PSD4235G2-90U STMicroelectronics, PSD4235G2-90U Datasheet - Page 106

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

Specifications of PSD4235G2-90U

• 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: 0°C ~ 70°C
• Package / Case: 80-TQFP, 80-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-1968

DC and AC parameters
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DC and AC parameters
These tables describe the AD and DC parameters of the PSD4235G2:
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●
The parameters in the DC and AC Characteristic tables that follow are derived from tests
performed under the Measurement Conditions summarized in the relevant tables. Designers
should check that the operating conditions in their circuit match the measurement conditions
when relying on the quoted parameters.
The following are issues concerning the parameters presented:
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●
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Figure 34. PLD I
DC Electrical Specification
AC timing Specification
–
–
In the DC specification the supply current is given for different modes of operation.
Before calculating the total power consumption, determine the percentage of time that
the PSD is in each mode. Also, the supply power is considerably different if the Turbo
bit is 0.
The AC power component gives the PLD, Flash memory, and SRAM mA/MHz
specification.
Terms (PT) used.
In the PLD timing parameters, add the required delay when Turbo bit is 0.
PLD timing
Combinatorial timing
Synchronous clock mode
Asynchronous clock mode
Input macrocell timing
MCU timing
READ timing
WRITE timing
Peripheral mode timing
Power-down and Reset timing
110
100
Figure 34
CC
90
80
70
60
50
40
30
20
10
0
0
/frequency consumption
Vcc = 5V
TURBO ON (100%)
show the PLD mA/MHz as a function of the number of Product
5
HIGHEST COMPOSITE FREQUENCY AT PLD INPUTS (MHz)
TURBO OFF
10
TURBO OFF
15
PT 100%
TURBO ON (25%)
20
PT 25%
AI05739
25
PSD4235G2