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Número de pieza | W29C040 | |
Descripción | 512K X 8 CMOS FLASH MEMORY | |
Fabricantes | Winbond | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de W29C040 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
No Preview Available ! W29C040
512K × 8 CMOS FLASH MEMORY
GENERAL DESCRIPTION
The W29C040 is a 4-megabit, 5-volt only CMOS page mode EEPROM organized as 512K × 8 bits.
The device can be written (erased and programmed) in-system with a standard 5V power supply. A
12-volt VPP is not required. The unique cell architecture of the W29C040 results in fast write (erase/
program) operations with extremely low current consumption compared to other comparable 5-volt
flash memory products. The device can also be written (erased and programmed) by using standard
EPROM programmers.
FEATURES
• Single 5-volt write (erase and program)
operations
• Fast page-write operations
− 256 bytes per page
− Page write (erase/program) cycle: 5 mS
(typ.)
− Effective byte-write (erase/program) cycle
time: 19.5 µS
− Optional software-protected data write
• Fast chip-erase operation: 50 mS
• Two 16 KB boot blocks with lockout
• Typical page write (erase/program) cycles:
1K/10K (typ.)
• Read access time: 90/120 nS
• Ten-year data retention
• Software and hardware data protection
• Low power consumption
− Active current: 25 mA (typ.)
− Standby current: 20 µA (typ.)
• Automatic write (erase/program) timing with
internal VPP generation
• End of write (erase/program) detection
− Toggle bit
− Data polling
• Latched address and data
• All inputs and outputs directly TTL compatible
• JEDEC standard byte-wide pinouts
• Available packages: TSOP and PLCC
Publication Release Date: May 1999
- 1 - Revision A5
1 page W29C040
Toggle Bit (DQ6)- Write Status Detection
In addition to data polling, the W29C040 provides another method for determining the end of a write
cycle. During the internal write cycle, any consecutive attempts to read DQ6 will produce alternating
0's and 1's. When the write cycle is completed, this toggling between 0's and 1's will stop. The device
is then ready for the next operation. See Toggle Bit Timing Diagram.
Product Identification
The product ID operation outputs the manufacturer code and device code. Programming equipment
automatically matches the device with its proper erase and programming algorithms.
The manufacturer and device codes can be accessed by software or hardware operation. In the
software access mode, a six-byte command sequence can be used to access the product ID. A read
from address "00000 hex" outputs the manufacturer code "DA hex." A read from address "00001 hex"
outputs the device code "46 hex." The product ID operation can be terminated by a three-byte
command sequence.
In the hardware access mode, access to the product ID is activated by forcing CE and OE low, WE
high, and raising A9 to 12 volts.
TABLE OF OPERATING MODES
Operating Mode Selection
Operating Range: 0 to 70° C (Ambient Temperature), VDD = 5V ±10%, VSS = 0V, VHH = 12V
MODE
Read
Write
Standby
Write Inhibit
Output Disable
Product ID
PINS
CE OE WE
ADDRESS
VIL VIL VIH AIN
VIL VIH VIL AIN
VIH X X X
X VIL X X
X X VIH X
X VIH X X
VIL VIL VIH A0 = VIL; A1−A18 = VIL;
A9 = VHH
VIL VIL VIH A0 = VIH; A1−A18 = VIL;
A9 = VHH
DQ.
Dout
Din
High Z
High Z/DOUT
High Z/DOUT
High Z
Manufacturer Code DA
(Hex)
Device Code
46 (Hex)
Publication Release Date: May 1999
- 5 - Revision A5
5 Page W29C040
Power-up Timing
PARAMETER
Power-up to Read Operation
Power-up to Write Operation
CAPACITANCE
(VDD = 5.0V, TA = 25° C, f = 1 MHz)
PARAMETER
DQ Pin Capacitance
Input Pin Capacitance
SYMBOL
CDQ
CIN
SYMBOL
TPU. READ
TPU. WRITE
CONDITIONS
VDQ = 0V
VIN = 0V
TYPICAL
100
10
UNIT
µS
mS
MAX.
12
6
UNIT
pF
pF
AC CHARACTERISTICS
AC Test Conditions
(VDD = 5.0V ±10% for 90,120 nS
PARAMETER
Input Pulse Levels
Input Rise/Fall Time
Input/Output Timing Level
Output Load
AC Test Load and Waveform
CONDITIONS
0V to 3V
<5 nS
1.5V/1.5V
1 TTL Gate and CL = 100 pF for 90/120/150 nS
+5V
DOUT
100 pF for 90/120 nS
(Including Jig and Scope)
1.8KΩ
1.3KΩ
Input
3V
0V
Output
1.5V 1.5V
Test Point
Test Point
- 11 -
Publication Release Date: May 1999
Revision A5
11 Page |
Páginas | Total 20 Páginas | |
PDF Descargar | [ Datasheet W29C040.PDF ] |
Número de pieza | Descripción | Fabricantes |
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