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Texas Instruments SN74LV595AQPWRQ1
- Part No.:
- SN74LV595AQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Shift Registers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV595AQPWRQ1.pdf
- Description:
- IC SHIFT REG 8BIT 3ST 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,852
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Product details
Overview
SN74LV595AQPWRQ1 from Texas Instruments is an automotive-grade 8-bit serial-in, parallel-out shift register with 3-state output registers, operating from 2 V to 5.5 V, featuring separate SRCLK and RCLK clocks, direct SRCLR input, and Ioff partial-power-down support. It drives LED matrices and 7-segment displays in vehicle infotainment and instrument cluster interfaces.
For engineers reviewing the SN74LV595AQPWRQ1 datasheet, SN74LV595AQPWRQ1 pinout, SN74LV595AQPWRQ1 application, or SN74LV595AQPWRQ1 equivalent, key selection factors include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), wettable-flank TSSOP-16 package, 3-state output enable control, and cascading serial output (QH′) for multi-device daisy-chaining.
Technical Context
The SN74LV595AQPWRQ1 integrates two synchronous logic stages: a positive-edge-triggered 8-bit shift register accepting serial data via SER and clocked by SRCLK, and an independent 8-bit D-type storage register loaded on RCLK's rising edge. Its dual-clock architecture enables precise timing separation between data shifting and output latching.
Output control is implemented through an active-low OE input that places QA–QH into high-impedance while leaving QH′ functional - enabling seamless serial cascade without external gating. The device employs balanced CMOS 3-state outputs with ±8 mA drive at 3.3 V and supports mixed-voltage I/O with 5-V-tolerant inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports direct interface with 2.5 V, 3.3 V, and 5 V logic domains without level shifters. |
| Operating Temperature | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood and dashboard applications. |
| Max Output Drive | ±8 mA at VCC = 3.3 V - sufficient for direct LED segment driving with current-limiting resistors. |
| Propagation Delay | 7.9 ns (tPLH, RCLK→QA–QH, VCC = 3.3 V) - enables >50 MHz operation in buffered cascaded configurations. |
| Ioff Current | ≤10 µA at VCC = 0 V - prevents backflow during hot-swap or partial power-down in modular ECUs. |
| ESD Rating | HBM ±2000 V - meets automotive system-level ESD robustness requirements per ISO 10605. |
| Package | TSSOP-16 (PW), 5.00 mm × 4.40 mm - surface-mount compatible with standard reflow profiles and AOI inspection. |
Pinout & Package
SN74LV595AQPWRQ1 is packaged in a 16-pin TSSOP (PW) with wettable flanks for automated optical inspection. Thermal pad is not present - unlike the WBQB variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 8) | Power reference | Primary ground return path; must be low-impedance for noise immunity in automotive environments. |
| VCC (Pin 16) | Supply input | 2–5.5 V main supply; decoupling capacitor required within 10 mm for transient suppression. |
| SER (Pin 14) | Serial data input | Accepts LSB-first or MSB-first bitstream; 5-V-tolerant for interfacing with higher-voltage controllers. |
| SRCLK (Pin 11) | Shift register clock | Positive-edge-triggered; controls bit advancement through shift register only - no effect on outputs. |
| RCLK (Pin 12) | Storage register clock | Positive-edge-triggered; latches all 8 bits from shift register to QA–QH outputs simultaneously. |
| SRCLR (Pin 10) | Asynchronous clear | Active-low; resets shift register to all zeros regardless of clock state - critical for deterministic startup. |
| OE (Pin 13) | Output enable | Active-high; disables QA–QH (high-Z) but leaves QH′ functional for daisy-chain continuity. |
| QH′ (Pin 9) | Serial output | Inverted output of QH; enables cascading to next SN74LV595AQPWRQ1 without external inverters. |
| QA–QH (Pins 15,1,2,3,4,5,6,7) | Parallel outputs | CMOS 3-state outputs; individually controllable via OE - supports dynamic bus sharing in multiplexed displays. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for continuous operation from –40°C to +125°C ambient - suitable for engine control, ADAS sensor hubs, and HVAC modules. |
| Wettable flank TSSOP package | Enhanced side-fillet formation enables reliable automated optical inspection (AOI) in high-volume automotive PCB assembly. |
| Independent shift/storage clocks | Eliminates need for clock domain synchronization logic - simplifies microcontroller firmware for real-time display updates. |
| Ioff partial-power-down protection | Prevents damaging current flow when VCC is unpowered but I/O lines remain active - essential for modular ECU hot-swap designs. |
| QH′ serial output | Provides inverted cascade output without external logic - reduces BOM count and board space in multi-digit LED driver stacks. |
Applications
| LED Matrix Control | 7-Segment Display Driver |
|---|---|
Use Scenario: Driving 8×8 monochrome LED arrays in automotive ambient lighting or status indicators. IC Role / Device Role / Timing Role: Serial-to-parallel converter providing column scan signals with synchronized latch timing via RCLK. Use Value: Enables microcontroller GPIO expansion using single SPI line plus two control pins - reducing MCU pin count and firmware complexity. | Use Scenario: Controlling up to eight 7-segment digits in digital instrument clusters or center-stack displays. IC Role / Device Role / Timing Role: Output expander buffering multiplexed segment data; OE toggling enables digit-by-digit blanking for flicker-free rendering. Use Value: Eliminates need for discrete transistors or dedicated display drivers - lowers system cost and improves thermal margin in confined dash enclosures. |
| Automotive Body Control Module (BCM) | Infotainment System I/O Expansion |
Use Scenario: Managing indicator LEDs, door lock status lights, and window switch feedback in distributed BCM nodes. IC Role / Device Role / Timing Role: Robust serial-input shift register with AEC-Q100 qualification and Ioff - ensures safe operation during battery voltage transients. Use Value: Provides fault-tolerant output expansion immune to brownouts and load dump events common in 12 V vehicle electrical systems. | Use Scenario: Adding GPIOs for touch panel backlight control, button illumination, and audio status LEDs in head unit designs. IC Role / Device Role / Timing Role: Cascadable 3-state output register allowing dynamic reconfiguration of shared I/O buses across multiple subsystems. Use Value: Supports flexible hardware reuse across vehicle trim levels - same PCB layout accommodates base and premium infotainment variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shift register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC595QPWRQ1 | Higher VCC max (6 V), slower propagation (18 ns @ 3.3 V), no Ioff, non-wettable TSSOP | Limited to ≤85°C ambient; unsuitable for under-hood use or partial-power-down systems | Choose only if legacy HC logic compatibility is required and temperature range is constrained to cabin-only locations. |
| MC74LVX164DR2G | 8-bit shift register only - no storage register or 3-state outputs; SOIC-14 package | Requires external latch and buffer for parallel output; no OE control or cascade QH′ | Select when minimal footprint and lowest cost are prioritized over output flexibility and automotive qualification. |
Compared with SN74HC595QPWRQ1 and MC74LVX164DR2G, the SN74LV595AQPWRQ1 uniquely combines AEC-Q100 Grade 1 operation, integrated storage+3-state outputs, wettable-flank packaging, and Ioff - making it the only option qualified for safety-critical, thermally demanding, and modular automotive subsystems.
Availability
SN74LV595AQPWRQ1 is available at Aetrix Electronics and suitable for automotive body control, instrument cluster display, and infotainment I/O expansion requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV595AQPWRQ1 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 automotive ICs, with decades of experience delivering AEC-Q100-qualified components for safety-critical vehicle systems.
The SN74LV595AQPWRQ1 belongs to TI's LV-A family of low-voltage, automotive-qualified logic devices designed specifically for robust GPIO expansion in harsh-temperature, high-reliability automotive electronics.
FAQ
What is the maximum clock frequency supported by SN74LV595AQPWRQ1 at 3.3 V?
The SN74LV595AQPWRQ1 supports a maximum clock frequency of 105 MHz for SRCLK and RCLK at VCC = 3.3 V and TA = 25°C, with guaranteed minimum fmax of 50 MHz across the full –40°C to +125°C operating range. This allows high-speed LED refresh rates and responsive I/O updates in real-time automotive applications.
Does SN74LV595AQPWRQ1 require external pull-up resistors on its control inputs?
Yes - to ensure defined logic states during power-up and prevent floating inputs, OE, SRCLR, SRCLK, and RCLK should each be pulled to VCC or GND via 10-kΩ resistors. The SN74LV595AQPWRQ1 has no internal weak pull-ups; uncontrolled inputs risk metastability, excessive current draw, or unintended output behavior.
Can SN74LV595AQPWRQ1 drive LEDs directly without current-limiting resistors?
No - SN74LV595AQPWRQ1 outputs must always be used with external current-limiting resistors. While its ±8 mA drive capability at 3.3 V is sufficient for typical indicator LEDs, omitting resistors risks exceeding absolute maximum output current (±35 mA) and causing permanent damage or thermal shutdown.
How does the QH′ pin function in SN74LV595AQPWRQ1 cascading configurations?
The QH′ pin provides the inverted value of QH and serves as the serial output for daisy-chaining. When cascading multiple SN74LV595AQPWRQ1 devices, QH′ of the first stage connects directly to SER of the second stage - eliminating the need for external inverters and preserving signal integrity across long traces in automotive harnesses.
Is SN74LV595AQPWRQ1 pin-compatible with standard SN74LV595A commercial variants?
Yes - SN74LV595AQPWRQ1 shares identical pinout, electrical behavior, and functional block diagram with the commercial SN74LV595APWR, differing only in AEC-Q100 qualification, extended temperature rating (–40°C to +125°C), and wettable-flank TSSOP packaging. No PCB redesign is needed when upgrading from commercial to automotive grade.
SN74LV595AQPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Shift Register
- Output Type:
- Tri-State
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Function:
- Serial to Parallel, Serial
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
SN74LV595AQPWRQ1 FAQ
1.How can I place an order for SN74LV595AQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV595AQPWRQ1 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 SN74LV595AQPWRQ1 reliable?
The price and inventory of SN74LV595AQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV595AQPWRQ1 is usually 5 days.
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SN74LV595AQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV595AQPWRQ1 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 SN74LV595AQPWRQ1?
For technical support, including SN74LV595AQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV595AQPWRQ1 requirements.
6.How does Aetrix verify that SN74LV595AQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74LV595AQPWRQ1 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 SN74LV595AQPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74LV595AQPWRQ1?
All SN74LV595AQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV595AQPWRQ1, 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 SN74LV595AQPWRQ1 part is unused and in its original packaging.
Return procedure for SN74LV595AQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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