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GL6840B
GL6840B - Brand New LGS IC Chips
Credit Card - One-month free return and one year warranty.
- Full or Partial Refund, if the item is not as described
- Full Refund if you don't receive your order
Description
GL6840A are monolithic integrated circuits designed to replace the mechanical
bell in telephone sets, in connection with an electro acoustical converter.
The device can drive either directly a piezo ceramic converter(buzzer) or a
small loudspeaker. In this case a transformer is needed. The two tone frequen
cies generated are switched by an internal oscillator in a fast sequence and
made audible across output amplifiers in the transducer, both tone frequencies
and switching frequency can be externally adjusted. The supply voltage is
obtained from the AC rings signal and the circuit is designed so that noise on
the line or variations on the ringing signal cannot affect the correct
operation of the devices.
The output bridge configuration allows to use a high impedance transducer with
acoustical results much better than in a single ended configuration. The two
outputs can also be connected independently to different converters or
actuators(acoustical, opto and logic)
Features
• Low current consumption, in order to allow the parallel operation of 4
devices
• Integrated rectifier bridge with zener diodes to protect against
overvoltages
• Little external circuitry
• Tone and switching frequencies adjustable by external components
• Integrated voltage and current hysteresis
• Bridge output configuration
Shipping
| First item | Additional item | Service | Description |
|---|---|---|---|
| $0.00 | Free | Free Shipping | Estimated 15-30 business days via Registered Air Mail or others |
| $27.50 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
| $0.00 | Free | Buyer cooperating carrier | Using buyer's cooperating carrier. Buyer should create a shipping label and share it to us. And then we will call carrier for pickup |
| $38.00 | Free | Expedited Shipping | Estimated delivery time is 3-5 business days, with some areas possibly taking 6-9 business days depending on the shipping address. The main courier companies include but are not limited to UPS, DHL, and FedEx. |
Delivery
- The transportation time may be delayed due to customs clearance, local holidays or abnormal events.
- The estimated time is based on the fastest speed provided by commercial couriers (DHL, FedEx, UPS etc).
- The estimated time does not include the lead time of the item. The lead time of most items is 2–5 business days. If more than 5 working days are needed, we will manually confirm with you.
| Flag | Country | Express Delivery | Standard Delivery |
|---|---|---|---|
 | United States | 3 - 5 days | 10-15 days |
 | Canada | 3 - 5 days | 10-20 days |
 | Mexico | 3 - 5 days | 10-17 days |
 | Germany | 3 - 5 days | 10-12 days |
 | Italy | 3 - 5 days | 10-15 days |
 | United Kingdom | 3 - 5 days | 10-12 days |
Estimated Delivery
This item requires 2-5 business days for processing before shipping after payment is confirmed. And depending on the destination and shipping method.
Return Policy
| Return window | Refund type | Return shipping |
|---|---|---|
| 60 days after receiving item | Money Back or Replacement | Buyer pays for return shipping |
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