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参数资料
| 型号： | M39208-15WNB1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | PROM |
| 英文描述： | 256K X 8 FLASH 2.7V PROM, 150 ns, PDSO32 |
| 封装： | 8 X 14 MM, PLASTIC, TSOP-32 |
| 文件页数： | 7/30页 |
| 文件大小： | 218K |
| 代理商： | M39208-15WNB1 |
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Flash Sector Unprotection. Flash sectors can be
unprotected to allow updating of their contents.
Note that the Sector Unprotection unprotects all
sectors (sector 0 up to sector 7).
Flash Sector Unprotection is activated with a spe-
cific sequence of levels applied on EF, EE, G, A0,
A1, A6, A9, A12 and A15; this sequence includes a
verification of the Protection status on DQ0-DQ7
as shown in Figure 9 and Table 9.
This allows a guarantee of the retention of the
Protection status.
Remarks:
– The Verify operation is a read with a simulated
worst case conditions. This allows a guarantee
of the retention of the Protection status
– During the application life, the Sector protection
status can be accessed with a regular Read
instruction without "high voltage" VID on A9. This
instruction is detailed in Table 4.
Reset Instruction. The Reset instruction resets
the device internal logic in a few
s. Reset is an
instruction of either one write operation or three
write operations (refer to Table 4).
Supply Rails. Normal precautions must be taken
for supply voltage decoupling, each device in a
system should have the VCC rail decoupled with a
0.1
F capacitor close to the VCC and VSS pins. The
printed circuit board trace width should be sufficient
to carry the VCC program and erase currents re-
quired.
AI01950
1.5V
2.4V
0.45V
Figure 10. AC Testing Input Output Waveform
AI02596B
VCC
CL = 30pF
CL includes JIG capacitance
VOUT = 1.5V when the DEVICE
UNDER TEST is in the
Hi-Z output state.
DEVICE
UNDER
TEST
IOL
IOH
Figure 11. Output AC Testing Load Circuit
Symbol
Parameter
Test Condition
Min
Max
Unit
CIN
Input Capacitance
VIN = 0V
6
pF
COUT
Output Capacitance
VOUT = 0V
12
pF
Note: 1. Sampled only, not 100% tested.
Table 11. Capacitance (1) (TA = 25
°C, f = 1 MHz )
Input Rise and Fall Times
≤ 10ns
Input Pulse Voltages
0.45V to 2.4V
Input Timing Ref. Voltages
0.8V and 2V
Output Timing Ref. Voltages
1.5V
Table 10. AC Measurement Conditions
15/30
M39208
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相关代理商/技术参数 |
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| M39208-15WNB1T | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Single Chip 2 Mbit Flash and 64 Kbit Parallel EEPROM Memory |
| M39208-15WNB5T | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Single Chip 2 Mbit Flash and 64 Kbit Parallel EEPROM Memory |
| M39208-15WNB6T | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Single Chip 2 Mbit Flash and 64 Kbit Parallel EEPROM Memory |
| M39208NA | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Single Chip 2 Mbit Flash and 64 Kbit Parallel EEPROM Memory |
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