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Product Overview
The CD74HCT299M is a high-speed CMOS 8-bit universal shift/storage register from Texas Instruments, featuring tri-state outputs. It operates with a wide supply voltage range of 4.5V to 5.5V, making it compatible with TTL logic levels. The device is housed in a 20-pin SOIC package, ideal for space-constrained applications. It supports parallel load, serial shift left/right, and hold operations, controlled by mode select inputs. The tri-state outputs allow bus-oriented applications, and the register can be cascaded for larger bit widths.
Detailed Technical Specifications
| Parameter |
Value |
| Supply Voltage (VCC) |
4.5V to 5.5V |
| Input Voltage (VI) |
0V to VCC |
| Output Voltage (VO) |
0V to VCC |
| High-Level Input Voltage (VIH) |
2V min |
| Low-Level Input Voltage (VIL) |
0.8V max |
| High-Level Output Current (IOH) |
-4 mA |
| Low-Level Output Current (IOL) |
4 mA |
| Propagation Delay (tpd) |
30 ns typ at 5V, 15 pF |
| Input Capacitance (Ci) |
10 pF typ |
| Operating Temperature |
-55°C to +125°C |
| Package |
20-SOIC |
Key Features
- 8-bit universal shift/storage register with tri-state outputs
- High-speed CMOS technology: typical shift frequency of 30 MHz
- Wide operating voltage range: 4.5V to 5.5V
- TTL input compatibility: VIH = 2V, VIL = 0.8V
- Tri-state outputs for bus-oriented systems
- Asynchronous master reset
- Can be cascaded for n-bit word length
- Low power consumption: ICC = 80 µA max
- ESD protection exceeds 2000V per MIL-STD-883
Target Applications
- 5G base station control logic: used for serial-to-parallel conversion in beamforming control
- Automotive dashboard display: data latching for segment drivers
- Industrial PLC I/O expansion: shift register for input/output expansion
- Consumer electronics: remote control receiver data storage
- Medical devices: patient monitoring system data acquisition
Global Supply Chain & Wholesale Solutions
At Jasin Chip, we provide professional supply chain and wholesale solutions for
CD74HCT299M. Our core advantages include:
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24/7 Global Customer Support: Professional team providing instant
quotes and technical support worldwide.
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In-stock Inventory, Same-day Shipping: We maintain localized stock;
orders confirmed before 4 PM are shipped the same day.
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Shenzhen with support for HK bank transfers and multi-currency.
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Escrow Secured Transactions: We support Escrow.com for secure
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BOM Kitting & Sampling Services: Specialized sourcing for
testing samples and urgent shortage components.
Quality Assurance & Compliance
Jasin Chip guarantees that all delivered products are 100% original factory stock
with full quality assurance and traceability.
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100% Original & Authentic: All components are guaranteed to
be authentic with strict quality control.
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RoHS Compliant: All electronic components comply with international
environmental and safety standards.
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Original Factory Packaging: We maintain original factory packaging
and seals to ensure ESD protection and physical integrity.
產品概述
CD74HCT299M 是德州儀器的一款高速 CMOS 8 位通用移位/存儲寄存器,具有三態輸出。它支持 4.5V 至 5.5V 的寬電源電壓範圍,與 TTL 邏輯電平兼容。器件採用 20 引腳 SOIC 封裝,適合空間受限的應用。它支持並行加載、串行左/右移位和保持操作,由模式選擇輸入控制。三態輸出允許總線導向應用,並且寄存器可以級聯以實現更大的位寬。
詳細技術參數
| 參數 |
數值 |
| 電源電壓 (VCC) |
4.5V 至 5.5V |
| 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 2V |
| 低電平輸入電壓 (VIL) |
最大 0.8V |
| 高電平輸出電流 (IOH) |
-4 mA |
| 低電平輸出電流 (IOL) |
4 mA |
| 傳播延遲 (tpd) |
典型 30 ns @ 5V, 15 pF |
| 輸入電容 (Ci) |
典型 10 pF |
| 工作溫度 |
-55°C 至 +125°C |
| 封裝 |
20-SOIC |
核心特性
- 8 位通用移位/存儲寄存器,帶三態輸出
- 高速 CMOS 技術:典型移位頻率 30 MHz
- 寬工作電壓範圍:4.5V 至 5.5V
- TTL 輸入兼容:VIH = 2V, VIL = 0.8V
- 三態輸出,適用於總線系統
- 異步主復位
- 可級聯以實現 n 位字長
- 低功耗:ICC 最大 80 µA
- ESD 保護超過 2000V(符合 MIL-STD-883)
典型應用場景
- 5G 基站控制邏輯:用於波束成形控制的串並轉換
- 汽車儀表盤顯示:數據鎖存用於段驅動器
- 工業 PLC I/O 擴展:移位寄存器用於輸入/輸出擴展
- 消費電子:遙控接收器數據存儲
- 醫療設備:病人監護系統數據採集
環球供應鏈與批發合作夥伴方案
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