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Texas Instruments SN74GTL2003PWR
- Part No.:
- SN74GTL2003PWR
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74GTL2003PWR.pdf
- Description:
- IC TRANSLATOR BIDIR 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,989
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Product details
Overview
SN74GTL2003PWR from Texas Instruments is an 8-bit bidirectional NMOS pass-transistor voltage translator IC enabling level-shifting between 0.95 V and 5 V domains without direction control. It features 3.5 Ω typical ON-state resistance, <1.5 ns propagation delay at ≤20 pF load, and 5-V-tolerant inputs - used in I²C bus translation, GTL-to-LVTTL interfacing, and low-voltage processor I/O protection in HPC servers and medical dialysis systems.
For engineers reviewing the SN74GTL2003PWR datasheet, SN74GTL2003PWR pinout, SN74GTL2003PWR application, or SN74GTL2003PWR equivalent, key selection criteria include bidirectional operation without control logic, reference transistor (SREF/DREF/GREF) configuration, flow-through TSSOP-20 pinout, GTL/GTL+/LVTTL/CMOS compatibility, and hot-insertion support with no power supply required.
Technical Context
The SN74GTL2003PWR implements eight matched NMOS pass transistors (S1–S8/D1–D8) sharing a common gate (GREF) and a dedicated reference transistor (SREF/DREF). Translation direction is determined dynamically by relative voltage levels on Sn and Dn ports - no external direction signal needed.
Operation relies on clamp-based voltage referencing: SREF sets the low-voltage-side HIGH level, while DREF/GREF biasing (via 200-kΩ pullup to higher VCC) defines the reference threshold. The device supports both high-to-low and low-to-high translation modes, with ON-resistance varying from 3.5 Ω (VGREF = 4.5 V) to 105 Ω (VGREF = 1.5 V, IO = 30 mA), directly impacting VOL and drive capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Translation Range | 0.95 V ↔ 5 V bidirectional - enables interface between sub-1V processors and 3.3/5V peripherals without protocol-aware logic. |
| ON-State Resistance | 3.5 Ω typ (VGREF = 4.5 V, VI = 0 V) - ensures <350 mV VOL at 15 mA, critical for noise margin in GTL/LVTTL systems. |
| Propagation Delay | 0.5–5.5 ns (Sn↔Dn) - supports up to 50 MHz data rates at ≤20 pF load, suitable for I²C Fast-mode Plus (1 Mbps) and server backplane links. |
| ESD Rating | ±2000 V HBM - provides robust handling during board assembly and field service in industrial and medical equipment. |
| Operating Temperature | –40°C to +85°C - validated for use in dialysis machines, service routers, and HPC server chassis with airflow-limited thermal environments. |
| Reference Bias | GREF tied to DREF, pulled to higher VCC via 200-kΩ resistor - establishes stable clamping threshold; SREF connected to low-voltage core rail (e.g., 1.8 V). |
Pinout & Package
Packaged in 20-pin TSSOP (PW), 6.50 mm × 4.40 mm body size, with exposed thermal pad. Flow-through layout separates source (S1–S8/SREF) on left and drain (D1–D8/DREF/GREF) on right for minimal PCB trace crossing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1) | Ground reference | Common return path for all internal transistors; must be low-impedance connection to system ground plane. |
| SREF (2) | Source of reference transistor | Connected to low-voltage domain rail (e.g., 1.8 V); sets maximum output voltage on Sn side during high-to-low translation. |
| S1–S8 (3–10) | LVTTL/TTL source ports | Bidirectional I/O pins for lower-voltage side; tolerate 5 V, require external pullups when open-drain driven. |
| DREF (19) | Drain of reference transistor | Tied directly to GREF and pulled to higher VCC (3.3/5 V) via 200-kΩ resistor; establishes gate bias point. |
| D1–D8 (11–18) | GTL drain ports | Bidirectional I/O pins for higher-voltage side; compatible with GTL, GTL+, and CMOS logic families. |
| GREF (20) | Gate of reference transistor | Common gate node for all eight pass transistors; bias determines ON-resistance and translation threshold. |
Key Features
| Feature | Design Value |
|---|---|
| No direction control required | Eliminates need for GPIO coordination or timing-critical control signals - simplifies FPGA/CPU interface design in space-constrained systems. |
| Hot-insertion support | Enables live replacement in modular server blades and medical equipment without power cycling or risk of latch-up. |
| 5-V-tolerant inputs | Allows direct connection to legacy 5-V buses without external resistive dividers - reduces BOM count and PCB area in mixed-voltage backplanes. |
| Flow-through pinout | Minimizes layer count and trace length in dense routing environments - improves signal integrity and eases compliance with I²C bus capacitance limits (≤400 pF). |
| Integrated ESD protection | Meets ±2000 V HBM spec without external TVS diodes - lowers system-level ESD test failure rate in field-deployed networking gear. |
Applications
| Processor I²C Bus Translation | GTL-to-LVTTL Server Interfacing |
|---|---|
Use Scenario: Translating 1.8-V I²C signals from an ARM-based SoC to a 3.3-V sensor hub or EEPROM in a compact diagnostic device. IC Role / Device Role / Timing Role: Bidirectional level shifter managing SDA/SCL lines with sub-5-ns delay and no added protocol overhead. Use Value: Enables direct integration of low-power processors with standard I²C peripherals while maintaining Fast-mode Plus timing margins and eliminating direction-control firmware complexity. | Use Scenario: Interfacing GTL+ address/data buses from a high-speed memory controller to LVTTL-configured buffer ICs in an HPC server motherboard. IC Role / Device Role / Timing Role: Voltage translator providing matched 8-bit channel delay (<1.5 ns) and <350 mV VOL to preserve setup/hold timing across parallel bus traces. Use Value: Maintains signal fidelity across 100+ MHz GTL+ buses without skew-induced timing violations, reducing need for custom layout tuning or repeater insertion. |
| Low-Voltage Processor Pin Protection | Medical Equipment Signal Isolation |
Use Scenario: Protecting 0.95-V I/O pins of a next-gen microcontroller from accidental 3.3-V or 5-V exposure during debug or peripheral attachment in a dialysis machine control unit. IC Role / Device Role / Timing Role: Passive clamp-based translator acting as overvoltage barrier with zero static current draw and no power supply dependency. Use Value: Prevents permanent damage to ultra-low-voltage logic cores during maintenance or field upgrades - eliminates need for costly redesign after miswiring incidents. | Use Scenario: Isolating TTL-level control signals from a patient-monitoring ASIC to 5-V actuator drivers in a Class II medical device requiring reinforced insulation boundaries. IC Role / Device Role / Timing Role: Galvanically isolated voltage translator (when combined with optocouplers) ensuring safe signal transfer across safety barriers while preserving edge timing. Use Value: Supports IEC 60601-1 creepage/clearance requirements by decoupling logic domains without adding jitter or latency to critical therapy delivery commands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TXB0108PWR | Auto-direction sensing with integrated charge pump; requires 1.2–3.6 V and 1.65–5.5 V dual supplies; 3.5 ns max delay. | Supports wider voltage combinations but adds 10 µA quiescent current and requires external bypass caps; not suitable for zero-power hot-swap scenarios. | Choose TXB0108PWR when translating >8 bits or needing automatic direction detection; avoid if system lacks dual supplies or demands true zero-power operation. |
| SN74AVC8T245RHLR | Direction-controlled 8-bit translator with 3.6-V tolerant I/O; 2.5 ns max delay; requires DIR pin and single 1.2–3.6 V supply. | Higher speed and lower VOL (150 mV) but mandates explicit direction management - increases MCU GPIO usage and firmware complexity. | Choose SN74AVC8T245RHLR for high-speed unidirectional or direction-stable bidirectional links where precise timing control outweighs GPIO overhead. |
Compared with TXB0108PWR and SN74AVC8T245RHLR, the SN74GTL2003PWR uniquely delivers true zero-power, no-direction-pin operation with 5-V-tolerant I/O - making it optimal for hot-pluggable, ultra-low-quiescent systems like medical diagnostics and modular telecom hardware where supply simplicity and robustness are primary constraints.
Availability
SN74GTL2003PWR is available at Aetrix Electronics and suitable for HPC server backplanes, medical dialysis controllers, service router I/O expansion, and industrial embedded systems requiring stable component supply across extended product lifecycles.
Supply support for SN74GTL2003PWR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74GTL2003PWR belongs to TI's logic translator portfolio, designed specifically for robust, zero-power voltage bridging in mission-critical infrastructure where reliability, hot-swap capability, and mixed-voltage interoperability are non-negotiable.
FAQ
Does the SN74GTL2003PWR require a power supply to operate?
No, the SN74GTL2003PWR operates without any power supply connection - it functions as a passive NMOS pass transistor array biased only by external reference voltages on SREF, DREF, and GREF. This eliminates quiescent current draw and enables true zero-power hot insertion, a key advantage over active translators like the TXB0108PWR which require dual supplies. The SN74GTL2003PWR remains fully functional even when VCC is absent.
What is the correct way to configure SREF, DREF, and GREF for bidirectional I²C translation?
For bidirectional I²C translation using the SN74GTL2003PWR, connect SREF to the low-voltage I²C domain (e.g., 1.8 V), tie DREF and GREF together, and pull them to the high-voltage I²C bus rail (e.g., 3.3 V) via a 200-kΩ resistor. Add a 0.1-μF bypass capacitor from DREF to GND. This configuration establishes the clamping threshold and ensures symmetric rise/fall behavior on both SDA and SCL lines - critical for maintaining I²C timing compliance in the SN74GTL2003PWR.
Can the SN74GTL2003PWR translate between 0.95 V and 5 V in both directions simultaneously?
Yes, the SN74GTL2003PWR supports simultaneous bidirectional translation between 0.95 V and 5 V domains - for example, driving 5-V peripherals from a 0.95-V processor while accepting 5-V status responses. Its NMOS pass-gate architecture dynamically routes current based on instantaneous voltage differentials across each Sn/Dn pair, with no direction-control latency. However, proper reference biasing (SREF at 0.95 V, DREF/GREF pulled to 5 V) and external pullups on both sides are mandatory to maintain valid logic levels in the SN74GTL2003PWR.
How does the ON-state resistance of the SN74GTL2003PWR affect its VOL specification?
The SN74GTL2003PWR's ON-state resistance (3.5–105 Ω depending on VGREF and VI) directly determines its VOL: at 15 mA drive current and 3.5 Ω ron, VOL ≈ 52.5 mV; at 105 Ω and same current, VOL reaches ~1.575 V - exceeding LVTTL logic LOW thresholds. Therefore, maintaining VGREF ≥ 2.3 V (per datasheet guidance) and limiting sink current to ≤15 mA ensures VOL stays within 260–350 mV, preserving noise margin. This relationship is explicitly characterized in the SN74GTL2003PWR's electrical specifications table.
Is the SN74GTL2003PWR pin-compatible with other TSSOP-20 logic translators?
No, the SN74GTL2003PWR has a unique flow-through pinout optimized for GTL/LVTTL translation - S1–S8 and SREF occupy pins 3–10 on the left side, while D1–D8, DREF, and GREF occupy pins 11–20 on the right. This differs from standard bus transceivers (e.g., SN74LVC8T245) that group inputs/outputs by function. Substituting without PCB revision will cause signal misrouting. Always verify pin mapping against the SN74GTL2003PWR's Figure 5-2 TSSOP diagram before layout reuse.
SN74GTL2003PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74GTL
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Translator Type:
- Voltage Level
- Channel Type:
- Bidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 8
- Voltage - VCCA:
- 0.95 V ~ 5.5 V
- Voltage - VCCB:
- 0.95 V ~ 5.5 V
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- Open Drain
- Data Rate:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Features:
- Auto-Direction Sensing
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP (0.173", 4.40mm Width)
SN74GTL2003PWR FAQ
1.How can I place an order for SN74GTL2003PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74GTL2003PWR 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 SN74GTL2003PWR reliable?
The price and inventory of SN74GTL2003PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74GTL2003PWR is usually 5 days.
3.What payment methods are accepted for SN74GTL2003PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74GTL2003PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74GTL2003PWR?
SN74GTL2003PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74GTL2003PWR 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 SN74GTL2003PWR?
For technical support, including SN74GTL2003PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74GTL2003PWR requirements.
6.How does Aetrix verify that SN74GTL2003PWR is sourced from the original manufacturer or authorized distributors?
All SN74GTL2003PWR 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 SN74GTL2003PWR meets industry standards.
7.What is the process for return or replacement of SN74GTL2003PWR?
All SN74GTL2003PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74GTL2003PWR, 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 SN74GTL2003PWR part is unused and in its original packaging.
Return procedure for SN74GTL2003PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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