M27C256B-15C6 STMicroelectronics, M27C256B-15C6 Datasheet
M27C256B-15C6
Specifications of M27C256B-15C6
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M27C256B-15C6 Summary of contents
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... Active Current 30mA at 5MHz – Standby Current 100µA Programming voltage: 12.75V ± 0.25V Programming time: 100µs/Word Electronic signature – Manufacturer Code: 20h – Device Code: 8Dh ECOPACK® packages available May 2006 28 1 FDIP28W ( PDIP28 (B) PLCC32 (C) Rev 2 M27C256B 1/24 www.st.com 1 ...
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... Two-line output control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.4 System considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.5 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.6 PRESTO II programming algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.7 Program inhibit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.8 Program Verify . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.9 Electronic signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.10 Erasure operation (applies for UV EPROM Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 6 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2/24 M27C256B ...
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... M27C256B List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 3. Electronic signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 4. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 5. AC measurement conditions Table 6. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 7. Read mode DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 8. Programming mode DC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 9. Read mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 10. Read mode AC characteristics Table 11. Programming mode AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Table 12. FDIP28WB - 28 pin Ceramic Frit-seal DIP, with window (round 0.280" ...
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... Read mode AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 8. Programming and Verify modes AC waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 9. FDIP28WB - 28 pin Ceramic Frit-seal DIP, with window, package outline . . . . . . . . . . . . . 19 Figure 10. PDIP28 - 28 pin Plastic DIP, 600 mils width, package outline . . . . . . . . . . . . . . . . . . . . . . 20 Figure 11. PLCC32 - 32 pin Rectangular Plastic Leaded Chip Carrier, package outline 4/24 M27C256B ...
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... M27C256B 1 Summary description The M27C256B is a 256 Kbit EPROM offered in the two ranges UV (ultra violet erase) and OTP (one time programmable ideally suited for microprocessor systems and is organized as 32,768 by 8 bits. The FDIP28W (window ceramic frit-seal package) has a transparent lid which allows the user to expose the chip to ultraviolet light to erase the bit pattern ...
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... Summary description Table 1. Signal names A0-A14 Q0- Figure 2. DIP connections 6/24 Address Inputs Data Outputs Chip Enable Output Enable Program Supply Supply Voltage Ground Not Connected Internally Don’t Use A12 2 27 A14 A13 A11 M27C256B A10 AI00756 M27C256B ...
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... M27C256B Figure 3. LCC connections M27C256B AI00757 Summary description A8 A9 A11 NC G A10 7/24 ...
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... Standby mode The M27C256B has a standby mode which reduces the supply current from 30mA to 100µA. The M27C256B is placed in the standby mode by applying a CMOS high signal to the E input. When in the standby mode, the outputs are in a high impedance state, independent of the G input. ...
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... Programming When delivered (and after each erasure for UV EPROM), all bits of the M27C256B are in the "1" state. Data is introduced by selectively programming "0"s into the desired bit locations. Although only "0"s will be programmed, both "1"s and "0"s can be present in the data word. ...
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... Program inhibit Programming of multiple M27C256Bs in parallel with different data is also easily accomplished. Except for E, all like inputs including G of the parallel M27C256B may be common. A TTL low level pulse applied to a M27C256B's E input, with V program that M27C256B. A high level E input inhibits the other M27C256Bs from being programmed ...
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... Research shows that constant exposure to room level fluorescent lighting could erase a typical M27C256B in about 3 years, while it would take approximately 1 week to cause erasure when exposed to direct sunlight. If the M27C256B exposed to these types of lighting conditions for extended periods of time suggested that opaque labels be put over the M27C256B window to prevent unintentional erasure ...
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... Depends on range. 2. 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 V than 20ns. 12/24 Parameter (1) +0.5V with possible overshoot M27C256B Value Unit –40 to 125 °C –50 to 125 °C –65 to 150 °C – – ...
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... M27C256B 4 DC and AC parameters This section summarizes the operating and measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC Characteristic tables that follow are derived from tests performed under the Measurement Conditions summarized in the relevant tables. Designers should check that the operating conditions in their circuit match the measurement conditions when relying on the quoted parameters ...
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... OUT > and removed simultaneously or after V PP +0.5V. CC OUT C L AI01823B Min Max OUT Min Max V ± ±10 OUT – 0.2V 100 100 CC –0 2.1mA = –1mA 3.6 = –100µA V – 0. ± ± 10 M27C256B Unit pF pF Unit µA µ µA µ ...
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... M27C256B Table 8. Programming mode DC characteristics Symbol I Input Leakage Current LI I Supply Current CC I Program Current PP V Input Low Voltage IL V Input High Voltage IH V Output Low Voltage OL V Output High Voltage TTL Voltage ° 6.25V ± 0.25V must be applied simultaneously with or before V ...
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... Speed obtained with High Speed AC measurement conditions. 4. Sampled only, not 100% tested. 16/24 VALID tAVQV tGLQV tELQV (1) (2) Test Parameter -45 Condition Min Max Min Max Min Max Min Max and removed simultaneously or after V PP VALID tAXQX tEHQZ tGHQZ M27C256B (3) -60 -70 - ± ± 10 M27C256B Hi-Z AI00758B Unit ...
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... V must be applied simultaneously with or before Sampled only, not 100% tested. (1) (2) Test Parameter -90 Condition Min Max Min Max Min Max Min Max and AC parameters M27C256B -10 -12 -15/-20/-25 90 100 120 90 100 120 ± ± 10 and removed simultaneously or after V Unit 150 ...
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... Output Enable High to Output Hi-Z Output Enable High to Address Transition = 12.75V ± 0.25V DATA OUT tGLQV tGHQZ tGHAX tQXGL VERIFY (1) (2) Test Min Condition and removed simultaneously or after V M27C256B AI00759 Max Unit µs µs µs µs 105 µs µs µs 100 ns 130 ...
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... M27C256B 5 Package mechanical Figure 9. FDIP28WB - 28 pin Ceramic Frit-seal DIP, with window, package outline 1. Drawing is not to scale. Table 12. FDIP28WB - 28 pin Ceramic Frit-seal DIP, with window (round 0.280"), package mechanical data Symbol millimeters Typ Min Max 5.72 0.51 1.40 3.91 4.57 3.89 4.50 ...
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... PDIP inches Typ Min 0.1750 0.0248 0.1500 0.1201 0.0177 0.0500 0.0091 1.4500 1.4402 1.3000 – 0.6000 0.5402 0.5000 0.1000 – 0.5906 0.5827 0.5984 0.1299 0.070 0° 28 M27C256B Max 0.1799 0.0122 1.4598 – 0.5701 – 0.5984 0.6567 0.082 10° ...
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... M27C256B Figure 11. PLCC32 - 32 pin Rectangular Plastic Leaded Chip Carrier, package outline E3 1. Drawing is not to scale. Table 14. PLCC32 - 32 pin Rectangular Plastic Leaded Chip Carrier, package mechanical data Symbol millimeters Typ Min Max 3.17 3.56 1.53 2.41 0.38 – 0.33 0.53 0.66 0.81 ...
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... Options TR = Tape & Reel Packing 1. High Speed, see AC Characteristics section for further information. For a list of available options (Speed, Package, etc) or for further information on any aspect of this device, please contact the STMicroelectronics Sales Office nearest to you. 22/24 M27C256B - M27C256B 1 TR ...
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... M27C256B 7 Revision history Table 16. Document revision history Date Version July 1998 20-Sep-2000 29-Nov-2000 02-Apr-2001 29-Aug-2002 18-May-2006 1.0 First Issue 1.1 AN620 Reference removed 1.2 PLCC codification changed 1.3 FDIP28W mechanical dimensions changed Package mechanical data clarified for PDIP28 1.4 PLCC32 (Table 14 ...
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