DatasheetsPDF.com

74HC238 Dataheets PDF



Part Number 74HC238
Manufacturers nexperia
Logo nexperia
Description 3-to-8 line decoder/demultiplexer
Datasheet 74HC238 Datasheet74HC238 Datasheet (PDF)

74HC238; 74HCT238 3-to-8 line decoder/demultiplexer Rev. 7 — 2 September 2021 Product data sheet 1. General description The 74HC238; 74HCT238 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1 and E2 and E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '238 ICs.

  74HC238   74HC238



Document
74HC238; 74HCT238 3-to-8 line decoder/demultiplexer Rev. 7 — 2 September 2021 Product data sheet 1. General description The 74HC238; 74HCT238 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1 and E2 and E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '238 ICs and one inverter. The '238 can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC. 2. Features and benefits • Wide supply voltage range from 2.0 to 6.0 V • CMOS low power dissipation • High noise immunity • Demultiplexing capability • Multiple input enable for easy expansion • Ideal for memory chip select decoding • Active HIGH mutually exclusive outputs • Input levels: • For 74HC238: CMOS level • For 74HCT238: TTL level • Complies with JEDEC standards • JESD8C (2.7 V to 3.6 V) • JESD7A (2.0 V to 6.0 V) • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B • ESD protection: • HBM JESD22-A114F exceeds 2000 V • MM JESD22-A115-A exceeds 200 V • Multiple package options • Specified from -40 °C to +85 °C and from -40 °C to +125 °C 3. Ordering information Table 1. Ordering information Type number Package Temperature range Name 74HC238D -40 °C to +125 °C SO16 74HCT238D 74HC238PW -40 °C to +125 °C TSSOP16 74HCT238PW 74HC238BQ -40 °C to +125 °C DHVQFN16 74HCT238BQ Description plastic small outline package; 16 leads; body width 3.9 mm plastic thin shrink small outline package; 16 leads; body width 4.4 mm plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 16 terminals; body 2.5 × 3.5 × 0.85 mm Version SOT109-1 SOT403-1 SOT763-1 Nexperia 4. Functional diagram A0 1 A1 2 3 TO 8 DECODER A2 3 E1 4 E2 5 E3 6 Fig. 1. Logic symbol 15 Y0 14 Y1 13 Y2 ENABLE 12 Y3 EXITING 11 Y4 10 Y5 9 Y6 7 Y7 001aag752 E1 E2 E3 A0 A1 A2 Fig. 3. Logic diagram 74HC238; 74HCT238 3-to-8 line decoder/demultiplexer A0 1 A1 2 A2 3 3 TO 8 DECODER E1 4 E2 5 E3 6 Fig. 2. Functional diagram ENABLE EXITING 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 9 Y6 7 Y7 001aag753 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 001aag754 74HC_HCT238 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 7 — 2 September 2021 © Nexperia B.V. 2021. All rights reserved 2 / 15 Nexperia 5. Pinning information 74HC238; 74HCT238 3-to-8 line decoder/demultiplexer 5.1. Pinning 74HC238 74HCT238 A0 1 A1 2 16 VCC 15 Y0 A2 3 14 Y1 E1 4 13 Y2 E2 5 12 Y3 E3 6 11 Y4 Y7 7 10 Y5 GND 8 9 Y6 001aag755 Fig. 4. Pin configuration SOT109-1 (SO16) and SOT403-1 (TSSOP16) 74HC238 74HCT238 1 A0 16 VCC terminal 1 index area A1 2 A2 3 E1 4 E2 5 E3 6 Y7 7 GND(1) 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 GND 8 Y6 9 001aag756 Transparent top view (1) This is not a ground pin. There is no electrical or mechanical requirement to solder the pad. In case soldered, the solder land should remain floating or connected to GND. Fig. 5. Pin configuration SOT763-1 (DHVQFN16) 5.2. Pin description Table 2. Pin description Symbol A0, A1, A2 E1, E2 E3 Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7 GND VCC Pin 1, 2, 3 4, 5 6 15, 14, 13, 12, 11, 10, 9, 7 8 16 Description address input enable input (active LOW) enable input (active HIGH) output ground (0 V) supply voltage 74HC_HCT238 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 7 — 2 September 2021 © Nexperia B.V. 2021. All rights reserved 3 / 15 Nexperia 74HC238; 74HCT238 3-to-8 line decoder/demultiplexer 6. Functional description Table 3. Function table H = HIGH voltage level; L = LOW voltage level; X = don’t care. Inputs Outputs E1 E2 E3 A0 A1 A2 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 H X X X X X L L L L L L L L X H X X X X L L L L L L L L X X L X X X L L L L L L L L L L H L L L H L L L L L L L L L H H L L L H L L L L L L L L H L H L L L H L L L L L L L H H H L L L L H L L L L L L H L L H L L L L H L L L L L H H L H L L L L L H L L L L H L H H L L L L L L H L L L H H H H L L L L L L L H 7. Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions Min Max Unit VCC IIK IOK IO ICC IGND Tstg Ptot supply voltage input clamping current output clamping current output current supply current ground current storage temperature total power dissipation VI .


MAX17113 74HC238 74HCT238


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)