M27C160 STMICROELECTRONICS | Alldatasheet
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Technical content
16 Mbit (2Mb x 8 or 1Mb x 16) UV EPROM and OTP EPROM
■ 5V ± 10% SUPPLY VOLTAGE in READ OPERATION ■ ACCESS TIME: 50ns ■ BYTE-WIDE or WORD-WIDE CONFIGURABLE ■ 16 Mbit MASK ROM REPLACEMENT ■ LOW POWER CONSUMPTION – Active Current 70mA at 8MHz – Standby Current 100µA ■ PROGRAMMING VOLTAGE: 12.5V ± 0.25V ■ PROGRAMMING TIME: 50µs/word ■ ELECTRONIC SIGNATURE – Manufacturer Code: 20h – Device Code: B1h
DESCRIPTION
The M27C160 is a 16 Mbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for micro- processor systems requiring large data or program storage and is organised as either 2 Mbit words of 8 bit or 1 Mbit words of 16 bit. The pin-out is com- patible with a 16 Mbit Mask ROM. The FDIP42W (window ceramic frit-seal package) has a transparent lid which allows the user to ex- pose the chip to ultraviolet light to erase the bit pat- tern. A new pattern can then be written rapidly to the device by following the programming proce- dure. For applications where the content is programmed only one time and erasure is not required, the M27C160 is offered in PDIP42, SDIP42, PLCC44 and SO44 packages. FDIP42W (F) SO44 (M) PDIP42 (B) PLCC44 (K) SDIP42 (S) Figure 1. Logic Diagram
Figure 3. PLCC Connections
44 VSS
Figure 2. DIP Connections Figure 4. SO Connections Table 1. Signal Names
Table 2. Absolute Maximum Ratings(1)
- Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC
voltage on Output is VCC + 0 . 5 Vw i t hp o s s i b l eo v e r s h o o tt oVCC +2V for a period less than 20ns. Table 3. Operating Modes Note: X = VIH or VIL,VID = 12V ± 0.5V. Table 4. Electronic Signature Note: Outputs Q15-Q8 are set to '0'.
Table 7. Read Mode DC Characteristics(1) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
- Maximum DC voltage on Output is VCC +0.5V.
the inductive effects of PCB traces.
Table 8. Read Mode AC Characteristics(1) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
- Sampled only, not 100% tested.
- Speed obtained with High Speed AC measurement conditions.
Table 9. Read Mode AC Characteristics(1) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP.
- Sampled only, not 100% tested.
- Speed obtained with High Speed AC measurement conditions.
Figure 7. Word-Wide Read Mode AC Waveforms
Table 10. Programming Mode DC Characteristics(1) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP . Table 11. Programming Mode AC Characteristics(1) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
- Sampled only, not 100% tested.
The Electronic Signature (ES) mode allows the reading out of a binary code from an EPROM that will identify its manufacturer and type. This mode is intended for use by programming equipment to automatically match the device to be programmed with its corresponding programming algorithm. The ES mode is functional in the 25°C ± 5°C am- bient temperature range that is required when pro- gramming the M27C160. To activate the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of the M27C160, with V PP =V CC = 5V. Two identifier bytes may then be sequenced from the device out- puts by toggling address line A0 from VILto VIH.A l l other address lines must be held at VIL during Electronic Signature mode. Byte 0 (A0 = VIL) rep- resents the manufacturer code and byte 1 (A0 = VIH) the device identifier code. For the ST- Microelectronics M27C160, these two identifier bytes are given in Table 4 and can be read-out on outputs Q7 to Q0. ERASURE OPERATION (applies to UV EPROM) The erasure characteristics of the M27C160 is such that erasure begins when the cells are ex- posed to light with wavelengths shorter than ap- proximately 4000 Å. It should be noted that sunlight and some type of fluorescent lamps have wavelengths in the 3000-4000 Å range. Research shows that constant exposure to room level fluo- rescent lighting could erase a typical M27C160 in about 3 years, while it would take approximately 1 week to cause erasure when exposed to direct sunlight. If the M27C160 is to be exposed to these types of lighting conditions for extended periods of time, it is suggested that opaque labels be put over the M27C160 window to prevent unintentional era- sure. The recommended erasure procedure for M27C160 is exposure to short wave ultraviolet light which has a wavelength of 2537 Å. The inte- grated dose (i.e. UV intensity x exposure time) for erasure should be a minimum of 30 W-sec/cm The erasure time with this dosage is approximate- ly 30 to 40 minutes using an ultraviolet lamp with 12000 µW/cm 2 power rating. The M27C160 should be placed within 2.5cm (1 inch) of the lamp tubes during the erasure. Some lamps have a filter on their tubes which should be removed before erasure.
Table 12. Ordering Information Scheme Note: 1. High Speed, see AC Characteristics section for further information. vice, please contact the STMicroelectronics Sales Office nearest to you.
Table 13. Revision History
Table 14. FDIP42W - 42 pin Ceramic Frit-seal DIP, with window, Package Mechanical Data Figure 12. FDIP42W - 42 pin Ceramic Frit-seal DIP, with window, Package Outline
Table 15. PDIP42 - 42 pin Plastic Dual In Line, 600 mils width, Package Mechanical Data Figure 13. PDIP42 - 42 pin Plastic Dual In Line, 600 mils width, Package Outline
Table 16. SDIP42 - 42 pin Shrink Plastic DIP, 600 mils width, Package Mechanical Data Figure 14. SDIP42 - 42 pin Shrink Plastic DIP, 600 mils width, Package Outline
Table 17. PLCC44 - 44 lead Plastic Leaded Chip Carrier, Package Mechanical Data Figure 15. PLCC44 - 44 lead Plastic Leaded Chip Carrier, Package Outline
Table 18. SO44 - 44 lead Plastic Small Outline, 525 mils body width, Package Mechanical Data Figure 16. SO44 - 44 lead Plastic Small Outline, 525 mils body width, Package Outline
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is registered trademark of STMicroelectronics All other names are the property of their respective owners © 2002 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States