MX27L2000
FEATURES
•256Kx 8 organization
•Wide power supply range, 2.7V DC to 3.6V DC
•+12.5V programming voltage
•Fast access time: 120/150/200/250 ns
•Totally static operation
•Completely TTL compatible
•Operating current:20mA @ 3.6V, 5MHz
GENERAL DESCRIPTION
The MX27L2000 is a 3V only, 2M-bit, One Time Programmable Read Only Memory. It is organized as 256K words by 8 bits per word, operates from a single + 3 volt supply, has a static standby mode, and features fast single address location programming. All programming signals are TTL levels, requiring a single pulse. For programming outside from the system, existing EPROM
2M-BIT [256Kx8] CMOS EPROM
•Standby current: 20uA
•Package type:
-32 pin plastic DIP
-32 pin SOP
-32 pin PLCC
-8x20mm 32-lead TSOP(I)
-8x14mm 32-lead TSOP(I)
-8x13.4mm 32-lead TSOP(I)
programmers may be used. The MX27L2000 supports a intelligent fast programming algorithm which can result in programming time of less than one minute.
This EPROM is packaged in industry standard 32 pin dual-in-line packages, 32 lead SOP and 32 lead PLCC and 32 lead TSOP(I) packages.
PIN CONFIGURATIONS
32 PDIP/SOP |
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32 PLCC |
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VCC |
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VPP |
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VCC |
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A12 |
A15 |
A16 |
VPP |
NC |
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A17 |
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A16 |
2 |
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PGM |
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A15 |
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A17 |
A7 |
4 |
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1 |
32 |
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A14 |
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A12 |
4 |
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A14 |
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A6 |
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A13 |
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A7 |
5 |
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A13 |
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MX27L2000 |
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A6 |
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A8 |
A5 |
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A8 |
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A5 |
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A9 |
A4 |
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A9 |
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A4 |
8 |
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A11 |
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A3 |
9 |
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MX27L2000 |
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A11 |
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A3 |
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24 |
OE |
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A2 |
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A10 |
A2 |
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OE |
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A1 |
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CE |
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A1 |
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A10 |
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A0 |
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Q7 |
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A0 |
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CE |
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Q0 |
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Q6 |
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Q0 |
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Q7 |
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Q1 |
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Q5 |
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14 |
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Q2 |
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Q4 |
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15 |
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Q1 |
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GND |
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Q6 |
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GND |
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Q3 |
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32 TSOP(I) (8x20mm,8x14mm,8x13.4mm) |
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A11 |
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1 |
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32 |
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OE |
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A9 |
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A10 |
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A8 |
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3 |
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CE |
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A13 |
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Q7 |
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A14 |
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Q6 |
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A17 |
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Q5 |
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Q4 |
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PGM |
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VCC |
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8 |
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MX27L2000 |
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25 |
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Q3 |
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VPP |
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GND |
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A16 |
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Q2 |
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A15 |
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Q1 |
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A12 |
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Q0 |
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A7 |
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A0 |
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A6 |
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A1 |
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A5 |
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A2 |
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A4 |
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A3 |
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BLOCK DIAGRAM
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CE |
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CONTROL |
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OUTPUT |
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Q0~Q7 |
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PGM |
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LOGIC |
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BUFFERS |
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Y-DECODER |
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Y-SELECT |
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A0~A17 |
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2M BIT |
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ADDRESS |
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X-DECODER |
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CELL |
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INPUTS |
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MAXTRIX |
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VCC |
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VSS |
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PIN DESCRIPTION |
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SYMBOL |
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PIN NAME |
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A0~A17 |
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Address Input |
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Q0~Q7 |
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Data Input/Output |
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Chip Enable Input |
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Output Enable Input |
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Programmable Enable Input |
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PGM |
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VPP |
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Program Supply Voltage |
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NC |
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No Internal Connection |
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VCC |
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Power Supply Pin (+5V) |
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GND |
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Ground Pin |
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P/N: PM0372 |
1 |
REV. 2.9, JAN. 22, 2002 |
MX27L2000
FUNCTIONAL DESCRIPTION
THE PROGRAMMING OF THE MX27L2000
When the MX27L2000 is delivered, or it is erased, the chip has all 2M bits in the "ONE" or HIGH state. "ZEROs" are loaded into the MX27L2000 through the procedure of programming.
For programming, the data to be programmed is applied with 8 bits in parallel to the data pins.
Vcc must be applied simultaneously or before Vpp, and removed simultaneously or after Vpp. When programming an MXIC EPROM, a 0.1uF capacitor is required across Vpp and ground to suppress spurious voltage transients which may damage the device.
FAST PROGRAMMING
The device is set up in the fast programming mode when the programming voltage VPP = 12.75V is applied, with VCC = 6.25 V and PGM = VIH (Algorithm is shown in Figure 1). The programming is achieved by applying a single TTL low level 100us pulse to the PGM input after addresses and data line are stable. If the data is not verified, an additional pulse is applied for a maximum of 25 pulses. This process is repeated while sequencing through each address of the device. When the programming mode is completed, the data in all address is verified at VCC = VPP = 5V ± 10%.
PROGRAM INHIBIT MODE
Programming of multiple MX27L2000s in parallel with different data is also easily accomplished by using the Program Inhibit Mode. Except for CE and OE, all like inputs of the parallel MX27L2000 may be common. A TTL low-level program pulse applied to an MX27L2000 CE input with VPP = 12.5 ± 0.5 V and PGM LOW will program that MX27L2000. A high-level CE input inhibits the other MX27L2000s from being programmed.
PROGRAM VERIFY MODE
Verification should be performed on the programmed bits to determine that they were correctly programmed. The verification should be performed with OE and CE, at VIL, PGM at VIH, and VPP at its programming voltage.
AUTO IDENTIFY MODE
The auto identify mode allows the reading out of a binary code from an EPROM that will identify its manufacturer and device type. This mode is intended for use by programming equipment for the purpose of automatically matching the device to be programmed with its corresponding programming algorithm. This mode is functional in the 25°C ± 5°C ambient temperature range that is required when programming the MX27L2000.
To activate this mode, the programming equipment must force 12.0 ±0.5 V on address line A9 of the device. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from VIL to VIH. All other address lines must be held at VIL during auto identify mode.
Byte 0 ( A0 = VIL) represents the manufacturer code, and byte 1 (A0 = VIH), the device identifier code. For the MX27L2000, these two identifier bytes are given in the Mode Select Table. All identifiers for manufacturer and device codes will possess odd parity, with the MSB (Q7) defined as the parity bit.
READ MODE
The MX27L2000 has two control functions, both of which must be logically satisfied in order to obtain data at the outputs. Chip Enable (CE) is the power control and should be used for device selection. Output Enable (OE) is the output control and should be used to gate data to the output pins, independent of device selection. Assuming that addresses are stable, address access time (tACC) is equal to the delay from CE to output (tCE). Data is available at the outputs tQE after the falling edge of OE, assuming that CE has been LOW and addresses have been stable for at least tACC - tQE.
STANDBY MODE
The MX27L2000 has a CMOS standby mode which reduces the maximum VCC current to 100 uA. It is placed in CMOS standby when CE is at VCC ± 0.3 V. The MX27L2000 also has a TTL-standby mode which reduces the maximum VCC current to 1.5 mA. It is placed in TTL-standby when CE is at VIH. When in standby mode, the outputs are in a high-impedance state, independent of the OE input.
P/N: PM0372 |
REV. 2.9, JAN. 22, 2002 |
2
MX27L2000
TWO-LINE OUTPUT CONTROL FUNCTION
To accommodate multiple memory connections, a twoline control function is provided to allow for:
1.Low memory power dissipation,
2.Assurance that output bus contention will not occur.
It is recommended that CE be decoded and used as the primary device-selecting function, while OE be made a common connection to all devices in the array and connected to the READ line from the system control bus. This assures that all deselected memory devices are in their low-power standby mode and that the output pins are only active when data is desired from a particular memory device.
SYSTEM CONSIDERATIONS
During the switch between active and standby conditions, transient current peaks are produced on the rising and falling edges of Chip Enable. The magnitude of these transient current peaks is dependent on the output capacitance loading of the device. At a minimum, a 0.1 uF ceramic capacitor (high frequency, low inherent inductance) should be used on each device between Vcc and GND to minimize transient effects. In addition, to overcome the voltage drop caused by the inductive effects of the printed circuit board traces on EPROM arrays, a 4.7 uF bulk electrolytic capacitor should be used between VCC and GND for each eight devices. The location of the capacitor should be close to where the power supply is connected to the array.
MODE SELECT TABLE
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PINS |
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MODE |
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A0 |
A9 |
VPP |
OUTPUTS |
CE |
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OE |
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PGM |
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Read |
VIL |
VIL |
X |
X |
X |
VCC |
DOUT |
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Output Disable |
VIL |
VIH |
X |
X |
X |
VCC |
High Z |
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Standby (TTL) |
VIH |
X |
X |
X |
X |
VCC |
High Z |
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Standby (CMOS) |
VCC±0.3V |
X |
X |
X |
X |
VCC |
High Z |
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Program |
VIL |
VIH |
VIL |
X |
X |
VPP |
DIN |
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Program Verify |
VIL |
VIL |
VIH |
X |
X |
VPP |
DOUT |
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Program Inhibit |
VIH |
X |
X |
X |
X |
VPP |
High Z |
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Manufacturer Code(3) |
VIL |
VIL |
X |
VIL |
VH |
VCC |
C2H |
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Device Code(3) |
VIL |
VIL |
X |
VIH |
VH |
VCC |
20H |
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NOTES:
1.VH = 12.0 V ± 0.5 V
2.X = Either VIH or VIL
3.A1 - A8 = A10 - A17 = VIL(For auto select)
4.See DC Programming Characteristics for VPP voltage during programming.
P/N: PM0372 |
REV. 2.9, JAN. 22, 2002 |
3
MX27L2000
FIGURE 1. FAST PROGRAMMING FLOW CHART
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START |
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ADDRESS = FIRST LOCATION |
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VCC = 6.25V |
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VPP = 12.75V |
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X = 0 |
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PROGRAM ONE 100us PULSE |
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INTERACTIVE |
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INCREMENT X |
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SECTION |
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YES |
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X = 25? |
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NO |
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FAIL |
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VERIFY BYTE |
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? |
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PASS |
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NO |
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INCREMENT ADDRESS |
LAST ADDRESS |
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FAIL |
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YES |
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VCC = VPP = 5.25V |
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VERIFY SECTION |
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FAIL |
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DEVICE FAILED |
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VERIFY ALL BYTES |
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? |
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PASS |
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DEVICE PASSED |
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P/N: PM0372 |
REV. 2.9, JAN. 22, 2002 |
4
MX27L2000
SWITCHING TEST CIRCUITS
DEVICE |
1.8K ohm |
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UNDER |
+5V |
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TEST |
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CL |
DIODES = IN3064 |
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OR EQUIVALENT |
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6.2K ohm |
CL = 100 pF including jig capacitance (30pF for MX27L2000-120, 150ns)
SWITCHING TEST WAVEFORMS
2.0V |
2.0V |
AC driving levels |
TEST POINTS |
0.8V |
0.8V |
INPUT |
OUTPUT |
AC TESTING: AC driving levels are 3.0V/0V for both commercial grade and industrial grade.
Input pulse rise and fall times are < 10ns.
AC driving levels |
1.5V |
TEST POINTS |
1.5V |
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INPUT |
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OUTPUT |
AC TESTING: (1) AC driving levels are 3.0V/0V for commercial grade and industrial grade.
Input pulse rise and fall times are < 10ns.
(2) For MX27L2000-12/15.
P/N: PM0372 |
REV. 2.9, JAN. 22, 2002 |
5
MX27L2000
ABSOLUTE MAXIMUM RATINGS
RATING |
VALUE |
Ambient Operating Temperature -40oC to 85oC |
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Storage Temperature |
-65oC to 125oC |
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Applied Input Voltage |
-0.5V to 7.0V |
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Applied Output Voltage |
-0.5V to VCC+0.5V |
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VCC to Ground Potential |
-0.5V to 7.0V |
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V9 & VPP |
-0.5V to 13.5V |
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DC/AC Operating Conditions for Read Operation
NOTICE:
Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended period may affect reliability.
NOTICE:
Specifications contained within the following tables are subject to change.
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MX27L2000 |
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-12- |
15 |
-20 |
-25 |
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Operating Temperature |
Commercial |
0°C to 70°C |
0°C to 70°C |
0°C to 70°C |
0°C to 70°C |
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Industrial |
- |
- |
-40°C to 85°C |
-40°C to 85°C |
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Vcc Power Supply |
2.7V to 3.6V |
2.7V to 3.6V |
2.7V to 3.6V |
2.7V to 3.6V |
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DC CHARACTERISTICS
SYMBOL |
PARAMETER |
MIN. |
MAX. |
UNIT |
CONDITIONS |
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VOH |
Output High Voltage |
2.4 |
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V |
IOH = -0.4mA, VCC=3.0V |
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VOL |
Output Low Voltage |
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0.4 |
V |
IOL = 2.1mA, VCC=3.0V |
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VIH |
Input High Voltage |
2.0 |
VCC + 0.5 |
V |
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VIL |
Input Low Voltage |
-0.3 |
0.8 |
V |
2.7V < VCC < 3.6V |
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ILI |
Input Leakage Current |
-10 |
10 |
uA |
VIN = 0 to 3.6V |
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ILO |
Output Leakage Current |
-10 |
10 |
uA |
VOUT = 0 to 5.5V |
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ICC3 |
VCC Power-Down Current |
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20 |
uA |
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= VCC ± 0.3V |
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CE |
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ICC2 |
VCC Standby Current |
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0.25 |
mA |
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= VIH |
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CE |
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ICC1 |
VCC Active Current |
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20 |
mA |
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= VIL, f=5MHz, Iout = 0mA, |
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CE |
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VCC=3.6V |
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IPP |
VPP Supply Current Read |
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10 |
uA |
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CE |
= |
OE |
= VIL, VPP = VCC |
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CAPACITANCE TA = 25oC, f = 1.0 MHz (Sampled only)
SYMBOL |
PARAMETER |
TYP. |
MAX. |
UNIT |
CONDITIONS |
CIN |
Input Capacitance |
8 |
12 |
pF |
VIN = 0V |
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COUT |
Output Capacitance |
8 |
12 |
pF |
VOUT = 0V |
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CVPP |
VPP Capacitance |
18 |
25 |
pF |
VPP = 0V |
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P/N: PM0372 |
|
6 |
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REV. 2.9, JAN. 22, 2002 |
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