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CD74HC373E TI Latches | 20-PDIP | 8-Bit D-Type, 3-State Output
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Product Overview
The CD74HC373E from Texas Instruments is a high-speed CMOS octal transparent latch with 3-state outputs. It is designed for use in memory address latching, data storage, and bus driving applications. The device features eight D-type latches with a common latch enable (LE) and output enable (OE) control. When LE is high, the Q outputs follow the D inputs; when LE is low, the outputs are latched. The OE input controls the 3-state outputs, allowing connection to a common bus. The CD74HC373E is packaged in a 20-pin PDIP, making it suitable for through-hole PCB assembly.
Detailed Technical Specifications
| Parameter | Value |
|---|---|
| Supply Voltage (VCC) | 2V to 6V |
| Input Voltage (VI) | 0V to VCC |
| Output Voltage (VO) | 0V to VCC |
| High-Level Input Voltage (VIH) | 3.15V min (at VCC=4.5V) |
| Low-Level Input Voltage (VIL) | 1.35V max (at VCC=4.5V) |
| High-Level Output Current (IOH) | -4mA (at VCC=4.5V) |
| Low-Level Output Current (IOL) | 4mA (at VCC=4.5V) |
| Propagation Delay (tpd) | 15ns typ (at VCC=4.5V, CL=50pF) |
| Operating Temperature | -55°C to +125°C |
| Package | 20-PDIP |
Key Features
- 8-bit transparent latch with 3-state outputs
- Wide operating voltage range: 2V to 6V
- High noise immunity: typical VNIH = VNIL = 28% VCC
- Low power consumption: 80µA max ICC
- Balanced propagation delays: tPLH = tPHL
- Inputs accept voltages up to VCC
- Outputs can drive up to 10 LSTTL loads
- Standard 20-pin PDIP package
Target Applications
The CD74HC373E is ideal for use in a variety of digital systems, including:
- Memory address latching in microcontrollers and DSPs (e.g., TI TMS320F28335)
- Data storage and transfer in industrial PLCs (e.g., Siemens S7-1200)
- Bus interface in 5G base station control boards (e.g., Nokia AirScale)
- Display data latching in automotive dashboards (e.g., Tesla Model 3 instrument cluster)
- General-purpose I/O expansion in embedded systems (e.g., Raspberry Pi GPIO)
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- 24/7 Global Customer Support: Professional team providing instant quotes and technical support worldwide.
- In-stock Inventory, Same-day Shipping: We maintain localized stock; orders confirmed before 4 PM are shipped the same day.
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- Escrow Secured Transactions: We support Escrow.com for secure transactions, ensuring peace of mind for batch orders.
- BOM Kitting & Sampling Services: Specialized sourcing for testing samples and urgent shortage components.
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Jasin Chip guarantees that all delivered products are 100% original factory stock with full quality assurance and traceability.
- 100% Original & Authentic: All components are guaranteed to be authentic with strict quality control.
- RoHS Compliant: All electronic components comply with international environmental and safety standards.
- Original Factory Packaging: We maintain original factory packaging and seals to ensure ESD protection and physical integrity.
產品概述
CD74HC373E 是德州儀器 (TI) 生產的高速 CMOS 八路透明鎖存器，具有三態輸出。它適用於存儲器地址鎖存、數據存儲和總線驅動等應用。該器件包含八個 D 型鎖存器，帶有公共鎖存使能 (LE) 和輸出使能 (OE) 控制。當 LE 為高電平時，Q 輸出跟隨 D 輸入；當 LE 為低電平時，輸出被鎖存。OE 輸入控制三態輸出，允許連接到公共總線。CD74HC373E 採用 20 引腳 PDIP 封裝，適合通孔 PCB 組裝。
詳細技術參數
| 參數 | 數值 |
|---|---|
| 電源電壓 (VCC) | 2V 至 6V |
| 輸入電壓 (VI) | 0V 至 VCC |
| 輸出電壓 (VO) | 0V 至 VCC |
| 高電平輸入電壓 (VIH) | 最小值 3.15V (VCC=4.5V 時) |
| 低電平輸入電壓 (VIL) | 最大值 1.35V (VCC=4.5V 時) |
| 高電平輸出電流 (IOH) | -4mA (VCC=4.5V 時) |
| 低電平輸出電流 (IOL) | 4mA (VCC=4.5V 時) |
| 傳播延遲 (tpd) | 典型值 15ns (VCC=4.5V, CL=50pF) |
| 工作溫度 | -55°C 至 +125°C |
| 封裝 | 20-PDIP |
核心特性
- 8 位透明鎖存器，帶三態輸出
- 寬工作電壓範圍：2V 至 6V
- 高抗噪性：典型 VNIH = VNIL = 28% VCC
- 低功耗：最大 ICC 80µA
- 平衡傳播延遲：tPLH = tPHL
- 輸入可接受高達 VCC 的電壓
- 輸出可驅動多達 10 個 LSTTL 負載
- 標準 20 引腳 PDIP 封裝
典型應用場景
CD74HC373E 適用於多種數字系統，包括：
- 微控制器和 DSP 中的存儲器地址鎖存（例如 TI TMS320F28335）
- 工業 PLC 中的數據存儲和傳輸（例如西門子 S7-1200）
- 5G 基站控制板中的總線接口（例如諾基亞 AirScale）
- 汽車儀表盤中的顯示數據鎖存（例如特斯拉 Model 3 儀表組）
- 嵌入式系統中的通用 I/O 擴展（例如樹莓派 GPIO）
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