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:
The 74AHC257; 74AHCT257 is identical to the 74AHC258; 74AHCT258, but has non-inverting (true) outputs.
74AHCT257D: Product Block Diagram
sot109-1_3d
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| Quad 2-input multiplexer; 3-state (REV 2.0) PDF (92.0 kB) 74AHC_AHCT257 [English] | 09 May 2008 |
Application Notes (5)
| Name/Description | Modified Date |
|---|---|
| Sorting through the low voltage logic maze (REV 1.0) PDF (72.0 kB) AN10156 [English] | 13 Mar 2013 |
| Package lead inductance considerations in high-speed applications (REV 1.0) PDF (43.0 kB) AN212 [English] | 13 Mar 2013 |
| Ground and VCC Bounce of High-Speed Integrated Circuits (REV 1.0) PDF (25.0 kB) AN223 [English] | 13 Mar 2013 |
| Live Insertion Aspects of Philips Logic Families (REV 1.0) PDF (73.0 kB) AN252 [English] | 13 Mar 2013 |
| Pin FMEA for AHC/AHCT family (REV 1.0) PDF (52.0 kB) AN11106 [English] | 04 Nov 2011 |
Brochures (2)
| Name/Description | Modified Date |
|---|---|
| 電圧レベルシフタ (REV 1.1) PDF (3.1 MB) 75017511_JP [English] | 16 Feb 2015 |
| Voltage translation: How to manage mixed-voltage designs with NXP® level translators (REV 1.0) PDF (2.6 MB) 75017511 [English] | 20 May 2014 |
Selector Guides (2)
| Name/Description | Modified Date |
|---|---|
| ロジック製品セレクションガイド... (REV 1.0) PDF (38.3 MB) LOGIC_SELECTION_GUIDE_2015_JP [English] | 19 Nov 2015 |
| Logic selection guide 2016 (REV 1.1) PDF (15.3 MB) 75017285 [English] | 08 Jan 2015 |
Package Information (1)
| Name/Description | Modified Date |
|---|---|
| plastic small outline package; 16 leads; body width 3.9 mm (REV 1.0) PDF (192.0 kB) SOT109-1 [English] | 08 Feb 2016 |
Packing (1)
| Name/Description | Modified Date |
|---|---|
| SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... (REV 4.0) PDF (210.0 kB) SOT109-1_118 [English] | 24 Apr 2013 |
Supporting Information (2)
| Name/Description | Modified Date |
|---|---|
| Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW [English] | 08 Oct 2009 |
| Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE [English] | 08 Oct 2009 |
IBIS Model
- ahct257 IBIS model (REV 1.0) ibs AHCT257 4/7/2013
Ordering Information
| Product | Status | Family | VCC (V) | Function | Logic switching levels | Description | Output drive capability (mA) | Package version | tpd (ns) | Power dissipation considerations | Tamb (Cel) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name | No of pins |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74AHCT257D | Active | AHC(T) | 4.5 - 5.5 | Digital multiplexers | TTL | TTL enabled (3-State) | +/- 8 | SOT109-1 | 3.7 | low | -40~125 | 93 | 9.7 | 52 | SO16 | 16 |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | EFR | IFR(FIT) | MTBF(hour) | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 74AHCT257D | | SOT109-1 | SO-SOJ-REFLOW
SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE | Reel 13" Q1/T1 | Active | 74AHCT257D,118 (9352 654 69118) | 74AHCT257D | 74AHCT257D |    | week 35, 2004 | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
| Bulk Pack | Active | 74AHCT257D,112 (9352 654 69112) | 74AHCT257D | 74AHCT257D | | week 35, 2004 | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
- Quad 2-input multiplexer; 3-state 74AHCT257PW
- Sorting through the low voltage logic maze 74LVC_H_245A_Q100
- Package lead inductance considerations in high-speed applications 74LVC_H_245A_Q100
- Ground and VCC Bounce of High-Speed Integrated Circuits 74ALVC164245DGG-Q100
- Live Insertion Aspects of Philips Logic Families 74HC_T_245_Q100
- Pin FMEA for AHC/AHCT family 74AHC_T_245_Q100
- 電圧レベルシフタ 74AVC16245DGG-Q100
- Voltage translation: How to manage mixed-voltage designs with NXP® level translators 74AVC16245DGG-Q100
- ロジック製品セレクションガイド... 74LVC_H_245A_Q100
- Logic selection guide 2016 74LVC_H_245A_Q100
- ahct257 IBIS model 74AHCT257PW
- plastic small outline package; 16 leads; body width 3.9 mm NPIC6C596A_Q100
- Footprint for reflow soldering NPIC6C596A_Q100
- Footprint for wave soldering NPIC6C596A_Q100
- SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering... NPIC6C596A_Q100
- 74AHC_T_257
- SA614A
