PSD511B1-C-90UI 查看數據表（PDF） - STMicroelectronics

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PSD511B1-C-90UI

Low Cost Field Programmable Microcontroller Peripherals

STMicroelectronics 

PSD5XX Family

15.0

Pin

Capacitance

16.0

AC Testing

TA = 25 °C, f = 1 MHz

Symbol

Parameter 1

Conditions Typical2 Max Unit

CIN

Capacitance (for input pins only)

VIN = 0 V

4

COUT Capacitance (for input/output pins)

VOUT = 0 V

8

CVPP Capacitance (for WR/VPP or R/W/VPP) VPP = 0 V

18

6 pF

12 pF

25 pF

NOTES: 1. These parameters are only sampled and are not 100% tested.

2. Typical values are for TA = 25°C and nominal supply voltages.

Figure 63. AC Testing Input/Output Waveform

3.0V

0V

TEST POINT

1.5V

Figure 64. AC Testing Load Circuit

DEVICE

UNDER TEST

2.01 V

195 Ω

CL = 30 pF

(INCLUDING

SCOPE AND JIG

CAPACITANCE)

17.0

Erasure and

Programming

134

To clear all locations of their programmed contents, expose the window packaged device

to an ultra-violet light source. A dosage of 30 W second/cm2 is required (40 W second/cm2

for ZPSD5XXV versions). This dosage can be obtained with exposure to a wavelength of

2537 Å and intensity of 12000 µW/cm2 for 40 to 45 minutes (55 to 60 minutes for

ZPSD5XXV versions). The device should be about 1 inch from the source, and all filters

should be removed from the UV light source prior to erasure.

The PSD5XX and similar devices will erase with light sources having wavelengths shorter

than 4000 Å. Although the erasure times will be much longer than with UV sources at 2537

Å, exposure to fluorescent light and sunlight eventually erases the device. For maximum

system reliability, these sources should be avoided. If used in such an environment, the

package windows should be covered by an opaque substance.

Upon delivery from WSI, or after each erasure, the PSD5XX device has all bits in the PAD

and EPROM in the “1” or high state. The configuration bits are in the “0” or low state. The

code, configuration, and PAD MAP data are loaded through the procedure of programming

Information for programming the device is available directly from WSI. Please contact your

local sales representative.

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