74HC244; 74HCT244
Octal buffer/line driver; 3-state
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
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
Non-inverting 3-state outputs
Complies with JEDEC standards:
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
參數(shù)類型
| 型號 | VCC (V) | Logic switching levels | Output drive capability (mA) | fmax (MHz) | Nr of bits | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Rth(j-c) (K/W) | Package name | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 74HC244BQ | 2.0?-?6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | 78 | 50 | DHVQFN20 | |
| 74HC244D | 2.0?-?6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | 85 | 27 | 61 | SO20 |
| 74HC244PW | 2.0?-?6.0 | CMOS | ± 7.8 | 36 | 8 | low | -40~125 | 100 | 4.6 | 44.9 | TSSOP20 |
| 74HCT244BQ | 4.5?-?5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | 78 | 50 | DHVQFN20 | |
| 74HCT244D | 4.5?-?5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | 85 | 27 | 61 | SO20 |
| 74HCT244PW | 4.5?-?5.5 | TTL | ± 6 | 36 | 8 | low | -40~125 | 100 | 4.6 | 44.9 | TSSOP20 |
封裝
| 型號 | 可訂購的器件編號，（訂購碼(12NC)） | 狀態(tài) | 標(biāo)示 | 封裝 | 外形圖 | 回流焊/波峰焊 | 包裝 |
|---|---|---|---|---|---|---|---|
| 74HC244BQ | 74HC244BQ,115 (935273678115) |
Active | HC244 |
DHVQFN20 (SOT764-1) |
SOT764-1 | SOT764-1_115 | |
| 74HC244D | 74HC244D,653 (933713420653) |
Active | 74HC244D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
暫無信息 |
| 74HC244PW | 74HC244PW,118 (935174640118) |
Active | HC244 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT360-1_118 |
| 74HCT244BQ | 74HCT244BQ,115 (935273729115) |
Active | HCT244 |
DHVQFN20 (SOT764-1) |
SOT764-1 | SOT764-1_115 | |
| 74HCT244D | 74HCT244D,653 (933713430653) |
Active | 74HCT244D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
暫無信息 |
| 74HCT244PW | 74HCT244PW,118 (935165220118) |
Active | HCT244 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
SOT360-1_118 |
下表中的所有產(chǎn)品型號均已停產(chǎn) 。
| 型號 | 可訂購的器件編號，（訂購碼(12NC)） | 狀態(tài) | 標(biāo)示 | 封裝 | 外形圖 | 回流焊/波峰焊 | 包裝 |
|---|---|---|---|---|---|---|---|
| 74HC244D | 74HC244D,652 (933713420652) |
Withdrawn / End-of-life | 74HC244D |
SO20 (SOT163-1) |
SOT163-1 |
WAVE_BG-BD-1
|
暫無信息 |
| 74HC244DB | 74HC244DB,112 (935166890112) |
Obsolete | no package information | ||||
| 74HC244DB,118 (935166890118) |
Obsolete | ||||||
| 74HC244PW | 74HC244PW,112 (935174640112) |
Withdrawn / End-of-life | HC244 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
暫無信息 |
| 74HCT244DB | 74HCT244DB,112 (935166880112) |
Obsolete | HCT244 |
SSOP20 (SOT339-1) |
SOT339-1 |
SSOP-TSSOP-VSO-WAVE
|
暫無信息 |
| 74HCT244DB,118 (935166880118) |
Obsolete | HCT244 | SOT339-1_118 | ||||
| 74HCT244PW | 74HCT244PW,112 (935165220112) |
Withdrawn / End-of-life | HCT244 |
TSSOP20 (SOT360-1) |
SOT360-1 |
SSOP-TSSOP-VSO-WAVE
|
暫無信息 |
環(huán)境信息
| 型號 | 可訂購的器件編號 | 化學(xué)成分 | RoHS | RHF指示符 |
|---|---|---|---|---|
| 74HC244BQ | 74HC244BQ,115 | 74HC244BQ |
|
|
| 74HC244D | 74HC244D,653 | 74HC244D |
|
|
| 74HC244PW | 74HC244PW,118 | 74HC244PW |
|
|
| 74HCT244BQ | 74HCT244BQ,115 | 74HCT244BQ |
|
|
| 74HCT244D | 74HCT244D,653 | 74HCT244D |
|
|
| 74HCT244PW | 74HCT244PW,118 | 74HCT244PW |
|
|
下表中的所有產(chǎn)品型號均已停產(chǎn) 。
| 型號 | 可訂購的器件編號 | 化學(xué)成分 | RoHS | RHF指示符 |
|---|---|---|---|---|
| 74HC244D | 74HC244D,652 | 74HC244D |
|
|
| 74HC244DB | 74HC244DB,112 | 74HC244DB |
|
|
| 74HC244DB | 74HC244DB,118 | 74HC244DB |
|
|
| 74HC244PW | 74HC244PW,112 | 74HC244PW |
|
|
| 74HCT244DB | 74HCT244DB,112 | 74HCT244DB |
|
|
| 74HCT244DB | 74HCT244DB,118 | 74HCT244DB |
|
|
| 74HCT244PW | 74HCT244PW,112 | 74HCT244PW |
|
|
文檔 (21)
| 文件名稱 | 標(biāo)題 | 類型 | 日期 |
|---|---|---|---|
| 74HC_HCT244 | Octal buffer/line driver; 3-state | Data sheet | 2024-08-05 |
| AN11044 | Pin FMEA 74HC/74HCT family | Application note | 2019-01-09 |
| AN263 | Power considerations when using CMOS and BiCMOS logic devices | Application note | 2023-02-07 |
| AN90063 | Questions about package outline drawings | Application note | 2025-10-22 |
| mna874 | Block diagram: 74AHC244BQ, 74AHC244D, 74AHC244PW, 74AHCT244BQ, 74AHCT244D, 74AHCT244PW, 74HC244BQ, 74HC244D, 74HC244DB, 74HC244N, 74HC244PW, 74HCT244BQ, 74HCT244D, 74HCT244DB, 74HCT244N, 74HCT244PW | Block diagram | 2009-11-04 |
| mna875 | Block diagram: 74ABT2244D, 74ABT2244DB, 74ABT2244N, 74ABT2244PW, 74ABT244D, 74ABT244DB, 74ABT244N, 74ABT244PW, 74LVC244ABQ, 74LVC244ABX, 74LVC244AD, 74LVC244ADB, 74LVC244APW, 74LVCH244ABQ, 74LVCH244ABX, 74LVCH244AD, 74LVCH244ADB, 74LVCH244APW, 74LVCH245ABX, 74HC244BQ, 74HC244D, 74HC244DB, 74HC244N, 74HC244PW, 74HCT244BQ, 74HCT244D, 74HCT244DB, 74HCT244N, 74HCT244PW | Block diagram | 2009-11-03 |
| SOT764-1 | 3D model for products with SOT764-1 package | Design support | 2019-10-03 |
| SOT163-1 | 3D model for products with SOT163-1 package | Design support | 2020-01-22 |
| SOT360-1 | 3D model for products with SOT360-1 package | Design support | 2020-01-22 |
| Nexperia_package_poster | Nexperia package poster | Leaflet | 2020-05-15 |
| DHVQFN20_SOT764-1_mk | plastic, dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 2.5 mm x 4.5 mm x 0.85 mm body | Marcom graphics | 2017-01-28 |
| TSSOP20_SOT360-1_mk | plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm body | Marcom graphics | 2017-01-28 |
| D12_PC_sch_ver2_0 | D12_PC_sch_ver2_0 | Other type | 2023-09-12 |
| SOT764-1 | plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 4.5 mm x 2.5 mm x 1 mm body | Package information | 2022-06-21 |
| SOT163-1 | plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm body | Package information | 2024-11-15 |
| SOT360-1 | plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.2 mm body | Package information | 2024-11-15 |
| SOT339-1 | plastic, shrink small outline package; 20 leads; 0.65 mm pitch; 7.2 mm x 5.3 mm x 2 mm body | Package information | 2020-04-21 |
| hc | HC/HCT Spice model | SPICE model | 2022-02-17 |
| HCT_USER_GUIDE | HC/T User Guide | User manual | 1997-10-31 |
| WAVE_BG-BD-1 | Wave soldering profile | Wave soldering | 2021-09-08 |
| SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
支持
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模型
| 文件名稱 | 標(biāo)題 | 類型 | 日期 |
|---|---|---|---|
| SOT764-1 | 3D model for products with SOT764-1 package | Design support | 2019-10-03 |
| SOT163-1 | 3D model for products with SOT163-1 package | Design support | 2020-01-22 |
| SOT360-1 | 3D model for products with SOT360-1 package | Design support | 2020-01-22 |
| hc | HC/HCT Spice model | SPICE model | 2022-02-17 |
Ordering, pricing & availability
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