×

Register once, drag and drop ECAD models into your CAD tool and speed up your design.

Click here for more information

74AHCT257D

Quad 2-input multiplexer; 3-state

The 74AHC257; 74AHCT257 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard No. 7-A.

The 74AHC257; 74AHCT257 has four identical 2-input multiplexers with 3-state outputs, which select 4 bits of data from two sources and are controlled by a common data select input (S). The data inputs from source 0 (1I0 to 4I0) are selected when input S is LOW and the data inputs from source 1 (1I1 to 4I1) are selected when input S is HIGH. Data appears at the outputs (1Y to 4Y) in true (non-inverting) form from the selected inputs. The 74AHC257; 74AHCT257 is the logic implementation of a 4-pole 2-position switch, where the position of the switch is determined by the logic levels applied to input S. The outputs are forced to a high-impedance OFF-state when OE is HIGH.

The logic equations for the outputs are:

  • 1Y = OE x (1I1 x S + 1I0 x S)
  • 2Y = OE x (2I1 x S + 2I0 x S)
  • 3Y = OE x (3I1 x S + 3I0 x S)
  • 4Y = OE x (4I1 x S + 4I0 x S)

The 74AHC257; 74AHCT257 is identical to the 74AHC258; 74AHCT258, but has non-inverting (true) outputs.

可订购部件

型号 可订购的器件编号 订购代码(12NC) 封装 从经销商处购买
74AHCT257D 74AHCT257D,118 935265469118 SOT109-1 订单产品

特性

  • Balanced propagation delays
  • All inputs have Schmitt-trigger actions
  • Non-inverting data path
  • Inputs accept voltages higher than VCC
  • Input levels:
    • For 74AHC257: CMOS level
    • For 74AHCT257: TTL level
  • ESD protection:
    • HBM EIA/JESD22-A114E exceeds 2000 V
    • MM EIA/JESD22-A115-A exceeds 200 V
    • CDM EIA/JESD22-C101C exceeds 1000 V
  • Multiple package options
  • Specified from -40 Cel to +85 Cel and from -40 Cel to +125 Cel

目标应用

参数类型

型号Product statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHCT257DProduction4.5 - 5.5TTL± 83.7low-40~125939.752SO16

Package

型号可订购的器件编号,(订购码(12NC))状态标示封装尺寸版本回流焊/波峰焊包装
74AHCT257D74AHCT257D,118
( 9352 654 69118 )
Active74AHCT257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1

下表中的版本已停产。参见表 停产信息 了解更多信息。

型号可订购的器件编号,(订购码(12NC))状态标示封装尺寸版本回流焊/波峰焊包装
74AHCT257D74AHCT257D,112
( 9352 654 69112 )
Withdrawn / End-of-life74AHCT257D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Bulk Pack

停产信息

型号可订购的器件编号Ordering code最后一次购买日期最后一次交货日期替代产品状态备注
74AHCT257D74AHCT257D,1129352654691122021-12-312022-06-3074AHCT257DVersion withdrawal

品质、可靠性及化学成分

型号可订购的器件编号化学成分RoHS / RHFMSLMSL无铅
74AHCT257D74AHCT257D,11874AHCT257D11

下表中的版本已停产。参见表 停产信息 了解更多信息。

型号可订购的器件编号化学成分RoHS / RHFMSLMSL无铅
74AHCT257D74AHCT257D,11274AHCT257D11
品质及可靠性免责声明

文档 (7)

文件名称标题类型日期
74AHC_AHCT257Quad 2-input multiplexer; 3-stateData sheet2017-07-20
AN11106Pin FMEA for AHC/AHCT familyApplication note2019-01-09
ahct257ahct257 IBIS modelIBIS model2013-04-07
74AHCT257D_Nexperia_Product_Reliability74AHCT257D Nexperia Product ReliabilityQuality document2022-05-04
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08

支持

如果您需要设计/技术支持,请告知我们并填写 应答表, 我们会尽快回复您。

模型

文件名称标题类型日期
ahct257ahct257 IBIS modelIBIS model2013-04-07

订购、定价与供货

型号Orderable part numberOrdering code (12NC)包装Packing quantity在线购买
74AHCT257D74AHCT257D,118935265469118Reel 13" Q1/T1- 订单产品

样品

安世半导体客户可通过我们的销售机构或直接通过在线样品商店订购样品: https://extranet.nexperia.com.

样品订单通常需要2-4天寄送时间。

如果您尚未取得安世半导体的直接采购帐号,我们的全球与区域经销网络可以协助您取得样品。