27C2001 SYC | Alldatasheet
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Technical content
2 Mbit (256Kb x 8) UV EPROM and OTP EPROM
n 5V ± 10% SUPPLY VOLTAGE in READ OPERATION n FAST ACCESS TIME: 55ns n LOW POWER CONSUMPTION: – Active Current 30mA at 5MHz – Standby Current 100µA n PROGRAMMING VOLTAGE: 12.75V ± 0.25V n PROGRAMMING TIME: 100 µs/byte (typical) n ELECTRONIC SIGNATURE – Manufacturer Code: 20h – Device Code: 61h
DESCRIPTION
The M27C2001 is a high speed 2 Mbit EPROM of- fered in the two ranges UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for microprocessor systems requiring large pro- grams and is organised as 262,144 by 8 bits. The FDIP32W (window ceramic frit-seal package) and LCCC32W (leadless chip carrier package) have a transparent lids which allow the user to ex- pose the chip to ultraviolet light to erase the bit pat- tern. A new pattern can then be written to the device by following the programming procedure. For applications where the content is programmed only one time and erasure is not required, the M27C2001 is offered in PDIP32, PLCC32 and TSOP32 (8 x 20 mm) packages. Figure 1. Logic Diagram Table 1. Signal Names
Figure 2B. LCC Pin Connections AI00718 A17 A10 P
1 A16
32 VPP
G E VSS Figure 2A. DIP Pin Connections A13 A10 A14 A11 G E Q5Q1 Q3VSS A17 PA16 A12 VPP VCC A15 AI00717 M27C20018 The operationg modes of the M27C2001 are listed in the Operating Modes table. A single power sup- ply is required in the read mode. All inputs are TTL levels except for V PP and 12V on A9 for Electronic Signature. Read Mode The M27C2001 has two control functions, both of which must be logically active in order to obtain data at the outputs. Chip Enable (E) is the power control and should be used for device selection. Output Enable (G) is the output control and should be used to gate data to the output pins, indepen- dent of device selection. Assuming that the ad- dresses are stable, the address access time AVQV ) is equal to the delay from E to output (tELQV ). Data is available at the output after a delay of tGLQV from the falling edge of G, assuming that E has been low and the addresses have been sta- ble for at least tAVQV -tGLQV . Standby Mode The M27C2001 has a standby mode which reduc- es the supply current from 30mA to 100µA. The M27C2001 is placed in the standby mode by ap- plying a CMOS high signal to the E input. When in the standby mode, the outputs are in a high imped- ance state, independent of the G input. Figure 2C. TSOP Pin Connections A4 A3 A13 A10 A14 A11 G E A17 P A16 A12 VPP VCC A15 AI01153B M27C2001 (Normal) 16 17 VSS
Table 2. Absolute Maximum Ratings
- 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 +0.5V with possible overshoot to VCC +2V for a period less than 20ns. Table 3. Operating Modes Note: X = VIH or VIL,V ID = 12V ± 0.5V. Table 4. Electronic Signature
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.
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
- Sampled only, not 100% tested.
- In case of 45ns speed see High Speed AC measurament conditions.
Figure 5. Read Mode AC Waveforms Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
- Sampled only, not 100% tested.
Table 9. Programming Mode AC Characteristics(1) Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP . Table 10. 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 M27C2001 can be directly programmed in the application circuit. See the relevant Application Note AN620. Electronic Signature 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 M27C2001. To activate the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of the M27C2001 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. All other address lines must be held at VIL during Electronic Signature mode. Byte 0 (A0=VIL) repre- sents the manufacturer code and byte 1 (A0=VIH) the device identifier code. For the STMicroelec- tronics M27C2001, these two identifier bytes are given in Table 4 and can be read-out on outputs Q0 to Q7. ERASURE OPERATION (applies to UV EPROM) The erasure characteristics of the M27C2001 are 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. Data shows that constant exposure to room level fluo- rescent lighting could erase a typical M27C2001 in about 3 years, while it would take approximately 1 week to cause erasure when exposed to direct sunlight. If the M27C2001 is to be exposed to these types of lighting conditions for extended pe- riods of time, it is suggested that opaque labels be put over the M27C2001 window to prevent unin- tentional erasure. The recommended erasure pro- cedure for the M27C2001 is exposure to short wave ultraviolet light which has wavelength of 2537 Å. The integrated dose (i.e. UV intensity x exposure time) for erasure should be a minimum of 15 W-sec/cm 2. The erasure time with this dos- age is approximately 15 to 20 minutes using an ul- traviolet lamp with 12000µW/cm 2 power rating. The M27C2001 should be placed within 2.5 cm (1 inch) of the lamp tubes during the erasure. Some lamps have a filter on their tubes which should be removed before erasure.
Table 11. Ordering Information Scheme Note: 1. High Speed, see AC Characteristics section for further information. vice, please contact the ST Sales Office nearest to you.
Table 12. FDIP32W - 32 pin Ceramic Frit-seal DIP, with window, Package Mechanical Data Figure 8. FDIP32W - 32 pin Ceramic Frit-seal DIP, with window, Package Outline
Table 13. PDIP32 - 32 lead Plastic DIP, 600 mils width, Package Mechanical Data Figure 9. PDIP32 - 32 lead Plastic DIP, 600 mils width, Package Outline
Table 14. LCCC32W - 32 lead Leadless Ceramic Chip Carrier, with window, Package Mechanical Data Figure 10. LCCC32W - 32 lead Leadless Ceramic Chip Carrier, with window, Package Outline
Table 15. PLCC32 - 32 lead Plastic Leaded Chip Carrier, rectangular, Package Mechanical Data Figure 11. PLCC32 - 32 lead Plastic Leaded Chip Carrier, rectangular, Package Outline
Figure 12. TSOP32 - 32 lead Plastic Thin Small Outline, 8 x 20mm, Package Outline Table 16. TSOP32 - 32 lead Plastic Thin Small Outline, 8 x 20mm, Package Mechanical Data