My Inquiry
My Account
Texas Instruments DS14C89AM
- Part No.:
- DS14C89AM
- Manufacturer:
- Texas Instruments
- Category:
- Drivers, Receivers, Transceivers
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS14C89AM.pdf
- Description:
- IC TRANSCEIVER 0/4 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,467
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS14C89AM from Texas Instruments (formerly National Semiconductor) is a quad CMOS RS-232 line receiver IC designed for DTE/DCE interface translation. It converts EIA-232E/V.28 voltage levels (±3V to ±15V) to TTL/CMOS logic, features 900 µA supply current at +5V, failsafe open-input high output, and on-chip noise filtering. Used in serial communication interfaces of industrial terminals and legacy PC peripherals.
For engineers reviewing the DS14C89AM datasheet, DS14C89AM pinout, DS14C89AM application, or DS14C89AM equivalent, key selection criteria include EIA-232 compliance, low-power operation, failsafe behavior, propagation delay skew ≤400 ns, and SOIC-14 package compatibility with legacy DS1489A footprints.
Technical Context
The DS14C89AM implements four independent EIA-232 receivers in a single SOIC-14 package, each with input thresholds of VTH = 1.3–2.7 V and VTL = 0.5–1.9 V, plus 1.0 V typical hysteresis. Its CMOS metal-gate process enables 900 µA typical ICC versus 26 mA in bipolar DS1489A.
It supports failsafe operation-outputs go high when inputs are open or floating-and eliminates external RC filters via integrated noise filtering. Input withstands −30 V to +30 V, and outputs drive ±3.2 mA with VOH ≥ 2.8 V and VOL ≤ 0.4 V under load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | +4.5 V to +5.5 V - compatible with standard 5 V logic rails and tolerant of typical power rail variation |
| Supply Current | 0.5 µA to 900 µA - ultra-low static power enables battery-backed or energy-sensitive serial interfaces |
| Input Thresholds | VTH = 1.3–2.7 V, VTL = 0.5–1.9 V - robust noise margin against EIA-232 signal degradation |
| Propagation Delay | tPLH/tPHL = 3.2–6.5 µs - ensures reliable 115.2 kbps UART timing with margin |
| Output Drive | VOH ≥ 2.8 V @ −3.2 mA, VOL ≤ 0.4 V @ +3.2 mA - directly interfaces 74HC/TTL loads without buffering |
| ESD Rating | ≥1.8 kV HBM - provides basic handling robustness without requiring additional protection circuitry |
| Operating Temp | 0°C to +75°C - suitable for commercial-grade embedded systems and office equipment |
Pinout & Package
DS14C89AM is housed in a 14-pin Small Outline Integrated Circuit (SOIC) package per NS Package Number M14A, with 1.27 mm pitch and body width of 3.9 mm. Pin assignments follow industry-standard quad receiver layout for drop-in replacement of DS1489A/MC1489A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | Receiver Inputs (R1IN–R4IN) | EIA-232-compatible differential inputs accepting ±3V to ±15V; internally biased for failsafe high output |
| 2, 5, 11, 14 | Receiver Outputs (R1OUT–R4OUT) | TTL/CMOS-compatible outputs driving 3.2 mA sink/source; active-high logic polarity |
| 3, 6, 7, 8, 9, 12 | GND / VCC / NC | Pins 7 & 14 = GND; Pin 14 also serves as common ground reference; Pin 14 is shared ground for all receivers |
| 14 | Power Ground (GND) | Primary ground return for all four receivers and internal bias network; must be low-impedance connection |
Key Features
| Feature | Design Value |
|---|---|
| Failsafe open-input behavior | Outputs default high when inputs float or disconnect-prevents undefined UART framing errors during cable removal or line faults |
| On-chip noise filtering | Eliminates need for external RC filter networks on response control pins, reducing BOM count and PCB area |
| Pin-for-pin compatibility with DS1489A | Direct replacement in existing designs using bipolar DS1489A; no layout change required despite 28× lower supply current |
| EIA/TIA-232-E & V.28 compliance | Validated input voltage range (−30 V to +30 V), threshold hysteresis, and timing meet full standard requirements |
Applications
| Industrial Serial Terminal Interface | Legacy PC Peripheral Adapter |
|---|---|
Use Scenario: Connecting programmable logic controllers (PLCs) to RS-232-based HMI panels with long cable runs in electrically noisy factory environments. IC Role / Device Role / Timing Role: Quad receiver translating noisy EIA-232 signals into clean TTL logic for microcontroller UART input. Use Value: On-chip noise filtering and 1.0 V hysteresis suppress induced transients; failsafe output prevents spurious resets during cable disconnection. | Use Scenario: Retrofitting ISA or LPC bus-based printer/plotter adapters with modern low-power logic while retaining DB9 connector compatibility. IC Role / Device Role / Timing Role: Level-shifting interface between 5 V microcontroller I/O and EIA-232 physical layer. Use Value: 900 µA supply current reduces thermal load in densely packed adapter cards; SOIC-14 footprint matches legacy DS1489A layouts. |
| Point-of-Sale (POS) System Backchannel | Medical Device Diagnostic Port |
Use Scenario: Bidirectional data exchange between cash register mainboard and barcode scanner or magnetic stripe reader over unshielded cables. IC Role / Device Role / Timing Role: Isolating EIA-232 signaling domain from sensitive 5 V logic domain while maintaining signal integrity. Use Value: Propagation delay skew ≤400 ns ensures simultaneous channel enable across all four receivers-critical for multi-signal handshaking (RTS/CTS/DTR/DSR). | Use Scenario: Enabling technician access to firmware logs and calibration data via RS-232 service port on Class II medical instruments. IC Role / Device Role / Timing Role: Providing fault-tolerant receive path for diagnostic commands where open-circuit detection is mandatory. Use Value: Failsafe high output guarantees known logic state during probe disconnection or cable failure-avoids unintended command execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad RS-232 receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX232ACPP | Integrated charge-pump voltage generator; dual transmitter/receiver; requires 1 µF capacitors; higher ICC (~5 mA) | Supports full RS-232 transceiver function (TxD/RxD), not receiver-only; suited for bidirectional links | Select when both transmit and receive capability is needed on same IC; not a drop-in replacement for DS14C89AM's receiver-only role |
| SN75154N | Bipolar technology; 26 mA ICC; no on-chip noise filter; requires external RC on response pins; wider temp range (−40°C to +85°C) | Higher power dissipation limits use in thermally constrained enclosures; lacks failsafe behavior | Choose only if extended temperature operation is required and board space allows external filtering components |
Compared with MAX232ACPP and SN75154N, DS14C89AM delivers lowest quiescent power and simplest implementation for dedicated receive-only RS-232 channels, with guaranteed failsafe behavior and zero external passive components required.
Availability
DS14C89AM is available at Aetrix Electronics and suitable for industrial serial terminal interface, legacy PC peripheral adapter, point-of-sale (POS) system backchannel, and medical device diagnostic port applications requiring stable component supply and long-term obsolescence management.
Supply support for DS14C89AM 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 acquired National Semiconductor in 2011 and maintains its legacy analog and interface product lines. TI is a global semiconductor leader focused on analog, embedded processing, and connectivity solutions.
The DS14C89AM belongs to National Semiconductor's legacy RS-232 interface family, engineered specifically for low-power, pin-compatible replacement of bipolar line receivers in commercial and industrial serial communication systems.
FAQ
What is the maximum input voltage rating for DS14C89AM?
The DS14C89AM supports an absolute maximum input voltage range of −30 V to +30 V, as specified in its Absolute Maximum Ratings table. This wide tolerance accommodates EIA-232 transient surges and miswiring events. Operation within recommended conditions assumes input signals conforming to EIA-232E/V.28 standards (±3 V to ±15 V). Exceeding −30 V or +30 V risks permanent damage to DS14C89AM.
Does DS14C89AM require external filter capacitors?
No, DS14C89AM does not require external filter capacitors. Its on-chip noise filtering eliminates the need for external RC networks previously used on DS1489A response control pins. When replacing DS1489A with DS14C89AM, those pins may be tied high, low, or left unconnected-reducing bill-of-materials cost and PCB real estate. This feature is confirmed in the official DS14C89A datasheet.
Is DS14C89AM pin-compatible with DS1489A?
Yes, DS14C89AM is explicitly pin-for-pin compatible with DS1489A and MC1489A, as stated in the device's General Description. Both share identical SOIC-14 pinouts (NS Package Number M14A for DS14C89AM, N14A for DS14C89AN), enabling direct replacement without PCB modification. Functional equivalence includes identical input/output pin mapping and logic polarity.
What is the operating temperature range for DS14C89AM?
The DS14C89AM is rated for operation from 0°C to +75°C ambient temperature, as defined in its Recommended Operating Conditions table. This commercial-grade range suits office equipment, industrial HMIs, and consumer electronics. It does not meet extended industrial (−40°C to +85°C) or automotive specifications. For wider temperature operation, SN75154N is a documented alternative.
How does the failsafe feature of DS14C89AM work?
The DS14C89AM implements failsafe behavior by forcing all four receiver outputs high when inputs are open, disconnected, or near-zero differential voltage. This is achieved through internal biasing circuitry that detects floating inputs and asserts a known logic state-preventing undefined UART start bits or framing errors. The feature is intrinsic to DS14C89AM's design and requires no external components or configuration.
DS14C89AM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Receiver
- Protocol:
- RS232
- Number of Drivers/Receivers:
- 0/4
- Duplex:
- -
- Receiver Hysteresis:
- 1 V
- Data Rate:
- -
- Voltage - Supply:
- 5V, 12V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
DS14C89AM FAQ
1.How can I place an order for DS14C89AM through Aetrix?
Please submit a Request for Quotation (RFQ) for DS14C89AM 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 DS14C89AM reliable?
The price and inventory of DS14C89AM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS14C89AM is usually 5 days.
3.What payment methods are accepted for DS14C89AM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS14C89AM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS14C89AM?
DS14C89AM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS14C89AM 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 DS14C89AM?
For technical support, including DS14C89AM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS14C89AM requirements.
6.How does Aetrix verify that DS14C89AM is sourced from the original manufacturer or authorized distributors?
All DS14C89AM 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 DS14C89AM meets industry standards.
7.What is the process for return or replacement of DS14C89AM?
All DS14C89AM units undergo pre-shipment inspection (PSI). If there is an issue with DS14C89AM, 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 DS14C89AM part is unused and in its original packaging.
Return procedure for DS14C89AM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS14C89AM Tags
-
ATA6561-GAQW-N
Microchip Technology
-
ATA6561-GBQW-N
Microchip Technology
-
AM26LS32ACDR
Texas Instruments
-
SP485CN-L/TR
MaxLinear, Inc.
-
SP485EN-L/TR
MaxLinear, Inc.
-
SP485EEN-L/TR
MaxLinear, Inc.
-
SP485ECN-L/TR
MaxLinear, Inc.
-
THVD1400DR
Texas Instruments
-
AM26C31IDR
Texas Instruments
-
TLIN1021ADRQ1
Texas Instruments
-
MAX232IDR
Texas Instruments
-
AM26C32IDR
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…
