M58WR016QT datasheet(16/110 Pages) NUMONYX

Part #	M58WR016QT

Description	16 Mbit and 32 Mbit (x16, Multiple Bank, Burst) 1.8V supply Flash memories

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Manufacturer	NUMONYX [Numonyx B.V]

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Signal descriptions

M58WR016QT, M58WR016QB, M58WR032QT, M58WR032QB

16/110

2.13

VPP Program supply voltage

VPP is a power supply pin. The Supply Voltage VDD and the Program Supply Voltage VPP

can be applied in any order. The pin can also be used as a control input.

The two functions are selected by the voltage range applied to the pin. If VPP is kept in a low

voltage range (0V to VDDQ) VPP is seen as a control input. In this case a voltage lower than

VPPLK gives an absolute protection against program or erase, while VPP in the VPP1 range

enables these functions (see Tables 19 and 20, DC Characteristics for the relevant values).

VPP is only sampled at the beginning of a program or erase; a change in its value after the

operation has started does not have any effect and program or erase operations continue.

If VPP is in the range of VPPH it acts as a power supply pin. In this condition VPP must be

stable until the Program/Erase algorithm is completed.

2.14

VSS Ground

VSS ground is the reference for the core supply. It must be connected to the system ground.

2.15

VSSQ Ground

VSSQ ground is the reference for the input/output circuitry driven by VDDQ. VSSQ must be

connected to VSS.

Note:

Each device in a system should have VDD, VDDQ and VPP decoupled with a 0.1µF ceramic

capacitor close to the pin (high frequency, inherently low inductance capacitors should be as

close as possible to the package). See Figure 9: AC measurement load circuit. The PCB

track widths should be sufficient to carry the required VPP program and erase currents.

Similar Part No. - M58WR016QT

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