PSD4235G2-90UI STMicroelectronics, PSD4235G2-90UI Datasheet - Page 108

• Manufacturer Part Number: PSD4235G2-90UI
• Description: IC FLASH 4MBIT 90NS 80TQFP
• Manufacturer: STMicroelectronics

Specifications of PSD4235G2-90UI

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 4M (512K x 8)
• Speed: 90ns
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1969

DC and AC parameters
Table 55.
1. This is the operating power with no Flash memory Program or Erase cycles in progress. Calculation is based on I
108/129
MCU ALE frequency (Freq ALE)
I
CC
mA.
total
(Freq PLD)
% Flash memory Access
% SRAM access
% I/O access
% Normal
% Power-down Mode
(from fitter report)
% of total product terms
Turbo Mode
Example of PSD typical power calculation at V
Highest Composite PLD input frequency
Calculation (using typical values)
= 5% (no additional power above base)
= 45/193 = 23.3%
= 8 MHz
= 4 MHz
= 80%
= 15%
= 10%
= 90%
= 45 PT
= Off
= Ipwrdown x %pwrdown + %normal x (I
= Ipwrdown x %pwrdown + % normal x (%flash x 2.5 mA/MHz x Freq ALE
= 50µA x 0.90 + 0.1 x (0.8 x 2.5 mA/MHz x 4 MHz
= 45µA + 0.1 x (8 + 0.9 + 24)
= 45µA + 0.1 x 32.9
= 45µA + 3.29 mA
= 3.34 mA
Number of product terms used
Operational modes
Conditions
+ %SRAM x 1.5 mA/MHz x Freq ALE
+ % PLD x (from graph using Freq PLD))
+ 0.15 x 1.5 mA/MHz x 4 MHz
+ 24 mA)
CC
= 5.0V (with Turbo mode off)
CC
(ac) + I
CC
(dc))
PSD4235G2
OUT
(1)
= 0