBT16xxx series?
No - the 74CBT16233DGGRE4 has a unique 56-pin TSSOP pinout optimized for 16-bit 1-of-2 multiplexing. Other devices like SN74CBT16210 (2×8-bit) or SN74CBT16244 (16-bit buffer) differ in function, control logic, and terminal assignment; direct substitution would cause functional failure or signal misrouting.
What is the meaning of the "E4" suffix in 74CBT16233DGGRE4?
The "E4" suffix in 74CBT16233DGGRE4 denotes Texas Instruments' green packaging standard: lead-free (Pb-free), RoHS-compliant construction with NiPdAu lead finish and halogen-free molding compound - consistent with TI's industry-standard environmental compliance labeling for active production parts.
74CBT16233DGGRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBT
- Package/Case:
- 56-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Multiplexer/Demultiplexer
- Circuit:
- 8 x 1:2
- Independent Circuits:
- 2
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-TSSOP
74CBT16233DGGRE4 FAQ
1.How can I place an order for 74CBT16233DGGRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74CBT16233DGGRE4 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 74CBT16233DGGRE4 reliable?
The price and inventory of 74CBT16233DGGRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74CBT16233DGGRE4 is usually 5 days.
3.What payment methods are accepted for 74CBT16233DGGRE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74CBT16233DGGRE4 transactions.
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4.How is shipping managed for 74CBT16233DGGRE4?
74CBT16233DGGRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74CBT16233DGGRE4 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 74CBT16233DGGRE4?
For technical support, including 74CBT16233DGGRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74CBT16233DGGRE4 requirements.
6.How does Aetrix verify that 74CBT16233DGGRE4 is sourced from the original manufacturer or authorized distributors?
All 74CBT16233DGGRE4 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 74CBT16233DGGRE4 meets industry standards.
7.What is the process for return or replacement of 74CBT16233DGGRE4?
All 74CBT16233DGGRE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74CBT16233DGGRE4, 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 74CBT16233DGGRE4 part is unused and in its original packaging.
Return procedure for 74CBT16233DGGRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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