27C64 SYC | Alldatasheet
Document overview
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Technical content
64 Kbit (8Kb x 8) UV EPROM and OTP EPROM
5V ± 10% SUPPLY VOLTAGE in READ OPERATION FAST ACCESS TIME: 150ns LOW POWER “CMOS” CONSUMPTION: – Active Current 30mA – Standby Current 100µA PROGRAMMING VOLTAGE: 12.5V ± 0.25V HIGH SPEED PROGRAMMING (less than 1 minute) ELECTRONIC SIGNATURE – Manufacturer Code: 9Bh – Device Code: 08h
DESCRIPTION
The M27C64A is a 64Kbit 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 programs and is organized as 8,192 by 8 bits. The FDIP28W (window ceramic frit-seal package) has transparent lid which allows the user to expose the chip to ultraviolet light to erase the bit pattern. A new pattern can then be written to the device by following the programming procedure. For applications where the content is programmed only on time and erasure is not required, the M27C64A is offered in PLCC32 package. AI00834B A0-A12 P Q0-Q7 VPPVCC M27C64A G E VSS Figure 1. Logic Diagram Table 1. Signal Names
1 VPP
- Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than 20ns. Maximum DC
CC +0.5V with possible overshoot to VCC +2V for a period less than 20ns. Table 2. Absolute Maximum Ratings (1) control and should be used for device selection.
AVQV ) is equal to the delay from E to output (tELQV ). is required from a particular memory device. by the inductive effects of PCB traces. Table 3. Operating Modes Table 4. Electronic Signature
When delivered (and after each erasure for UV EPROM), all bits of the M27C64A are in the "1" state. Data is introduced by selectively program- ming "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. The only way to change a "0" to a "1" is by die exposition to ultra- violet light (UV EPROM). The M27C64A is in the programming mode when V pp input is at 12.5V, E is at VIL and P is pulsed to VIL. The data to be programmed is applied to 8 bits in parallel to the data output pins. The levels required for the ad- dress and data inputs are TTL. V CC is specified to be 6V ± 0.25V. High Speed Programming The high speed programming algorithm, described in the flowchart, rapidly programs the M27C64A using an efficient and reliable method, particularly suited to the production programming environ- ment. An individual device will take around 1 minute to program. Program Inhibit Programming of multiple M27C64A in parallel with different data is also easily accomplished. Except for E, all like inputs including G of the parallel M27C64A may be common. A TTL low level pulse applied to a M27C64A P input, with E low and VPP at 12.5V, will program that M27C64A. A high level E input inhibits the other M27C64A from being programmed. Program Verify A verify (read) should be performed on the pro- grammed bits to determine that they were correctly programmed. The verify is accomplished with E and G at VIL, P at VIH, VPP at 12.5V and VCC at 6V. 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 ambient temperature range that is required when program- ming the M27C64A. To activate the ES mode, the programming equipment must force 11.5V to 12.5V on address line A9 of the M27C64A, with V PP =VCC =5V. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from V IL to VIH. All other address lines must be held at VIL during Electronic Signa- ture mode. Byte 0 (A0=VIL) represents the manufacturer code and byte 1 (A0=VIH) the device identifier code. For the STMicroelectronics M27C64A, these two iden- tifier bytes are given in Table 4 and can be read-out on outputs Q0 to Q7. M27C64A
Notes:1. VCC must be applied simultaneously with or before VPP and removed simultaneously with or after VPP.
- Sampled only, not 100% tested.
Table 7. Read Mode AC Characteristics (1) Notes:1. VCC must be applied simultaneously with or before VPP and removed simultaneously with or after VPP .
- Maximum DC voltage on Output is VCC +0.5V.
Table 6. Read Mode DC Characteristics (1)
Note: 1. VCC must be applied simultaneously with or before VPP and removed simultaneously or after VPP . Table 8. Programming Mode DC Characteristics (1) Notes: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)
-15 150 ns -20 200 ns -25 250 ns -30 300 ns Package F FDIP28W C PLCC32 Temperature Range 1 0 to 70 °C 6 –40 to 85 °C Option X Additional Burn-in TR Tape & Reel Packing Example: M27C64A -15 C 1 TR ORDERING INFORMATION SCHEME For a list of available options (Speed, Package, etc...) refer to the current Memory Shortform catalogue. For further information on any aspect of this device, please contact the STMicroelectronics Sales Office nearest to you. M27C64A
A L B1 B e D S E1 E N C α eA eB Symb mm inches Typ Min Max Typ Min Max A 5.72 0.225 A1 0.51 1.40 0.020 0.055 A2 3.91 4.57 0.154 0.180 A3 3.89 4.50 0.153 0.177 B 0.41 0.56 0.016 0.022 C 0.23 0.30 0.009 0.012 D 36.50 37.34 1.437 1.470 E1 13.06 13.36 0.514 0.526 e2 . 5 4– – 0 . 1 0 0 – – eB 16.18 18.03 0.637 0.710 L 3.18 0.125 S 1.52 2.49 0.060 0.098 α 4° 11° 4° 11° N2 8 2 8 Drawing is no to scale FDIP28W - 28 pin Ceramic Frit-seal DIP, with window M27C64A
PLCC32 - 32 lead Plastic Leaded Chip Carrier - rectangular PLCC D Ne E1 E 1 N Nd CP B D2/E2 e A R 0.51 (.020) 1.14 (.045) F Symb mm inches Typ Min Max Typ Min Max A 2.54 3.56 0.100 0.140 A1 1.52 2.41 0.060 0.095 A2 – 0.38 – 0.015 B 0.33 0.53 0.013 0.021 B1 0.66 0.81 0.026 0.032 D 12.32 12.57 0.485 0.495 D1 11.35 11.56 0.447 0.455 D2 9.91 10.92 0.390 0.430 E 14.86 15.11 0.585 0.595 E1 13.89 14.10 0.547 0.555 E2 12.45 13.46 0.490 0.530 e1 . 2 7– – 0 . 0 5 0 – – F 0.00 0.25 0.000 0.010 N3 2 3 2 Nd 7 7 Ne 9 9 CP 0.10 0.004 Drawing is no to scale M27C64A