175 Degree High Temperature Resistance Nand Flash Memory Module for Downhole Tools

Product Description

Product Description
High Temperature Resistance NAND-Flash Memory
LDMF1GA /4GA
The chip is high-temperature NAND-Flash memory, with fast reading and writing, high reliability, excellent performance characteristics under both of high and low temperature. It can Operate in -45 ºC ~ 175 ºC in harsh environment for Long-term.
Operating temperature: -45ºC ~ +175ºC
The highest operating current: 90mA
Standby current: <2ma
Operating Voltage Range(Vcc): 2.7 V ~ 3.6 V
Input High level (V): 0.8Vcc ~ Vcc+0.3
Input Low level (V): -0.3 ~ 0.2Vcc
Output High level (V): 2.4 ~ Vcc
Output Low level (V): -0.3 ~ 0.4
High temperature data hold time: ≥500h
Operating life: ≥2000h
Read/write Rate: 2.8 ms/page read 2.15ms/page write
Package: 16 PIN DIP PB-Free Package
Product Parameters
Pin Description:

PIN	Functional description
IO0 ~ IO7	Multiplexed input / output The bidirectional I/Os transfer address, data, and command information. When C(-)E(-) pin is high,the I/Os is High impedance.
CLE	Command Latch Enable When CLE is high, the command is latched into the command register through the IO port on the rising edge of the signal.
ALE	Address Latch Enable When ALE is high,the address is latched into the address register through the IO port on the rising edge of the signal.
C(-)E(-)	Chip Enable Enables or disables the chip.
R(-)E(-)	Read Enable Control the output of serial data. When the signal is low, the data is driven to the IO port. Data is valid after tREA time on the falling edge of R(-)E(-), and the internal column address counter is incremented automatically.
W(-)E(-)	Write Enable Control the input of serial data,command, address and data is latched on the W(-)E(-) Rising edge.
R/B(-)	Ready/Busy output Indicates the device operating state. When low, indicates that programming, erase, or random read operation is in progress, when high, indicates that no operation or operation is finished. It is recommended to connect a pull-up resistor (4.7K~10K) to the pin.
Vcc	Power Supply
Vss	GND

Addressing cycle:
LDMF1GA:

Addressing	IO 0	IO 1	IO 2	IO 3	IO 4	IO 5	IO 6	IO 7
1st cycle	CA0	CA1	CA2	CA3	CA4	CA5	CA6	CA7	Column Address 1
2nd cycle	CA8	CA9	CA10	CA11	0	0	0	0	Column address 2
3rd cycle	PA0	PA1	PA2	PA3	PA4	PA5	PA6	BA7	Row address 1
4th cycle	BA8	BA9	BA10	BA11	BA12	BA13	BA14	BA15	Row address 2
5th cycle	BA16	BA17	BA18	0	0	0	0	0	Row address 3

Notes: 1. CAx = column address, PAx = page address, BAx = block address ,the page address, block address called the row address. Byte address of page called column address
Page size x8: 8640 bytes (2048 + 64 bytes)
Block size: 128 pages (1024K + 8K bytes)
Block number: 4096 blocks
LDMF4GA:

Addressing	IO 0	IO 1	IO 2	IO 3	IO 4	IO 5	IO 6	IO 7
1st cycle	CA0	CA1	CA2	CA3	CA4	CA5	CA6	CA7	Column Address 1
2nd cycle	CA8	CA9	CA10	CA11	CA12	CA13	0	0	Column address 2
3rd cycle	PA0	PA1	PA2	PA3	PA4	PA5	PA6	BA7	Row address 1
4th cycle	BA8	BA9	BA10	BA11	BA12	BA13	BA14	BA15	Row address 2
5th cycle	BA16	BA17	BA18	0	0	0	0	0	Row address 3

Notes: 1. CAx = column address, PAx = page address, BAx = block address ,the page address, block address called the row address. Byte address of page called column address
Page size x8: 8640 bytes (8192 + 448 bytes)
Block size: 128 pages (1024K + 56K bytes)
Block number: 4096 blocks
Instruction List:

Function	1st cycle	2nd cycle
Reset	FFh	-
Read	00h	30h
Page program	80h	10h
Block erase	60h	D0h

Invalid block management
All locations of the device are erased (0xFF) except the address location in invalid block when shipped from the factory. The invalid block flag is located on the first byte of the spare area on the last page of the block. Invalid block data is non-0xFF. The system must establish invalid block management to avoid using invalid block. The start address of the first block is 0000h, which is guaranteed to be valid shipped from the factory.
The bad block table is created by the following flowchart (below).
Operating Steps:
1. An error occurred on page n of block A during erasing or programming operation.Copy the data from the first page to the (n-1) -th page of block A to the same position in the other empty block B.Copy the buffer data need to be saved to the n-th page position of block B.Add block A to the Bad block table.Command latch cycleAddress latch cycle sequenceThe input data latches cycle sequenceOutput data latches cycle sequenceSystem instructions Read operation:
Read operation is implemented by writing 00h-30h command to the command register. First, write 00h command, then, write the address with 5 cycles, last, write 30h command. After completion, the R/B(-) is released. the user determine the completion of the internal data transmission by detecting the status of R/B(-). Once the completion of the transmission, the user can start the RE, the data read out continuously.
Read operation sequence is as follows.
Programming operation:
Before programming operation, user must erase the block firstly. Programming operation is implemented by writing 80h-10h command to the command register. First write 80h command, then, write the address with 5 cycles, and then load the data into the internal data buffer register, last, write 10h after the completion of the command to confirm Write. After programming completion, the R/B(-) is released.
Programming operation sequence
Erase operation:
The erase operation command is 60h-D0h. First write 60h command, then write the address with 3 cycles , and then write D0h command to confirm the erase. After the completion of erasing, R/B(-) is released.
Erase operation sequence
Reset operationReset operation sequence
Note: If the write data to the page before operation to complete restoration command input, may cause data corruption, the damage is not only is page programming, can also affect the adjacent pages.
Sequential instructions(-45ºC~175ºC):As the temperature increases, the response speed of the device after operation can slow down.User program execution sequence a certain amount of allowance, suggest to increase the high temperature stability.
Timing parameter list(25ºC):

Symbol	MIN	Standard	MAX	Units	Dscription
tPROG		0.8	3	ms	Page program time
tBERS		1.5	10	ms	Block erasure time
tCLS	15			ns
tCLH	5			ns
tCS	20			ns
tCH	5			ns
tWP	15			ns
tALS	15			ns
tALH	5			ns
tDS	15			ns
tDH	5			ns
tWC	30			ns
tWH	10			ns
tADL	70			ns
tR			60	μs
tAR	10			ns
tCLR	10			ns
tRR	20			ns
tRP	15			ns
tWB			100	ns
tRC	30			ns
tREA			20	ns
tCEA			25	ns
tRHZ			100	ns
tCHZ			30	ns
tCSD	10			ns
tRHOH	15			ns
tRLOH	5			ns
tCOH	15			ns
tREH	10			ns
tIR	0			ns
tRHW	100			ns
tWHR	60			ns
tRST			5/10/500	μs	Read/programming/erasing

Company Profile
ZITN is a national high-tech enterprise, it was established in 2002 by many high tech engineers who have vast experience in microelectronic Industry. With 19 years' development, ZITN became a recognized industry leader in China, and we have total 175 employees, more than 49% of them are from R&D team. We mainly design, develop and manufacture high accuracy inclinometer, quartz based accelerometers, inertial measurement unit systems, IF Circuit products and Nand flash memory which widely used for aerospace, oil and gas drilling, geological exploration fields.
Our Advantages
a. Experience in the hybrid thick film IC &high end sensors development and manufacture fields more than 19 years.
b. Invention patents more than 40 projects.
c. Scientific institution, production base more than 20000 square meters.
d. More than 49% of employees are from R&D team.
e. New cooperating customers more than1000 in recently 3 years.
f. Production capacity more than 100000/year;
g. Professional pre-sales, after-sales guide, solutions can be provided based on customers inquiries.
h. Customized Service.
Miniature volume ! Independent creative technology!
From the servo-circuit production to assmble the sensors at one-stop .
Packaging & Shipping
Customized anti-static box.
Delivery via express (DHL, Fedex, TNT, UPS etc...)
Delivery date within 7-10 days after the shipment from our factory.
FAQ
What kind of service can you provide?
Except the stanadrd model, we also can provide the products accorded with customers' detailed requirments, such as calibration, repair, upgrade etc...
What kind of test of the product will be done before leave your factory?
We have a strict quality control system to guarantee the product performance, such as Non-magnetic turntable calibration system, Shock&Vibration test system, temperature cycle test system etc...
Can I get a sample for evaluation?
Yes, we're willing to provide the sample for evaluation and guide you for any techical questions in the whole process.
What's the delivery options can I choose?
We can provide the airline express delivery service , such as DHL/Fedex/TNT express, normally 7- 10 days for transportation needed.Can I visit your company if I'm interested?
Yes, our company locate at Qingdao city, we have over 175 employees here, included the R&D, production, Financial, Marketing, etc...
For more detailed information, please free feel contact with us, please send enquiry to our sales manager directly!