JPS647398A - Prom integrated circuit - Google Patents
Prom integrated circuitInfo
- Publication number
- JPS647398A JPS647398A JP16375087A JP16375087A JPS647398A JP S647398 A JPS647398 A JP S647398A JP 16375087 A JP16375087 A JP 16375087A JP 16375087 A JP16375087 A JP 16375087A JP S647398 A JPS647398 A JP S647398A
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- circuit
- diodes
- readout
- write
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Read Only Memory (AREA)
Abstract
PURPOSE:To prevent a leakage current to a write circuit at readout by inserting plural diodes connected in cascade between a write circuit and a data terminal used in common for write/readout so as to bring the anode to a data terminal and the cathode to a write circuit side. CONSTITUTION:Two diodes D1, D2 connected in cascade are inserted between a data terminal 10 and a write circuit 1 while the anode is connected to the terminal 10 side and the cathode is connected to the circuit 1 side. When a power voltage VCC connected to a point A via a resistor R is lower than the applied voltage VOUT at the terminal 10, the diodes D1, D2 are not turned on. That is, no leakage current flows from the terminal 10 to the circuit 1 regardless of the quantity of the impedance in the circuit 1 and it is possible to apply normal readout. The number of diodes is not limited to two but the number has only to be determined in response to the level difference between the point A and the terminal 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16375087A JPS647398A (en) | 1987-06-29 | 1987-06-29 | Prom integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16375087A JPS647398A (en) | 1987-06-29 | 1987-06-29 | Prom integrated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS647398A true JPS647398A (en) | 1989-01-11 |
Family
ID=15779983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16375087A Pending JPS647398A (en) | 1987-06-29 | 1987-06-29 | Prom integrated circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS647398A (en) |
-
1987
- 1987-06-29 JP JP16375087A patent/JPS647398A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS55115729A (en) | Mos transistor circuit | |
| JPS5685934A (en) | Control signal generating circuit | |
| JPS5786190A (en) | Semiconductor device | |
| JPS5418664A (en) | Semiconductor switch | |
| JPS54140843A (en) | Dynamic memory | |
| JPS57104325A (en) | Ecl circuit | |
| JPS5518155A (en) | Power amplifier | |
| JPS647398A (en) | Prom integrated circuit | |
| JPS5571000A (en) | Memory unit | |
| JPS5753892A (en) | Prom protecting circuit for misinsertion of prom writer | |
| JPS55147827A (en) | Signal extracting circuit | |
| JPS5483381A (en) | Detection method of integrated circuit insertion direction | |
| KR870001256Y1 (en) | Reset circuit | |
| JPS57107618A (en) | Power amplifier | |
| JPS54137944A (en) | Signal processing circuit | |
| JPS57119514A (en) | Flip-flop circuit | |
| JPS5536748A (en) | Voltage comparing circuit | |
| JPS6442850A (en) | On-chip substrate voltage generating circuit | |
| JPS5616311A (en) | Transistor circuit | |
| JPS56116130A (en) | Voltage stabilizing circuit | |
| JPS5526709A (en) | Amplifier circuit | |
| JPS5490942A (en) | Integrated circuit unit | |
| JPS55131822A (en) | Constant-voltage circuit | |
| JPS55142253A (en) | Detecting circuit for fault in electric power source | |
| JPS5679318A (en) | Memory backup circuit |