SST89E564-40-C-PI View Datasheet(PDF) - Silicon Storage Technology

Part Name

Description

MFG CO.

SST89E564-40-C-PI

Flash flex 51 MCU

Silicon Storage Technology 

FlashFlex51 MCU

SST89E564 / SST89V564 / SST89E554 / SST89V554

Preliminary Specifications

TABLE

Symbol

TQVWH

TRLAZ

TWHLH

10-5: AC ELECTRICAL CHARACTERISTICS (CONTINUED) (2 OF 2)

Tamb = 0°C TO +70°C OR -40°C TO +85°C, VDD = 2.7-3.6 @25MHZ, 4.5-5.5 @ 40MHZ, VSS = 0

Oscillator

25MHz

40MHz

Variable

Parameter

Data Valid to WR# High

RD# Low to Address Float

Min Max Min Max

433

125

0

0

Min

7TCLCL - 70 (3V)

7TCLCL - 50 (5V)

Max

Units

ns

ns

0

ns

RD# to WR# High to ALE High

43 123

10 40

TCLCL - 25 (3V)

TCLCL - 15 (5V)

TCLCL + 25 (3V)

TCLCL + 15 (5V)

ns

ns

T10-5.5 384

10.5 AC Characteristics

Explanation of Symbols Each timing symbol has 5 characters. The first character is always a ‘T’ (stands for

time). The other characters, depending on their positions, stand for the name of a signal or the logical status of that

signal. The following is a list of all the characters and what they stand for.

A: Address

C: Clock

D: Input data

H: Logic level HIGH

I: Instruction (program memory contents)

L: Logic level LOW or ALE

P: PSEN#

Q: Output data

R: RD# signal

T: Time

V: Valid

W: WR# signal

X: No longer a valid logic level

Z: High Impedance (Float)

For example:

TAVLL = Time from Address Valid to ALE Low

TLLPL = Time from ALE Low to PSEN# Low

VIHT

VHT

VILT

VLT

384 ILL F28a.2

AC Inputs during testing are driven at VIHT (VDD -0.5V) for Logic "1" and

VILT (0.45V) for a Logic "0". Measurement reference points for inputs and

outputs are at VHT (0.2VDD + 0.9) and VLT (0.2VDD - 0.1)

Note: VHT- VHIGH Test

VLT- VLOW Test

VIHT-VINPUT HIGH Test

VILT- VINPUT LOW Test

VLOAD +0.1V

VLOAD

VLOAD -0.1V

Timing Reference

Points

VOH -0.1V

VOL +0.1V

384 ILL F28b.0

For timing purposes a port pin is no longer floating when a 100 mV

change from load voltage occurs, and begins to float when a 100 mV

change from the loaded VOH/VOL level occurs. IOL/IOH = ± 20mA.

FIGURE 10-5: AC TESTING INPUT/OUTPUT, FLOAT WAVEFORM

©2001 Silicon Storage Technology, Inc.

52

S71181-03-000 9/01 384

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