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Part: M27V401-120K
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Datasheet: Download M27V401-120K datasheet File size : 45 kB
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M27V401
4 Mbit (512Kb x 8) Low Voltage UV EPROM and OTP EPROM
LOW VOLTAGE READ OPERATION: 3V to 3.6V FAST ACCESS TIME: 120ns LOW POWER CONSUMPTION: Active Current 15mA at 5MHz Standb y Current 20µA PROGRAMMING VOLTAGE: 12.75V ± 0.25V PROGRAMMING TIME: 100µs/byte (typical) ELECTRONIC SIGNATURE Manufacturer Code: 20h Device Code: 41h
32
32
1
1
FDIP32W (F)
PDIP32 (B)
PLCC32 (K)
DESCRIPTION The M27V401 is a low voltage 4 Mbit EPROM offered in the two range UV (ultra violet erase) and OTP (one time programmable). It is ideally suited for microprocessor systems requiring large data or program storage and is organised as 524,28 8 by 8 bits. The M27V401 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. The FDIP32W (window ceramic frit-seal package) has a transparent lid which allow the user to expose the chip to ultraviolet light to erase the bit pattern. A new pattern can t hen be written to the device by following the programming procedure. Table 1 . Signal Names
A0-A18 Q0-Q7 E G VPP VCC VSS May 1998 Address Inputs Data Outputs Chip Enable Output Enable Program Supply Supply Voltage Ground
T SOP32 (N) 8 x 20mm
Figure 1. Logic Diagram
VCC
VPP
19 A0-A18
8 Q0-Q7
E G
M27V401
VSS
AI00695B
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M27V401
Figure 2A. DIP Pin Connections Figure 2B. LCC Pin Connections
VPP A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 Q0 Q1 Q2 VSS
1 2 3 4 5 6 7 8 M27V401 9 10 11 12 13 14 15 16
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
VCC A18 A17 A14 A13 A8 A9 A11 G A10 E Q7 Q6 Q5 Q4 Q3
A7 A6 A5 A4 A3 A2 A1 A0 Q0
A 12 A 15 A 16 VPP VCC A 18 A 17 1 32 A14 A13 A8 A9 A11 G A10 E Q7 9 M27V401 25 17 Q1 Q2 VSS Q3 Q4 Q5 Q6
AI00696
AI01861
Figure 2C. TSOP Pin Connections
A11 A9 A8 A13 A14 A17 A18 VCC VPP A16 A15 A12 A7 A6 A5 A4
1
32
8 9
M27V401 (Normal)
25 24
16
17
AI01156B
G A10 E Q7 Q6 Q5 Q4 Q3 VSS Q2 Q1 Q0 A0 A1 A2 A3
DESCRIPTION (cont'd) For applications where the content is programmed only one time and erasure is not required, the M27 V20 1 is off e red in PD I P32, PLCC32 and TSOP32 (8 x 20 mm) packages. DEVICE OPERATION The operating modes of the M27V401 are listed in the Operating Modes table. A single power supply is required in the read mode. All inputs are TTL levels except for VPP and 12V on A9 f or Electronic Signature. Read Mode The M27V401 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 t he output pins, independen t of device selection. Assuming that the addresses are stable, the address access time (tAVQV) is equal to the delay from E t o output (tELQV). Data is available at the output after a delay of tGLQV from the f alling edge of G, assuming that E has been low and the addresses have been stable for at least t AVQV-tGLQV.
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M27V401
Table 2. Absolute Maximum Ratings ( 1)
Symbol TA TBIAS TSTG VIO ( 2) V CC VA9 (2) VPP Parameter Am bient Operating Temperature (3) Temperature Under Bias Storage Temperature Input or Output Voltages (except A9) Supply Voltage A9 Voltage Program Supply Voltage Value 40 to 125 50 to 125 65 to 150 2 to 7 2 to 7 2 to 13.5 2 to 14 U nit °C °C °C V V V V
N otes: 1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum R atings" may c ause permanent damage t o the device. These are stress ratings only and operation of the device at these or any other conditions above those indic ated i n the Operating sections of this s pecification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. 2. Minimum DC v oltage on Input or Output is 0.5V with possible undershoot to 2.0V for a peri od less t han 20ns. Maximum DC voltage on Output is VCC +0.5V with possible overshoot to VCC +2V for a period less t han 20ns. 3. Depends on range.
Table 3. Operating Modes
Mode R ead Output Disable Program Verify Program Inhibit Standby Electronic Signature
N ote: X = VIH or VIL, VID = 12V ± 0.5V
E VIL VIL VI L Pulse VIH VIH VIH VIL
G VIL VIH VIH VIL VIH X VIL
A9 X X X X X X VI D
VPP VCC or VSS VCC or VSS VPP VPP VPP VCC or VSS VCC
Q0 - Q7 Data Out H i-Z D ata In Data Out H i-Z H i-Z C odes
Table 4 . Electronic Signature
Identifier Manufacturer's Code Device Code A0 VIL VIH Q7 0 0 Q6 0 1 Q5 1 0 Q4 0 0 Q3 0 0 Q2 0 0 Q1 0 0 Q0 0 1 Hex Data 20h 41h
Standby Mode The M27V401 has a standby mode which reduces the supply current from 15mA to 20µA with low voltage operation VCC 3.6V, see Read Mode DC
Characteristics Table for details. The M27V401 is placed in the standby mode by applying a CMOS high signal to the E input. When in t he standby mode, the outputs are in a high impedance state, independent of the G input.
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