Key facts
- Brand
- Texas Instruments
- Model
- TMS27C256
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-01
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Texas Instruments TMS27C256/TMS27PC256 32768x8-Bit ROM Datasheet
The TMS27C256 and TMS27PC256 are 32768 by 8-bit read-only memories (ROMs) fabricated using power-saving CMOS technology. The TMS27C256 is an ultraviolet (UV) light erasable electrically programmable ROM (EPROM), while the TMS27PC256 is a one-time programmable (OTP) PROM. Both devices are pin compatible with existing 256K MOS ROMs, PROMs, and EPROMs and operate from a single 5-V power supply in read mode.
Read onlineTexas Instruments TMS27C256 specifications
| Technology | CMOS |
|---|---|
| Operating Voltage | 5 V |
| Programming Voltage | 13 V |
Source: Texas Instruments TMS27C256/TMS27PC256 32768x8-Bit ROM Datasheet
All Texas Instruments TMS27C256 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the signature code for these devices?
The signature code is 9704, where 97 is the manufacturer code and 04 is the device code.
From: Texas Instruments TMS27C256/TMS27PC256 32768x8-Bit ROM Datasheet
How long does the SNAP! Pulse programming take?
The nominal programming time is four seconds using a Vpp of 13 V and a Voc of 6.5 V.
From: Texas Instruments TMS27C256/TMS27PC256 32768x8-Bit ROM Datasheet
What is the signature code for these devices?
The signature code is 9704, where AO selects manufacturer code 97 and A0 high selects device code 04.
How long does it take to erase a TMS27C256?
A typical 12-mW/cm² filterless UV lamp erases the device in 21 minutes.