Features Fast read access time 90ns Dual voltage range operation Unregulated battery power supply range, 2.7V to 3.6V, or Standard power supply range, 5V 10% Compatible with JEDEC standard Atmel AT27C010 Low-power CMOS operation 20A max standby (less than 1A, typical) for V = 3.6V CC 29mW max active at 5MHz for V = 3.6V CC 1Mb (128K x 8) JEDEC standard package Unregulated 32-lead PLCC High-reliability CMOS technology Battery Voltage, 2,000V ESD protection One-time 200mA latchup immunity Programmable, Rapid programming algorithm 100s/byte (typical) CMOS- and TTL-compatible inputs and outputs Read-only Memory JEDEC standard for LVTTL and LVBO Integrated product identification code Industrial temperature range Atmel AT27BV010 Green (Pb/halide-free) packaging option 1. Description The Atmel AT27BV010 is a high-performance, low-power, low-voltage 1,048,576-bit, one- time programmable, read-only memory (OTP EPROM) organized as 128K by 8 bits. It requires only one supply in the range of 2.7V to 3.6V in normal read mode operation, mak- ing it ideal for fast, portable systems using either regulated or unregulated battery power. The innovative Atmel design techniques provide fast speeds that rival 5V parts, while keep- ing the low power consumption of a 3V supply. At V = 2.7V, any byte can be accessed in CC less than 90ns. With a typical power draw of only 18mW at 5MHz and V = 3V, the CC AT27BV010 consumes less than one-fifth the power of a standard, 5V EPROM. Standby mode supply current is typically less than 1A at 3V. The AT27BV010 simplifies system design and stretches battery lifetime even further by eliminating the need for power supply regulation. The AT27BV010 is available in an industry-standard, JEDEC-approved, one-time programmable (OTP) PLCC package. All devices feature two-line control (CE, OE) to give designers the flexibility to prevent bus contention. The AT27BV010 operating with V at 3.0V produces TTL-level outputs that are compatible CC with standard TTL logic devices operating at V = 5.0V. At V = 2.7V, the part is compati- CC CC ble with JEDEC-approved, low-voltage battery operation (LVBO) interface specifications. The device is also capable of standard, 5V operation, making it ideally suited for dual supply range systems or card products that are pluggable in both 3V and 5V hosts. The AT27BV010 has additional features to ensure high quality and efficient production use. The rapid programming algorithm reduces the time required to program the part and guar- antees reliable programming. Programming time is typically only 100s/byte. The integrated product identification code electronically identifies the device and manufacturer. 0344IEPROM4/11This feature is used by industry-standard programming equipment to select the proper programming algorithms and voltages. The AT27BV010 programs in exactly the same way as a standard, 5V AT27C010, and uses the same programming equipment. 2. Pin configurations 32-lead PLCC Pin name Function Top view A0 - A16 Addresses O0 - O7 Outputs CE Chip enable A7 5 29 A14 OE Output enable A6 6 28 A13 A5 7 27 A8 PGM Program strobe A4 8 26 A9 A3 9 25 A11 NC No connect A2 10 24 OE A1 11 23 A10 A0 12 22 CE O0 13 21 O7 3. System considerations Switching between active and standby conditions via the chip enable pin may produce transient voltage excursions. Unless accommodated by the system design, these transients may exceed datasheet limits, resulting in device non-conformance. At a minimum, a 0.1F, high-frequency, low inherent inductance, ceramic capacitor should be utilized for each device. This capacitor should be connected between the V and ground terminals of the device, as close to the device as possible. CC Additionally, to stabilize the supply voltage level on printed circuit boards with large EPROM arrays, a 4.7F bulk electrolytic capacitor should be utilized, again connected between the V and ground terminals. This capacitor should be positioned as CC close as possible to the point where the power supply is connected to the array. Figure 3-1. Block diagram 2 Atmel AT27BV010 0344IEPROM4/11 O1 14 4 A12 O2 15 3 A15 GND 16 2 A16 O3 17 1 VPP O4 18 32 VCC O5 19 31 PGM O6 20 30 NC