
FLYiNG 零件編號 | IC74HC244D653NEXPERIA |
FLYiNG 庫存現貨 | 電洽/Contact |
製造商 | NEXPERIA |
製造商零件編號 | 74HC244D,653 |
說明 | 74HC244D,653 SO-20 NXP |
無鉛狀態 / RoHS 指令狀態 | RoHS |

積體電路類型 | CMOS IC |
輸入行數 | 8 Input |
輸出行數 | 8 Output |
極性 | Non-Inverting |
輸出電流 | -7.8mA~7.8mA |
靜止電流 | 8 uA |
電源電壓 | 2~6 V |
工作溫度 | -40~125°C |
封裝/外殼 | SO-20 |
安裝類型 | SMD 表面黏著式 |
標準包裝數量 | 2000/REEL |

文件:74HC244; 74HCT244
74HC244; 74HCT244
Octal buffer/line driver; 3-state
General description
The 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Features and benefits
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74HC244; 74HCT244
Octal buffer/line driver; 3-state
General description
The 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes that enable the use of current limiting resistors to interface inputs to voltages in excess of VCC.
- Wide supply voltage range from 2.0 V to 6.0 V
- CMOS low power dissipation
- High noise immunity
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
- Input levels:
- For 74HC244: CMOS level
- For 74HCT244: TTL level
- Octal bus interface
- JESD8C (2.7 V to 3.6 V)
- JESD7A (2.0 V to 6.0 V)
- ESD protection:
- HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
- CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
- Multiple package options
- Specified from -40 °C to +85 °C and -40 °C to +125 °C
74HC244; 74HCT244
八位緩衝器/線驅動器(3態輸出)
一般描述
74HC244 和 74HCT244 是具有 3 态輸出的 8 位緩衝器/線驅動器。該元件可作為兩個 4 位緩衝器或一個 8 位緩衝器使用。其特點是具有兩個獨立的輸出使能端(1OE 和 2OE),每個使能端可控制 4 個 3 態輸出。當 nOE 為高電位時,對應的輸出進入高阻抗(OFF)狀態。輸入端內建箝位二極體,可透過限流電阻與高於 VCC 的電壓相連接。
特點與優勢
- 寬電源電壓範圍:2.0V 至 6.0V
- 低功耗 CMOS 設計
- 高抗噪能力
- Latch-up 抑制能力超過 100mA(符合 JESD 78 Class II Level B)
- 輸入電平標準:
- 74HC244:CMOS 電平
- 74HCT244:TTL 電平
- 八位匯流排接口
- 符合 JEDEC 標準:
- JESD8C(2.7V 至 3.6V)
- JESD7A(2.0V 至 6.0V)
- ESD 保護等級:
- HBM(人體模型):符合 ANSI/ESDA/JEDEC JS-001 Class 2,超過 2000V
- CDM(充電裝置模型):符合 ANSI/ESDA/JEDEC JS-002 Class C3,超過 1000V
- 多種封裝選擇
- 工作溫度範圍:-40°C 至 +85°C,部分型號可達 -40°C 至 +125°C