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參數(shù)資料
| 型號(hào)： | M27W402 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 通用總線功能 |
| 英文描述： | Synchronous 4-Bit Binary Counters 16-SOIC 0 to 70 |
| 中文描述： | 4兆位的256Kb x16低壓紫外線可擦寫可編程只讀存儲(chǔ)器和OTP存儲(chǔ)器 |
| 文件頁(yè)數(shù)： | 8/15頁(yè) |
| 文件大?。?/td> | 103K |
| 代理商： | M27W402 |
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M27W402
8/15
Figure 6. Programming and Verify Modes AC Waveforms
tAVEL
VALID
AI00730
A0-A17
Q0-Q15
VPP
VCC
G
DATA IN
DATA OUT
E
tQVEL
tVPHEL
tVCHEL
tEHQX
tELEH
tGLQV
tQXGL
tGHQZ
tGHAX
PROGRAM
VERIFY
PRESTO II Programming Algorithm
PRESTO II Programming Algorithm allows the
whole array to be programmed with a guaranteed
margin, in a typical time of 26.5 seconds. Pro-
gramming with PRESTO II consists of applying a
sequence of 100
μ
s program pulses to each byte
until a correct verify occurs (see Figure 7). During
programming and verify operation, a MARGIN
MODE circuit is automatically activated in order to
guarantee that each cell is programmed with
enough margin. No overprogram pulse is applied
since the verify in MARGIN MODE at V
CC
much
higher than 3.6V, provides necessary margin to
each programmed cell.
Program Inhibit
Programming of multiple M27W402s in parallel
with different data is also easily accomplished. Ex-
cept for E, all likeinputs including G of the parallel
M27W402 may be common. ATTL low level pulse
applied to a M27W402’s E input, with V
PP
at
12.75V, will program that M27W402. A high level
E input inhibits the other M27W402s from being
programmed.
Program Verify
A verify (read) should be performed on the pro-
grammed bits to determine that theywere correct-
ly programmed. The verify is accomplished with G
at V
IL
, E at V
IH
, V
PP
at 12.75V and V
CC
at 6.25V.
Figure 7. Programming Flowchart
AI00726D
n = 0
Last
Addr
VERIFY
E = 100
μ
s Pulse
++n
= 25
++ Addr
VCC= 6.25V, VPP= 12.75V
FAIL
CHECK ALL WORDS
1st: VCC= 5V
2nd: VCC= 2.7V
YES
NO
YES
NO
YES
NO
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M27W402-100B6TR | Synchronous 4-Bit Binary Counters 16-SOIC 0 to 70 |
| M27W402-100F6TR | Synchronous 4-Bit Binary Counters 16-PDIP 0 to 70 |
| M27W402-100K6TR | Synchronous 4-Bit Binary Counters 16-PDIP 0 to 70 |
| M27W402-100N6TR | Synchronous 4-Bit Binary Counters 16-SO 0 to 70 |
| M27W402-120B6TR | Synchronous 4-Bit Binary Counters 16-SO 0 to 70 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M27W402-100B6 | 功能描述:可擦除可編程ROM 4M (256Kx16) 100ns RoHS:否 制造商:Maxim Integrated 類型: 存儲(chǔ)容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-92 |
| M27W402-100B6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit 256Kb x16 Low Voltage UV EPROM and OTP EPROM |
| M27W402-100F6 | 制造商:STMicroelectronics 功能描述:256KX16 CMOS 3V - Rail/Tube |
| M27W402-100F6TR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:4 Mbit 256Kb x16 Low Voltage UV EPROM and OTP EPROM |
| M27W402-100K6 | 功能描述:可擦除可編程ROM 4M (256Kx16) 100ns RoHS:否 制造商:Maxim Integrated 類型: 存儲(chǔ)容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-92 |
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