My Inquiry
My Account
Texas Instruments SN64BCT125ADR
- Part No.:
- SN64BCT125ADR
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN64BCT125ADR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,486
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN64BCT125ADR from Texas Instruments is a quad 3-state bus buffer with independent line drivers, designed for address/data bus isolation in 5-V TTL/CMOS systems. It features 4.5–5.5 V supply operation, ±64 mA output drive, <7.7 ns propagation delay (tPHL), and high-impedance outputs during power-up/down. Used in memory address buffering and bus arbitration circuits.
For engineers reviewing the SN64BCT125ADR datasheet, SN64BCT125ADR pinout, SN64BCT125ADR application, or SN64BCT125ADR equivalent, key selection criteria include 3-state timing (tPZL/tPHZ), ICCZ current (<14 mA), bus-hold immunity, BiCMOS power efficiency, and SOIC-14 thermal performance at −40°C to 85°C.
Technical Context
This BiCMOS quad buffer implements four independent non-inverting drivers, each controlled by a dedicated active-low output-enable (OE) input. Each channel transitions to high-impedance when its OE is high, enabling bidirectional bus sharing without contention.
It operates strictly within 4.5–5.5 V VCC, supports 64 mA sink current per output, and guarantees sub-11 ns enable/disable delays (tPZL/tPHZ) under 50 pF load. Input thresholds are TTL-compatible (VIL = 0.8 V, VIH = 2.0 V), and ESD protection exceeds 2000 V per MIL-STD-883C Method 3015.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - Ensures compatibility with 5-V TTL logic rails and margin against supply droop. |
| IOL / IOH | 64 mA / −15 mA - Supports direct driving of heavy capacitive bus loads (≤50 pF) without external buffers. |
| tPHL / tPLH | 2.7–6.9 ns / 1.6–5.2 ns - Enables high-speed address/data transfer in memory and peripheral interfaces up to ~100 MHz. |
| tPZL / tPHZ | 2.8–8.6 ns / 3.0–7.4 ns - Guarantees fast, glitch-free bus release and acquisition during dynamic enable control. |
| ICCZ | 6–14 mA - Low quiescent current in 3-state mode reduces system standby power in multi-buffer configurations. |
| VIK | −1.2 V - Input clamp voltage protects against negative transients on address/data lines during hot insertion. |
| ESD Rating | >2000 V HBM - Meets industrial-level robustness for board-level handling and system integration. |
Pinout & Package
SN64BCT125ADR is supplied in a 14-pin SOIC (D) package, 3.94 mm wide, 1.75 mm max height, with 1.27 mm pitch and RoHS-compliant NiPdAu lead finish. Moisture sensitivity level is Level-1 (unlimited floor life at ≤30°C/60% RH).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 5, 10, 13 | Output-enable (OE) | Active-low control per channel; asserts high-Z state independently for each buffer when high. |
| 2, 5, 9, 12 | Input (A) | Non-inverting data input per channel; TTL-compatible thresholds ensure reliable interfacing with legacy logic. |
| 3, 6, 8, 11 | Output (Y) | Buffered, 3-state output; capable of sinking 64 mA or sourcing 15 mA into bus loads. |
| 7 | GND | Power return reference; must be low-impedance to maintain noise margin and switching integrity. |
| 14 | VCC | Positive supply rail; decoupling capacitor (0.1 µF) required adjacent to pin for transient current stability. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process technology | Reduces ICCZ by >50% vs. bipolar-only equivalents, lowering system idle power in multi-buffer bus architectures. |
| Power-up/power-down high-impedance | Prevents bus contention during supply ramping-critical for hot-swap and reset-safe memory subsystems. |
| Independent 3-state control | Enables per-line bus arbitration without global enable gating, supporting flexible memory-mapped I/O partitioning. |
| TTL-compatible input thresholds | Accepts standard 0.8 V/2.0 V logic levels-eliminates need for level-shifting when interfacing with legacy microcontrollers. |
| Low-output capacitance (Co = 9 pF) | Minimizes signal rise/fall time degradation on long PCB traces, preserving timing margins in dense layouts. |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
|
Use Scenario: Isolating CPU address bus from multiple memory banks (SRAM, EPROM) to prevent loading and contention. IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-line 3-state control acts as address demultiplexer and bus driver. Use Value: Enables concurrent access to separate memory regions using shared address lines while maintaining <7 ns propagation delay. |
Use Scenario: Interfacing an 8-bit microcontroller's data/address bus to peripheral ICs with different timing or voltage requirements. IC Role / Device Role / Timing Role: Bidirectional bus isolator that buffers and gates signals under software-controlled OE lines. Use Value: Allows safe read/write handshaking with peripherals without bus contention, leveraging sub-9 ns enable/disable response. |
| Industrial Control Backplane | Legacy System Upgrade Interface |
|
Use Scenario: Driving distributed I/O modules over extended backplane traces in PLC or motion controller racks. IC Role / Device Role / Timing Role: High-current bus repeater providing 64 mA sink capability per line to overcome trace capacitance. Use Value: Maintains signal integrity across 15+ cm traces at 10 MHz clock rates, validated over −40°C to 85°C operating range. |
Use Scenario: Retrofitting modern microprocessors into legacy TTL-based instrumentation chassis with fixed bus topology. IC Role / Device Role / Timing Role: Logic-level translator and bus driver ensuring compatibility between CMOS outputs and TTL inputs. Use Value: Eliminates need for discrete resistor networks or additional level shifters due to native 5-V TTL threshold compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74BCT244N | Octal (8-channel) configuration, identical BiCMOS process, same 4.5–5.5 V VCC and 64 mA IOL, but larger PDIP-20 package. | Supports wider buses; requires more PCB area and routing; not pin-compatible with SN64BCT125ADR's SOIC-14 layout. | Select when expanding bus width beyond 4 lines; verify layout rework for 20-pin footprint and thermal derating. |
| SN74ACT125DR | CMOS-based (not BiCMOS); lower ICCZ (~2 µA), higher VOH (4.4 V min), but reduced IOL (24 mA) and no power-up high-Z guarantee. | Better for ultra-low-power systems; unsuitable for high-current bus driving or hot-swap scenarios requiring guaranteed high-Z at VCC ramp. | Choose only if bus load ≤24 mA and power sequencing is tightly controlled; avoid where legacy TTL interface robustness is critical. |
Compared with SN74BCT244N and SN74ACT125DR, SN64BCT125ADR uniquely balances 64 mA drive strength, BiCMOS low ICCZ, and intrinsic power-rail-safe 3-state behavior-making it optimal for industrial memory and control bus isolation where reliability trumps minimal quiescent current.
Availability
SN64BCT125ADR is available at Aetrix Electronics and suitable for memory address buffering, microcontroller bus interfacing, and industrial backplane signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for SN64BCT125ADR 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 U.S.-based semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN64BCT125ADR belongs to TI's BCT (Bipolar-CMOS Transistor) logic family, engineered for high-speed, low-power bus interface applications in 5-V systems where TTL compatibility and robust bus driving are essential.
FAQ
What is the maximum operating temperature range for SN64BCT125ADR?
The SN64BCT125ADR is characterized for continuous operation from −40°C to +85°C. This extended industrial temperature range is confirmed in the absolute maximum ratings and recommended operating conditions tables of the official TI datasheet SCBS052B, making SN64BCT125ADR suitable for deployment in harsh environments such as factory automation controllers and outdoor telecom equipment.
Does SN64BCT125ADR support hot-plug or live-insertion scenarios?
Yes, SN64BCT125ADR supports hot-plug operation due to its guaranteed high-impedance state during power-up and power-down sequences. This feature prevents bus contention when VCC ramps, and is explicitly documented in the device description and functional table of the SCBS052B datasheet-critical for modular backplane and field-replaceable unit designs using SN64BCT125ADR.
What is the output drive capability of SN64BCT125ADR per channel?
SN64BCT125ADR delivers 64 mA sink current (IOL) and −15 mA source current (IOH) per output channel under recommended operating conditions (VCC = 4.5–5.5 V). These values are specified in the electrical characteristics table of SCBS052B and enable direct driving of standard 50-pF bus loads without external amplification-key for SN64BCT125ADR's role in memory and peripheral interfaces.
Is SN64BCT125ADR pin-compatible with other TI BCT-series buffers?
No, SN64BCT125ADR is not pin-compatible with other TI BCT buffers such as SN74BCT244N (PDIP-20/SOIC-20) or SN74BCT126N (different OE polarity and pinout). Its 14-pin SOIC layout with dedicated OE pins per channel (pins 1, 4, 5, 10, 13) is unique to the SN64BCT125x family, as shown in the D-package top-view diagram in SCBS052B-requiring dedicated PCB layout for SN64BCT125ADR.
What package type and RoHS status does SN64BCT125ADR have?
SN64BCT125ADR uses a 14-pin SOIC (D) package with NiPdAu lead finish and is RoHS-compliant (lead-free). This is verified in TI's Packaging Information Addendum, which lists SN64BCT125ADR as "Active" with "Yes" under RoHS and "Level-1-260C-UNLIM" moisture sensitivity rating-ensuring SN64BCT125ADR meets modern environmental and assembly requirements for surface-mount manufacturing.
SN64BCT125ADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 64BCT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 15mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SN64BCT125ADR FAQ
1.How can I place an order for SN64BCT125ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN64BCT125ADR 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 SN64BCT125ADR reliable?
The price and inventory of SN64BCT125ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT125ADR is usually 5 days.
3.What payment methods are accepted for SN64BCT125ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN64BCT125ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN64BCT125ADR?
SN64BCT125ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN64BCT125ADR 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 SN64BCT125ADR?
For technical support, including SN64BCT125ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT125ADR requirements.
6.How does Aetrix verify that SN64BCT125ADR is sourced from the original manufacturer or authorized distributors?
All SN64BCT125ADR 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 SN64BCT125ADR meets industry standards.
7.What is the process for return or replacement of SN64BCT125ADR?
All SN64BCT125ADR units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT125ADR, 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 SN64BCT125ADR part is unused and in its original packaging.
Return procedure for SN64BCT125ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN64BCT125ADR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
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…
