PSD834F2-90M STMicroelectronics, PSD834F2-90M Datasheet - Page 74

• Manufacturer Part Number: PSD834F2-90M
• Description: IC FLASH 2MBIT 90NS 52QFP
• Manufacturer: STMicroelectronics

Specifications of PSD834F2-90M

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 2M (256K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 52-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2008

PSD813F2V, PSD854F2V
Table 37. Example of PSD Typical Power Calculation at V
74/109
Highest Composite PLD input frequency
MCU ALE frequency (Freq ALE)
Operational Modes
Number of product terms used
I
This is the operating power with no EEPROM WRITE or Flash memory Erase cycles in progress. Calculation is based
on I
CC
OUT
total
= 0mA.
(Freq PLD)
% Flash memory Access
% SRAM access
% I/O access
% Normal
% Power-down Mode
(from fitter report)
% of total product terms
Turbo Mode
Calculation (using typical values)
= 8 MHz
= 4 MHz
= 80%
= 15%
= 5% (no additional power above base)
= 10%
= 90%
= 45 PT
= 45/182 = 24.7%
= Off
= Ipwrdown x %pwrdown + %normal x (I
= Ipwrdown x %pwrdown + % normal x (%flash x 2.5mA/MHz x Freq ALE
= 50µA x 0.90 + 0.1 x (0.8 x 2.5mA/MHz x 4 MHz
= 45µA + 0.1 x (8 + 0.9 + 24)
= 45µA + 0.1 x 32.9
= 45µA + 3.29mA
= 3.34mA
Doc ID 10552 Rev 3
Conditions
+ %SRAM x 1.5mA/MHz x Freq ALE
+ % PLD x (from graph using Freq PLD))
+ 0.15 x 1.5mA/MHz x 4 MHz
+ 24mA)
CC
= 5.0V (Turbo Mode Off)
CC
(ac) + I
CC
(dc))