⚠ All product names, trademarks, brands, and logos on this site are the property of their respective owners. Their use is for identification purposes only and does not imply any affiliation or authorization from the rights holders. We are not authorized dealers or distributors of the brand. The warranty is provided by us, not the original manufacturer.
AT29C257-90JI
AT29C257-90JI - Brand New Intel / Altera Memory
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
The AT29C257 is a 5-volt-only in-system Flash programmable and erasable read
only memory (PEROM). Its 256K of memory is organized as 32,768 words by 8
bits. Manufactured with Atmel’s advanced nonvolatile CMOS technology, the
device offers access times to 70 ns with power dissipation of just 275 mW.
When the device is deselected, the CMOS standby current is less than 300 µA.
The device endurance is such that any sector can typically be written to in
excess of 10,000 times.
To allow for simple in-system reprogrammability, the AT29C257 does not require
high input voltages for programming. Five-volt-only commands determine the
operation of the device. Reading data out of the device is similar to reading
from a static RAM. Reprogramming the AT29C257 is performed on a page basis;
64-bytes of data are loaded into the device and then simultaneously
programmed. The contents of the entire device may be erased by using a 6-byte
software code (although erasure before programming is not needed).
During a reprogram cycle, the address locations and 64-bytes of data are
internally latched, freeing the address and data bus for other operations.
Following the initiation of a program cycle, the device will automatically
erase the page and then program the latched data using an internal control
timer. The end of a program cycle can be detected by DATA polling of I/O7.
Once the end of a program cycle has been detected a new access for a read,
program or chip erase can begin.
Features
• Fast Read Access Time - 70 ns
• 5-Volt-Only Reprogramming
• Page Program Operation
Single Cycle Reprogram (Erase and Program)
Internal Address and Data Latches for 64-Bytes
• Internal Program Control and Timer
• Hardware and Software Data Protection
• Fast Program Cycle Times
Page (64-Byte) Program Time - 10 ms
Chip Erase Time - 10 ms
• DATA Polling for End of Program Detection
• Low Power Dissipation
50 mA Active Current
300 µA CMOS Standby Current
• Typical Endurance > 10,000 Cycles
• Single 5V ± 10% Supply
• CMOS and TTL Compatible Inputs and Outputs
• Pin-Compatible with AT29C010A and AT29C512 for Easy System Upgrades
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 |
电子元器件与工控产品的真实买家评价
In Stock 23K256-I/SN
23K256-I/SN - Brand New Microchip Technology Memory
In Stock 24AA025E48T-I/OT
24AA025E48T-I/OT - Brand New Microchip Technology Memory
In Stock 24AA02T-I/OT
24AA02T-I/OT - Brand New Microchip Technology Memory
In Stock 24AA64-I/MS
24AA64-I/MS - Brand New Microchip Technology Memory
In Stock 24AA64-I/SN
24AA64-I/SN - Brand New Microchip Technology Memory
In Stock 24AA64T-I/MS
24AA64T-I/MS - Brand New Microchip Technology Memory
In Stock 24AA64T-I/OT
24AA64T-I/OT - Brand New Microchip Technology Memory
In Stock 24FC256-I/SN
24FC256-I/SN - Brand New Microchip Technology Memory
In Stock 24LC128-I/ST
24LC128-I/ST - Brand New Microchip Technology Memory
In Stock 24lc128t-i/sn
24lc128t-i/sn - Microchip - Technology Memory
