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參數(shù)資料
| 型號： | 27128A |
| 英文描述： | 27128A |
| 中文描述： | 27128A |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 107K |
| 代理商： | 27128A |
tAVPL
VALID
AI00772
A0-A13
Q0-Q7
VPP
VCC
P
G
DATA IN
DATA OUT
E
tQVPL
tVPHPL
tVCHPL
tPHQX
tPLPH
tGLQV
tQXGL
tELPL
tGHQZ
tGHAX
PROGRAM
VERIFY
Figure 6. Programming and Verify Modes AC Waveforms
AI00775B
n = 1
Last
Addr
VERIFY
P = 1ms Pulse
++n
> 25
++ Addr
VCC = 6V, VPP = 12.5V
FAIL
CHECK ALL BYTES
VCC = 5V, VPP 5V
YES
NO
YES
NO
YES
NO
P = 3ms Pulse by n
Figure 7. Programming Flowchart
continually monitored to determine when it has
been successfully programmed. A flowchart of the
M27128A Fast Programming Algorithm is shown
on the last page. The Fast Programming Algorithm
utilizes two different pulse types: initial and over-
program.
The duration of the initial P pulse(s) is 1ms, which
will then be followed by a longer overprogram pulse
of length 3ms by n (n is equal to the number of the
initial one millisecond pulses applied to a particular
M27128A location), before a correct verify occurs.
Up to 25 one-millisecond pulses per byte are pro-
vided for before the over program pulse is applied.
The entire sequence of program pulses and byte
verifications is performed at V
CC
= 6V and V
PP
=
12.5V. When the Fast Programming cycle has been
completed, all bytes should be compared to the
original data with V
CC
= 5 and V
PP
= 5V.
Program Inhibit
Programming of multiple M27128A’s in parallel with
different data is also easily accomplished. Except
for E, all like inputs (including G) of the parallel
M27128A may be common. A TTL low pulse ap-
plied to a M27128A’s E input, with V
PP
= 12.5V, will
program that M27128A. A high level E input inhibits
the other M27128As from being programmed.
DEVICE OPERATION
(cont’d)
7/10
M27128A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| 27128A-20/B | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| 271-28K | 功能描述:金屬膜電阻器 - 透孔 USE 271-28K-RC RoHS:否 制造商:IRC 電阻:63.4 kOhms 容差:1 % 功率額定值:100 mW 電壓額定值:200 V 溫度系數(shù):100 PPM / C 端接類型:Axial 工作溫度范圍: 尺寸:2.3 mm Dia. x 6.4 mm L 封裝:Bulk |
| 271-28K/AP | 功能描述:金屬膜電阻器 - 透孔 28Kohms 1% 50PPM RoHS:否 制造商:IRC 電阻:63.4 kOhms 容差:1 % 功率額定值:100 mW 電壓額定值:200 V 溫度系數(shù):100 PPM / C 端接類型:Axial 工作溫度范圍: 尺寸:2.3 mm Dia. x 6.4 mm L 封裝:Bulk |
| 271-28K/AP-RC | 功能描述:金屬膜電阻器 - 透孔 28Kohms 1% 50PPM RoHS:否 制造商:IRC 電阻:63.4 kOhms 容差:1 % 功率額定值:100 mW 電壓額定值:200 V 溫度系數(shù):100 PPM / C 端接類型:Axial 工作溫度范圍: 尺寸:2.3 mm Dia. x 6.4 mm L 封裝:Bulk |
| 271-28K/REEL | 功能描述:金屬膜電阻器 - 透孔 USE 271-28K/REEL-RC 50PPM RoHS:否 制造商:IRC 電阻:63.4 kOhms 容差:1 % 功率額定值:100 mW 電壓額定值:200 V 溫度系數(shù):100 PPM / C 端接類型:Axial 工作溫度范圍: 尺寸:2.3 mm Dia. x 6.4 mm L 封裝:Bulk |
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