My Inquiry
My Account
Texas Instruments SN64BCT125ANSR
- Part No.:
- SN64BCT125ANSR
- Manufacturer:
- Texas Instruments
- Package:
- 14-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN64BCT125ANSR.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,631
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN64BCT125ANSR from Texas Instruments is a quad 3-state bus buffer with independent line drivers, designed for address/data bus isolation in TTL-compatible systems. It operates at 4.5–5.5 V, delivers ±64 mA output drive, supports −40°C to 85°C industrial temperature range, and features high-impedance state during power-up/down - used in memory address buffering and microprocessor bus interfacing.
For engineers reviewing the SN64BCT125ANSR datasheet, SN64BCT125ANSR pinout, SN64BCT125ANSR application, or SN64BCT125ANSR equivalent, key selection criteria include 3-state control timing (tPZL ≤ 9.9 ns), BiCMOS low ICCZ (6–14 mA), ESD protection (>2000 V), and compatibility with 14-pin PDIP layouts.
Technical Context
This device implements four independent non-inverting buffers, each with dedicated active-low output-enable (OE) control. Each channel transitions to high-impedance when its OE is high, enabling bidirectional bus sharing without contention.
Its BiCMOS architecture combines bipolar input stages for TTL-level compatibility (VIH = 2 V, VIL = 0.8 V) and CMOS output stages for reduced quiescent current (ICCZ ≤ 14 mA) and fast switching (tPLH/tPHL ≤ 6.9 ns at 5 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures stable operation across standard 5 V supply rails with ±10% tolerance. |
| IOL / IOH | 64 mA / −15 mA - drives heavy capacitive loads (e.g., long PCB traces or multiple TTL inputs) without signal degradation. |
| tPZL / tPHZ | 5–9.9 ns / 3–9.4 ns - enables clean bus turn-around timing in multiplexed address/data systems. |
| ICCZ | 6–14 mA - low standby current during 3-state mode reduces system-level power in idle bus segments. |
| ESD Rating | >2000 V per MIL-STD-883C Method 3015 - provides robust handling margin during board assembly and field service. |
| Operating Temp | −40°C to 85°C - qualified for industrial-grade embedded control and instrumentation applications. |
Pinout & Package
SN64BCT125ANSR is supplied in a 14-pin plastic dual in-line package (PDIP-N), with 300-mil body width, through-hole mounting, and industry-standard pin spacing (0.1 inch). Pin 7 is GND; Pin 14 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 5, 13 | Input A (A1–A4) | Non-inverting data inputs accepting TTL-compatible logic levels (0.8 V/2 V thresholds). |
| 2, 3, 6, 8, 10, 11, 12 | Output Y / OE (Y1–Y4, OE1–OE4) | Buffered outputs and corresponding active-low enable controls - each pair operates independently. |
| 7 | GND | Power return reference for all internal logic and output stages. |
| 14 | VCC | Positive supply rail for BiCMOS core - must be decoupled locally to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Independent 3-state control per channel | Enables selective bus segment isolation without affecting other channels - critical for multi-master arbitration. |
| High-impedance during power sequencing | Prevents back-driving of powered-down subsystems during cold-start or hot-swap events. |
| BiCMOS process technology | Delivers TTL input compatibility and CMOS output drive strength while minimizing ICCZ vs. pure bipolar equivalents. |
| ESD protection >2000 V | Reduces need for external transient suppression on board-level I/O lines. |
Applications
| Memory Address Buffering | Microprocessor Bus Isolation |
|---|---|
Use Scenario: Driving 16-bit address buses between CPU and SRAM/ROM chips in industrial controllers. IC Role / Device Role / Timing Role: Quad non-inverting buffer with per-line 3-state control isolates address latches from bus contention during DMA cycles. Use Value: Ensures glitch-free address propagation with tPHL ≤ 6.9 ns and eliminates bus conflicts via independent OE gating. | Use Scenario: Interfacing an 8051-family microcontroller to peripheral ICs sharing a common data bus. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling CPU read/write access while peripherals remain electrically isolated until selected. Use Value: Leverages independent OE pins to synchronize peripheral enable timing with CPU strobes, avoiding race conditions. |
| Industrial PLC Backplane Interface | TTL-Level Signal Distribution |
Use Scenario: Distributing control signals across modular I/O racks in programmable logic controllers. IC Role / Device Role / Timing Role: Level-shifting and fan-out buffer for TTL-compatible command signals routed over 10+ cm backplane traces. Use Value: 64 mA drive capability maintains signal integrity across high-capacitance backplane loads without external amplification. | Use Scenario: Fan-out of clock or reset signals to multiple synchronous logic devices in test equipment. IC Role / Device Role / Timing Role: Low-skew, non-inverting repeater with controlled edge rates to minimize crosstalk in dense logic arrays. Use Value: Tight tPLH/tPHL matching (≤0.7 ns skew) ensures deterministic setup/hold margins across fan-out destinations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74BCT244N | Octal (8-channel) configuration; identical VCC, timing, and drive specs; same PDIP-20 package. | Higher channel count suits wider buses (e.g., 32-bit data paths); requires larger footprint and additional PCB routing. | Select when expanding bus width beyond 4 lines - no change in logic behavior or timing margins. |
| SN64BCT126ANSR | Same pinout and specs, but with active-high OE instead of active-low OE (inverted enable polarity). | Requires complementary OE signal generation - incompatible with existing active-low control logic without inversion. | Choose only if system-level OE signals are active-high; verify OE logic polarity match before substitution. |
Compared with SN74BCT244N and SN64BCT126ANSR, the SN64BCT125ANSR offers optimal channel count and active-low OE alignment for 4-line address buffering where space and control simplicity are prioritized.
Availability
SN64BCT125ANSR is available at Aetrix Electronics and suitable for industrial PLC backplanes, microprocessor bus isolation, and memory address buffering requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN64BCT125ANSR 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 logic solutions with over 50 years of industrial reliability heritage.
The BCT-series bus buffers - including SN64BCT125ANSR - were engineered for high-speed, low-power TTL-compatible interfacing in mission-critical industrial and computing systems.
FAQ
What is the function of the OE pins on the SN64BCT125ANSR?
Each OE pin (pins 1, 2, 3, and 4) controls one of the four buffer channels independently. When an OE pin is high, its corresponding output enters high-impedance (3-state) mode; when low, the buffer passes the input signal to the output. This allows dynamic bus sharing without hardware contention - a core feature of the SN64BCT125ANSR design.
Does the SN64BCT125ANSR support 3.3 V operation?
No. The SN64BCT125ANSR is specified only for 4.5 V to 5.5 V supply operation. Its TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and BiCMOS output structure require nominal 5 V rail compliance. Using 3.3 V violates recommended operating conditions and risks unreliable switching or excessive ICCZ - the SN64BCT125ANSR must operate within its defined VCC range.
What is the maximum capacitive load the SN64BCT125ANSR can drive reliably?
The SN64BCT125ANSR is characterized with CL = 50 pF in its switching specifications (e.g., tPLH, tPHL), and its 64 mA IOL rating supports driving typical PCB traces and multiple TTL inputs. While not explicitly rated for higher loads, empirical use shows stable operation up to ~100 pF with proper layout - however, timing margins degrade beyond 50 pF, so the SN64BCT125ANSR should be applied within its tested 50 pF condition for guaranteed performance.
Is the SN64BCT125ANSR RoHS compliant?
Yes. According to Texas Instruments' packaging documentation, the SN64BCT125ANSR (orderable part SN64BCT125AN) carries RoHS-compliant lead finish (NIPDAU) and meets EU Directive 2011/65/EU requirements. This applies to both tube-packaged units and reel variants - full compliance data is available in TI's official materials declaration for the SN64BCT125ANSR.
How does the SN64BCT125ANSR behave during power-up?
The SN64BCT125ANSR features inherent high-impedance state during power-up and power-down sequences. When VCC rises from 0 V to 1.3 V or falls from 1.3 V to 0 V, outputs remain in 3-state regardless of OE or input states - preventing bus contention or false writes. This behavior is guaranteed by design and documented in the absolute maximum ratings table for the SN64BCT125ANSR.
SN64BCT125ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 64BCT
- Package/Case:
- 14-SOIC (0.209", 5.30mm 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-SO
SN64BCT125ANSR FAQ
1.How can I place an order for SN64BCT125ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN64BCT125ANSR 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 SN64BCT125ANSR reliable?
The price and inventory of SN64BCT125ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN64BCT125ANSR is usually 5 days.
3.What payment methods are accepted for SN64BCT125ANSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN64BCT125ANSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN64BCT125ANSR?
SN64BCT125ANSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN64BCT125ANSR 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 SN64BCT125ANSR?
For technical support, including SN64BCT125ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN64BCT125ANSR requirements.
6.How does Aetrix verify that SN64BCT125ANSR is sourced from the original manufacturer or authorized distributors?
All SN64BCT125ANSR 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 SN64BCT125ANSR meets industry standards.
7.What is the process for return or replacement of SN64BCT125ANSR?
All SN64BCT125ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN64BCT125ANSR, 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 SN64BCT125ANSR part is unused and in its original packaging.
Return procedure for SN64BCT125ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN64BCT125ANSR 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…
