ULN2003ANE4 - 7-Ch NPN Darlington 500mA 16-PDIP | TI
料号： ULN2003ANE4 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.27 | $0.27 |
| 10 | $0.22 | $2.20 |
| 100 | $0.18 | $18.00 |
| 500 | $0.16 | $80.00 |
| 1,000 | $0.14 | $140.00 |
| 3,000 | $0.12 | $360.00 |
ULN2003ANE4 概述
A Darlington transistor array is a monolithic IC that integrates multiple Darlington-pair drivers in a single package, allowing microcontrollers and low-power logic to switch high-current loads such as relays, solenoids, lamps, and stepper motor windings. Each Darlington pair multiplies the input current by the product of the two transistor betas, producing very high current gain (typically 10,000+) and enabling a logic-level signal to drive loads drawing hundreds of milliamps. The ULN2003 family sits at the low-side (open-collector) side of an H-bridge or relay driver topology, and is widely recognized as the de-facto standard driver for Arduino relay boards, 28BYJ-48 stepper motors, and unipolar stepper motor control.
Key features include 7 matched channels with 500mA per-channel continuous rating, integrated 2.7kOhm base resistors for direct 5V/3.3V logic interface, built-in freewheeling diodes for inductive loads, 50V minimum VCEO breakdown, and a logic-0 input current of approximately 0.93mA at 3.85V. The 16-pin PDIP package is well-suited for breadboarding and through-hole prototyping, and the array can be paralleled (channels in parallel) for higher current applications.
Typical applications include relay drivers, stepper motor drivers (especially unipolar and 28BYJ-48 gear motors), solenoid and valve drivers, LED matrix row/column drivers, logic-level shifters for power devices, and lamp/display drivers. The wide 50V breakdown supports driving 24V industrial relays and 12V automotive lamps directly from 3.3V microcontroller GPIO pins.
When designing with this part, ensure PCB trace widths and copper pours can handle 500mA continuous per channel; derate to 350mA if all seven channels conduct simultaneously. The integrated clamp diodes share a common cathode tied to a dedicated pin (pin 9, COM) which must either be tied to V+ for freewheeling or left open if the load has its own flyback path.
直接替换替代料： ULN2003ANE4 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ULN2003ANE4 （相同外形与封装尺寸） ——差异在于 Package, Transistor Type.
快速对比工具——选择替代料号进行并排对比：
ULN2003AN
✅ 直接替换✓ 有现货
$0.31 / 个
查看数据手册 →ULN2003ADE4
✅ 直接替换📋 参考替代料（不在目录中）
ULN2003APWR
✅ 直接替换📋 参考替代料（不在目录中）
ULN2003D1013TR
✅ 直接替换📋 参考替代料（不在目录中）
ULN2003AFWG
✅ 直接替换📋 参考替代料（不在目录中）
ULN2003LV-Q1
✅ 直接替换📋 参考替代料（不在目录中）
ULN2003ANE4 最大额定值与电气特性
| 晶体管类型 | 7 NPN Darlington Pairs |
| Configuration | Array (7 channels, common emitter) |
| Collector-Emitter Voltage (VCEO max) | 50 V |
| Continuous Collector Current (per channel) | 500 mA |
| DC Current Gain (hFE) | 1000 (min), 5000 (typical) |
| Input Compatibility | CMOS, TTL, 3.3V/5V logic |
| Input Base Resistor (integrated) | 2.7 kOhm |
| Clamp Diode Type | Common-cathode flyback diodes |
| Collector-Emitter Saturation Voltage (VCEsat) | 0.95 V typical at IC=100mA; 1.35 V at 200mA; 1.7 V at 350mA |
| 封装 | 16-PDIP (N, 0.300 inch / 7.62mm width) |
| 安装类型 | Through Hole |
| 引脚数量 | 16 |
| Lead Free / RoHS Status | RoHS Compliant (E4 suffix = Pb-free, NiPdAu lead finish) |
| MSL 等级 | 1 (unlimited, through-hole) |
| Channel-to-Channel Matching | Matched VBE and hFE |
ULN2003ANE4 引脚配置
| 引脚 1 | IN1 — Channel 1 input (logic level, base of Darlington via 2.7 kOhm) |
| 引脚 2 | IN2 — Channel 2 input |
| 引脚 3 | IN3 — Channel 3 input |
| 引脚 4 | IN4 — Channel 4 input |
| 引脚 5 | IN5 — Channel 5 input |
| 引脚 6 | IN6 — Channel 6 input |
| 引脚 7 | IN7 — Channel 7 input |
| 引脚 8 | GND — Ground (emitters of all Darlington pairs) |
| 引脚 9 | COM — Common cathode of clamp diodes - connect to load supply for flyback protection |
| 引脚 10 | OUT7 — Channel 7 open-collector output |
| 引脚 11 | OUT6 — Channel 6 open-collector output |
| 引脚 12 | OUT5 — Channel 5 open-collector output |
| 引脚 13 | OUT4 — Channel 4 open-collector output |
| 引脚 14 | OUT3 — Channel 3 open-collector output |
| 引脚 15 | OUT2 — Channel 2 open-collector output |
| 引脚 16 | OUT1 — Channel 1 open-collector output |
典型应用
ULN2003ANE4 适用于 7 应用s: Relay Driver Boards (5V/12V/24V SPDT), 28BYJ-48 Stepper Motor Driver (Arduino Reference), Solenoid and Valve Driver, LED Matrix Row/Column Driver, Logic-Level Shifter / CMOS-to-Power Interface, Lamp / Display / Incandescent Driver, Printer / Appliance Stepper Driver Boards.
Relay Driver Boards (5V/12V/24V SPDT)
The ULN2003ANE4 is the workhorse driver for 7-channel relay arrays used with 3.3V MCUs like STM32BluePill, Raspberry Pi, and Arduino. Each Darlington channel sinks up to 500mA continuous from the relay coil to ground; the integrated 2.7 kOhm base resistors allow direct GPIO connection without external components, and the common-cathode clamp diodes handle the relay coil's inductive flyback when the channel switches off. Place each channel's flyback cathode COM pin at the relay supply rail (+5V or +24V), and the open-collector outputs to the high-side of each coil - this topology handles industrial 24V PLC relay switching at currents up to 350mA per channel while keeping MCU GPIO fully isolated from the coil current. Per TI datasheet, the ULN2003 family has been the de-facto 7-channel low-side driver for decades.
推荐
28BYJ-48 Stepper Motor Driver (Arduino Reference)
The 28BYJ-48 5V unipolar stepper requires 4 phases of approximately 240mA peak each, making the ULN2003ANE4 an ideal driver with a ~2x current margin. Connect phases A through D to OUT1-4, MCU digital outputs to IN1-4, and the COM pin to the +5V motor supply - the integrated flyback diodes then absorb coil flyback energy safely. The 7 remaining channels (OUT5-7 plus 3 inputs) can be repurposed in this application, or the same board can drive a stepper plus indicator LEDs. Per Arduino community references using the Stepper.h library, 28BYJ-48 + ULN2003 is the standard 5V stepper reference configuration, achieving 2048-step half-stepping with 4-phase commutation at safe current limits under 350mA continuous per channel.
推荐
Solenoid and Valve Driver
Industrial 12V and 24V solenoids, valve actuators, and small DC loads draw 200-500mA each, within the ULN2003ANE4's 500mA continuous per-channel rating. Each channel's Darlington pair maintains VCEsat approximately 1.35V at 200mA - this represents 4.5% loss on a 24V supply which is acceptable for most non-precision pneumatic and hydraulic valve control applications. The ULN2003ANE4 handles inductive kickback internally, simplifying the BOM for industrial cabinet controllers. Per the TI datasheet, ULN2003 logic inputs accept 3.3V CMOS directly, so an ESP32 or Raspberry Pi industrial HAT can drive these valves through a 16-PDIP interface PCB.
推荐
LED Matrix Row/Column Driver
The ULN2003ANE4's open-collector Darlington outputs are widely used as the low-side row driver for multiplexed LED matrices, where each row may sink up to 500mA continuous when multiple LED columns are turned on simultaneously. Combined with a high-side source driver (like UDN2981) the array forms an H-bridge-less display interface for 7-segment hex digits or 8x8 dot-matrix modules. Typical multiplexing at 1/8 duty cycle allows individual LED currents up to approximately 1A peak per channel, well above the 500mA continuous (since average is 125mA per channel at 1/8 duty). According to TI datasheet recommendations, the integrated clamp diodes also protect against back-EMF in matrix scanning systems with inductive noise coupling.
推荐
Logic-Level Shifter / CMOS-to-Power Interface
The ULN2003ANE4 can shift 3.3V or 5V CMOS logic levels to interface with 12V or 24V powered actuator loads, functioning as a level shifter through its open-collector output structure. The 50V collector breakdown voltage supports loads up to 50V, enabling 36V industrial actuator control from a low-voltage MCU. Per TI datasheet specifications, the typical input-to-output propagation delay is 250 ns (typical), enabling PWM-driven dimming and motor speed control at up to 4 kHz. Connect OUT pins to the load high side and pull the load down via the ULN2003 open collector when the input is logic high.
推荐
Lamp / Display / Incandescent Driver
Older industrial control systems use the ULN2003ANE4 to drive incandescent indicator lamps, 7-segment displays, and 28V aircraft cockpit lighting at up to 350mA per channel continuous (derated from 500mA to keep total package power dissipation under 1W per channel). The integrated clamp diodes handle back-EMF from tungsten filament inrush when lamps are cold. Per TI datasheet specifications, the 50V breakdown also supports 28V aircraft lamp buses used in avionics retrofit designs. The 16-PDIP package's through-hole pins are particularly suited for rugged industrial-rated lamp fixture controllers where vibration could dislodge an SMD part.
推荐
Printer / Appliance Stepper Driver Boards
The ULN2003ANE4 is found in legacy thermal printer carriage steppers, fax machine paper feeders, and small appliance control boards where a 4- or 5-phase unipolar stepping motor draws 200-300mA per phase at 12V or 24V. Per TI datasheet documentation, ULN2003-based motor drivers have shipped in tens of millions of HP/Canon/Epson printers - its 50V/500mA rating handles the 24V phase voltages typical of office equipment reliably. For new designs, modern designers may prefer lower-power alternatives, but the ULN2003ANE4 remains the dominant drop-in choice for repairing legacy printer and copier control boards. The 16-PDIP package is easy to hand-replace in service shops.
推荐
推荐产品汇总
工程参考数据： ULN2003ANE4 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ULN2003AN | ULN2003APWR | ULN2003D1013TR | ULN2003AFWG |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | STMicroelectronics | onsemi |
| Package | 16-PDIP (N) | 16-PDIP (N) - same | 16-TSSOP | 16-SOIC (SO-16) | 16-SOIC |
| Channels | 7 NPN Darlington | 7 NPN Darlington | 7 NPN Darlington | 7 NPN Darlington | 7 NPN Darlington |
| VCEO Maximum | 50 V | 50 V | 50 V | 50 V | 50 V |
| Continuous Collector Current | 500 mA | 500 mA | 500 mA | 500 mA | 500 mA |
| Integrated Base Resistor | 2.7 kOhm | 2.7 kOhm | 2.7 kOhm | 2.7 kOhm | 2.7 kOhm |
| Logic Compatibility | 5V CMOS/TTL (3.85V input) | 5V CMOS/TTL (3.85V input) | 5V CMOS/TTL (3.85V input) | 5V CMOS/TTL | 5V CMOS/TTL |
| Clamp Diode | Yes (common cathode) | Yes (common cathode) | Yes (common cathode) | Yes | Yes |
| Lead-Free / RoHS | Yes (Pb-free E4 finish) | No (contains lead) | Yes (Pb-free) | Yes | Yes |
| Unit Price (approx, qty 1) | $0.27 | $0.25 | $0.32 | $0.30 | $0.28 |
关键差异点
- Industry-standard 7-channel Darlington array with 30+ year design heritage （对比 TBD62003 (DMOS-based 7-channel driver))
- Pb-free E4 finish for RoHS/REACH compliance （对比 ULN2003AN (containing lead))
- Through-hole 16-PDIP package aids prototyping and repair （对比 ULN2003ADR (SOIC-16 surface-mount))
- 5V CMOS/TTL direct interface without external components （对比 Discrete Darlington pairs (e.g., 2N6426 x7))
设计说明
Estimated: at 500mA per channel and 1.7V VCEsat (data at 350mA), single-channel dissipation = 0.85W. With theta_JA = 70 C/W for 16-PDIP on a standard test board, junction temperature rises ~60C above 25C ambient. If all 7 channels conduct simultaneously (e.g., 7 relays), total package power = 5.95W and junction rises ~417C above ambient - clearly exceeding 150C Tj max. Derate to 350mA per channel when 5+ channels are active simultaneously, or 250mA when all 7 are active. For multi-channel high-current designs, split the load across multiple ULN2003 packages or use external heatsinks.
Place the COM pin (pin 9) directly at the relay/inductor positive supply rail - never leave it floating. The COM pin connects to the common cathode of the integrated flyback clamp diodes; if left unconnected, inductive kickback from relays will reverse-bias the substrate and may damage the array. For DIP packages, ensure PCB trace width handles 500mA continuous: at least 12-mil copper trace (1oz) or 2oz thicker copper for higher current. If driving loads >30V, add a 1k resistor in series with each input to limit input current during fault conditions.
Avoid using the ULN2003ANE4 as a high-side (source) driver - it is open-collector (low-side) only. To source current to a load, pair with a high-side driver like UDN2981. Also, the integrated base resistors of 2.7kOhm limit switching speed - typical propagation delay is 250 ns per channel, restricting PWM use to about 4 kHz maximum. For high-frequency PWM, use a discrete MOSFET driver or DMOS-based driver like TBD62003 (Rds_on=1.5Ohm typ). Finally, do not assume the channels are independently current-limited - 500mA is the absolute maximum with adequate PCB copper; thermal failure will occur before this limit in practice.
Group all GND pins together at the IC's pin 8 with a single thick ground trace to avoid ground-loop noise that can induce false triggering of Darlington inputs through the integrated base resistors. Keep input (IN1-IN7) traces away from output (OUT1-OUT7) traces to minimize capacitive coupling, especially in noisy relay applications. For 16-PDIP, ensure generous copper area around the package pins, especially pin 8 (GND) and pin 9 (COM) which carry the most current. If using this IC in a 5V-referenced design, place a 100nF ceramic bypass cap between COM (pin 9) and GND (pin 8) to suppress high-frequency inductive flyback spikes.
合规信息
E4 suffix denotes Pb-free NiPdAu lead finish - fully RoHS and REACH compliant per TI product page. Automotive qualified versions are separately designated ULN2003-Q1 or ULN2003LV-Q1; standard ULN2003ANE4 is not AEC-Q100 qualified. Operating temperature grade varies by datasheet (commercial 0-70C or industrial -20C to +85C); for high-temperature see ULQ2003A.
