M27V160_06 STMICROELECTRONICS | Alldatasheet
Document overview
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- PDF pages: 25
Technical content
Datasheet sections
- 1 Summary description
- 2 Device description
- 2.1 Read mode
- 2.2 Standby mode
- 2.3 Two-line output control
- 2.4 System considerations
- 2.5 Programming
- 2.6 Presto III programming algorithm
- 2.7 Program Inhibit
- 2.8 Program Verify
- 2.9 Electronic Signature
- 2.10 Erasure operation (applies to UV EPROM)
- 3 Maximum ratings
- 4 DC and AC parameters
- 5 Package mechanical data
- 6 Part Numbering
- 7 Revision history
Features
■ 3V to 3.6V Low Voltage in Read Operation ■ Access Time: 100 ns ■ Byte-wide or Word-wide Configurable ■ 16 Mbit Mask ROM Replacement ■ Low Power Consumption – Active Current: 30 mA at 8 MHz – Standby Current: 60 µA ■ Programming Voltage: 12.5V ± 0.25V ■ Programming Time: 50 µs/word ■ Electronic Signature – Manufacturer Code: 20h – Device Code: B1h ■ ECOPACK® packages available FDIP42W (F) PDIP42 (B) SDIP42 (S) PLCC44 (K) SO44 (M)
1 Summary description
Mbit words of 16 bit. The pin-out is compatible with a 16 Mbit Mask ROM. time between battery recharges. written rapidly to the device by following the programming procedure. required, the M27V160 is offered in PDIP42, SDIP42, PLCC44 and SO44 packages. ECOPACK is an ST trademark. ECOPACK® specifications are available at: www.st.com. signals connected to this device. Figure 1. Logic Diagram
Figure 2. DIP Connections Table 1. Signal descriptions
Figure 3. SO Connections Figure 4. PLCC Connections
44 VSS
2 Device description
2.1 Read mode
selected and with A–1 at VIH the upper 8 bits of the 16 bit data are selected. been stable for at least tAVQV -tGLQV .
2.2 Standby mode
Table 2. Operating Modes (1)
M27V160 Device description E input. When in the standby mode, the outputs are in a high impedance state, independent of the G input.
2.3 Two-line output control
Because EPROMs are usually used in larger memory arrays, this product features a 2 line control function which accommodates the use of multiple memory connection. The two line control function allows:
- the lowest possible memory power dissipation,
- complete assurance that output bus contention will not occur. For the most efficient use of these two control lines, E should be decoded and used as the primary device selecting function, while G should be made a common connection to all devices in the array and connected to the READ line from the system control bus. This ensures that all deselected memory devices are in their low power standby mode and that the output pins are only active when data is required from a particular memory device.
2.4 System considerations
The power switching characteristics of Advanced CMOS EPROMs require careful decoupling of the supplies to the devices. The supply current I CC has three segments of importance to the system designer: the standby current, the active current and the transient peaks that are produced by the falling and rising edges of E. The magnitude of the transient current peaks is dependent on the capacitive and inductive loading of the device outputs. The associated transient voltage peaks can be suppressed by complying with the two line output control and by properly selected decoupling capacitors. It is recommended that a 0.1µF ceramic capacitor is used on every device between V CC and VSS . This should be a high frequency type of low inherent inductance and should be placed as close as possible to the device. In addition, a 4.7µF electrolytic capacitor should be used between V CC and VSS for every eight devices. This capacitor should be mounted near the power supply connection point. The purpose of this capacitor is to overcome the voltage drop caused by the inductive effects of PCB traces.
2.5 Programming
The M27V160 has been designed to be fully compatible with the M27C160. As a result the M27V160 can be programmed as the M27C160 on the same programming equipments applying 12.75V on V PP and 6.25V on VCC by the use of the same PRESTO III algorithm. When delivered (and after each erasure for UV EPROM), all bits of the M27V160 are in the '1' state. Data is introduced by selectively programming '0's to 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 exposure to ultraviolet light (UV EPROM). The M27V160 is in the programming mode when V pp input is at 12.5V, G is at VIH and E is pulsed to VIL. The data to be programmed is applied to 16 bits in parallel to the data output pins. The levels required for the address and data inputs are TTL. VCC is specified to be 6.25V ± 0.25V.
2.6 Presto III prog ramming algorithm
margin to each programmed cell. Figure 5. Programming Flowchart
2.7 Program Inhibit
2.8 Program Verify
2.9 Electronic Signature
have the same identifier bytes.
2.10 Erasure operation (applies to UV EPROM)
- The erasure time with this dosage is approximately
have a filter on their tubes which should be removed before erasure. Table 3. Electronic Signature
3 Maximum ratings
Table 4. Absolute Maximum Ratings (1)
- Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute
- Minimum DC voltage on Input or Output is –0.5V with possible undershoot to –2.0V for a period less than
4 DC and AC parameters
Table 5. Read Mode DC Characteristics (1)
- V CC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
- Maximum DC voltage on Output is VCC +0.5V.
Table 6. Programming Mode DC Characteristics (1)
- V CC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
Table 9. Read Mode AC Characteristics (1)
- V CC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
- Speed obtained with High Speed measurement conditions.
- Sampled only, not 100% tested.
Table 10. Programming Mode AC Characteristics (1)
- V CC must be applied simultaneously with or before VPP and removed simultaneously or after VPP .
- Sampled only, not 100% tested.
5 Package mechanical data
Figure 12. FDIP42WB package outline Table 11. FDIP42WB package mechanical data
Figure 13. PDIP42 package outline Table 12. PDIP42 package mechanical data
Figure 14. SDIP42 package outline Table 13. SDIP42 package mechanical data
Figure 15. PLCC44 package outline Table 14. PLCC44 package mechanical data
Figure 16. SO44 package outline Table 15. SO44 package mechanical data
6 Part Numbering
Table 16. Ordering Information Scheme aspect of this device, please contact the STMicroelectronics Sales Office nearest to you.
- High Speed, see AC Characteristics section for further information.
- Packages option available on request. Please contact STMicroelectronics local Sales Office.
7 Revision history
Table 17. Document revision history Converted to new template. Added ECOPACK® information.