* 3-to-8 line decoder/demultiplexer; inverting


* General description

The 74HC138; 74HCT138 is a high-speed Si-gate CMOS device and is pin compatible
with Low-power Schottky TTL (LSTTL).
The 74HC138; 74HCT138 decoder accepts three binary weighted address inputs (A0, A1
and A3) and when enabled, provides 8 mutually exclusive active LOW outputs (Y0 to Y7).
The 74HC138; 74HCT138 features three enable inputs: two active LOW (E1 and E2) and
one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is
HIGH.
This multiple enable function allows easy parallel expansion of the 74HC138; 74HCT138
to a 1-of-32 (5 lines to 32 lines) decoder with just four 74HC138; 74HCT138 ICs and one
inverter.
The 74HC138; 74HCT138 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. Not used enable inputs must be permanently tied to their appropriate active
HIGH- or LOW-state.
The 74HC138; 74HCT138 is identical to the 74HC238; 74HCT238 but has inverting
outputs.


* Features

• Demultiplexing capability
• Multiple input enable for easy expansion
• Complies with JEDEC standard no. 7A
• Ideal for memory chip select decoding
• Active LOW mutually exclusive outputs
• ESD protection:
   - HBM EIA/JESD22-A114-C exceeds 2000 V
   - MM EIA/JESD22-A115-A exceeds 200 V
• Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Datasheet :

Delivery

1. The initial delivery day shall be the day following the day on which the product is forwarded to the delivery service.
1) Regular home-delivery (excluding order date and holidays): Seoul/Gyeonggi 3~5days, other regions 3~8days
2) Postal service: Seoul/Gyeonggi 3~5days
2. During public holidays and weekends, there will be no delivery, and any other days during which delivery is impracticable due to a force majeure event may cause delay in the delivery.
3. The buyers both within and outside of Korea shall be responsible for any delivery fee that may arise. But the products bought over 300,000 won will be delivered free of charge.

Cancellation and Refund

1. The buyer may cancel the purchase order before the product is shipped, and if the product is in the process of being delivered, transaction shall be handled pursuant to the Article 15 of products return.
2. If the product is on standby for delivery after the payment, the buyer may cancel the order at any time except for the particular circumstances.
3. If credit card has been used for the payment, the payment shall immediately be refunded as soon as the cancellation process is completed. If cash has been used for the payment, the payment shall be refunded in 5 business days via direct account transfer or others.

Return and Exchange

1. The buyer may demand a return of the product within three days after the receipt of the delivery.
2. The cost for the return delivery shall be borne by the liable party.
3. The payment of refund upon return of the product shall be completed within 5 days after the Company has received the product from the buyer.
4. The Company shall refund, return and exchange in accordance with the buyer’s demand in the following cases. Such transaction shall be processed within 10 days after the delivery.
1) Delivered product does not match with the purchase order.
2) Delivered product is lost or damaged due to the Company’s error.
3) Delivery is considerably delayed than what has been scheduled.
4) Otherwise, legitimate reasons are submitted to the Company for the demand by the buyer.

Delivery/Returned goods/Exchange Address

Guro branch : 3127, Ma-Dong, Central Distribution Complex, 1258, Guro-Dong, Guro-Gu, Seoul, Korea, 152-721
TEL : +82-2-2681-5517(REP)
FAX : +82-2-2681-5518
Support: +82-2-3397-3613
E-mail : shop@semidj.com

Overseas Delivery Service

1. The Company provides the service in accordance with the overseas delivery procedure of the products whose trade contract is already signed through the overseas delivery network that has business connection with the Company. Overseas delivery is divided into as follows:
1) A domestic delivery phase: until the buyer’s product is delivered to a logistics center of a third party in business cooperation with the Company
2) An overseas delivery phase: until the product is delivered to the recipient through the overseas delivery network
2. For overseas delivery, the buyer’s order may be cancelled depending on the status of the delivery request. Return requested due to change of mind during delivery is limited to the phase of domestic delivery. Once the product has completed the domestic delivery phase and entered the overseas delivery phase, a return is not permitted unless the Company approves return or exchange due to an original defect in the delivered product.
3. A buyer requesting the Company’s approval on return or exchange must approve the original product defect or other grounds for return or exchange by submitting to the Company objective evidence. The costs and expenses for the delivery in connection with the return or exchange shall be paid by the Company once objective evidence has been approved.
4. The buyer who has received an approval to return or exchange of the product from the Company shall contact the DJmall customer center before the return of the product, including documents to verify costs and expenses for the delivery.
5. If the estimated cost of the delivery paid at purchase is greater than the actual delivery cost, the difference will be refunded to the buyer.
6. If the estimated cost of the delivery paid at purchase is less than the actual delivery cost, the buyer must make an additional payment to complete the delivery. If the difference is not paid within 3 months despite of continuous notice, the product may become the Company’s own property.
7. In the event of using overseas delivery service, the recipient is liable for all customs, taxes, duties and other cost imposes by the country to which the delivery is made.
'BUYER IS RESPONSIBLE FOR THE DELIVERY FEE'