m27w256 STMicroelectronics, m27w256 Datasheet
m27w256
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m27w256 Summary of contents
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... High Reliability CMOS Technology – 2,000V ESD Protection – 200 mA Latchup Protection Immunity Electronic Signature – Manufacturer Code: 20h – Device Code: 3dh ECOPACK® packages available April 2006 28 1 FDIP28W (F) PLCC32 (K) Rev 3 M27W256 28 1 PDIP28 (B) TSOP28 ( 13.4 mm 1/23 www.st.com 1 ...
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... DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 5.1 28-pin Ceramic Frit-seal DIP, with window (FDIP28WB 5.2 28-pin Plastic DIP, 600 mils width (PDIP28 5.3 32-lead Rectangular Plastic Leaded Chip Carrier (PLCC32 5.4 28-lead Plastic Thin Small Outline 13.4 mm (TSOP28 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/23 M27W256 ...
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... M27W256 List of tables Table 1. Signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 2. Operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 3. Electronic Signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Table 4. Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 5. Read Mode DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 6. Programming Mode DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Table 7. AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 8. Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 9. Read Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 10. Programming Mode AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Table 11. FDIP28WB package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 12 ...
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... Figure 5. Programming flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 6. AC Testing Input Output Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 7. AC Testing Load Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 8. Read Mode AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 9. Programming and Verify Modes AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 10. FDIP28WB package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Figure 11. PDIP28 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 12. PLCC32 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 13. TSOP28 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4/23 M27W256 ...
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... M27W256 1 Summary description The M27W256 is a low voltage 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 M27W256 operates in the read mode with a supply voltage as low as 3V. The decrease in operating power allows either a reduction of the size of the battery or an increase in the time between battery recharges ...
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... Supply Voltage Ground Not Connected Internally Don’t Use A12 2 27 A14 A13 A11 M27W256 A10 AI03627 M27W256 ...
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... Figure 3. LCC Connections Figure 4. TSOP Connections M27W256 A11 A9 A8 A13 A14 M27W256 A12 AI03628 Summary description A8 A9 A11 NC G A10 AI03626 A10 ...
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... The M27W256 has a standby mode which reduces the supply current from 10mA to 10µA with low voltage operation V The M27W256 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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... V use of the same PRESTO II algorithm. When delivered (and after each erasure for UV EPROM), all bits of the M27W256 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 M27W256s in parallel with different data is also easily accomplished. Except for E, all like inputs including G of the parallel M27W256 may be common. A TTL low level pulse applied to a M27W256's E input, with V program that M27W256. A high level E input inhibits the other M27W256s from being programmed ...
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... Research shows that constant exposure to room level fluorescent lighting could erase a typical M27W256 in about 3 years, while it would take approximately 1 week to cause erasure when exposed to direct sunlight. If the M27W256 exposed to these types of lighting conditions for extended periods of time suggested that opaque labels be put over the M27W256 window to prevent unintentional erasure ...
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... Depends on range. 3. 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. 12/23 (1) Parameter (2) M27W256 Value Unit –40 to 125 °C –50 to 125 °C –65 to 150 ° ...
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... M27W256 4 DC and AC parameters T = –40 to 85° Table 5. Read Mode DC Characteristics Symbol I Input Leakage Current LI I Output Leakage Current LO I Supply Current CC I Supply Current (Standby) TTL CC1 Supply Current (Standby) I CC2 CMOS I Program Current PP V Input Low Voltage IL (2) ...
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... Parameter (1) Parameter Test Condition High Speed 3V 0V Standard 2.4V 0.4V 1.3V 1N914 3.3k DEVICE UNDER TEST 30pF for High Speed 100pF for Standard C L includes JIG capacitance M27W256 High Speed Standard 10ns 20ns 0.4V to 2.4V 1.5V 0.8V and 2V Min. Max OUT 1.5V 2 ...
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... M27W256 T = – ° Table 9. Read Mode AC Characteristics Symbol Alt Parameter Address Valid AVQV ACC Output Valid Chip Enable Low ELQV CE Output Valid Output Enable Low t t GLQV OE to Output Valid Chip Enable High to ( EHQZ DF Output Hi-Z ...
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... V PP VALID DATA IN tEHQX tELEH tQXGL PROGRAM Test Condition Min. Max 105 2 2 100 0 130 DATA OUT tGLQV tGHQZ tGHAX VERIFY AI00759 M27W256 Unit µs µs µs µs µs µs µs µ ...
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... M27W256 5 Package mechanical data 5.1 28-pin Ceramic Frit-seal DIP, with window (FDIP28WB) Figure 10. FDIP28WB package outline Table 11. FDIP28WB package mechanical data Symbol 36. 13. 16. Ø millimeters Min Typ Max 5 ...
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... M27W256 PDIP inches Min Typ Max 0.1750 0.0248 0.1201 0.1500 0.1799 0.0177 0.0500 0.0091 0.0122 1.4402 1.4500 1.4598 1.3000 0.6000 ...
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... M27W256 5.3 32-lead Rectangular Plastic Leaded Chip Carrier (PLCC32) Figure 12. PLCC32 package outline E3 Table 13. PLCC32 package mechanical data Symbol 12.32 D1 11. 14.86 E1 13. millimeters Min Typ Max 3.18 3.56 1.53 2.41 0.38 – 0.33 0.53 0.66 0.81 0.10 12.57 11.51 4.78 5.66 7.62 15.11 14.05 6.05 6.93 10.16 1.27 0.00 0.13 0.89 32 Package mechanical data A1 A2 ...
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... DIE C TSOP-C millimeters Min Typ Max 1.250 0.200 1.150 0.270 0.210 0.100 13.600 11.900 – 0.550 – 8.100 0.700 0° 5° 28 M27W256 inches Min Typ Max 0.0492 0.0079 0.0374 0.0453 0.0067 0.0106 0.0039 0.0083 0.0039 0.5197 0.5354 0.4606 0.4685 – ...
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... These speeds are replaced by the 100 ns. 4. Packages option available on request. Please contact STMicroelectronics local Sales Office. 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. M27W256 (3) (4) = 3.0V to 3.6V. ...
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... July 1999 March 2000 30-Aug-2002 12-Apr-2006 22/23 Revision 1.1 New STMicroelectronics Logo 1.2 Programming Flowchart clarified 2.0 Document Template changed Package mechanical data clarified for PDIP28 2.1 PLCC32 (Table 13 ,Figure 3 Converted to new template. Added ECOPACK® information. M27W256 Changes (Figure 5) (Table 12), 12) and TSOP28 (Table 14, Figure 13) ...
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... M27W256 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...