参数资料
型号: SST89E54RD2A-40-C-NJE
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQCC44
封装: ROHS COMPLIANT, PLASTIC, MS-018AC, LCC-44
文件页数: 69/78页
文件大小: 1671K
代理商: SST89E54RD2A-40-C-NJE
Data Sheet
FlashFlex MCU
SST89E54RD2A/RDA / SST89E58RD2A/RDA
71
2008 Silicon Storage Technology, Inc.
S71339-02-000
02/08
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.
For example:
TAVLL = Time from Address Valid to ALE Low
TLLPL = Time from ALE Low to PSEN# Low
TLLWL
ALE Low to RD# or WR# Low
60
90
3TCLCL - 25 (3V)
3TCLCL - 15 (5V)
3TCLCL + 25 (3V)
3TCLCL + 15 (5V)
ns
TAVWL
Address to RD# or WR# Low
4TCLCL - 75 (3V)
ns
70
4TCLCL - 30 (5V)
ns
TWHQX
Data Hold After WR#
TCLCL - 27 (3V)
ns
5TCLCL - 20 (5V)
ns
TQVWH
Data Valid to WR# High
7TCLCL - 70 (3V)
ns
125
7TCLCL - 50 (5V)
ns
TQVWX
Data Valid to WR# High to Low
Transition
5TCLCL - 20
ns
TRLAZ
RD# Low to Address Float
0
ns
TWHLH
RD# to WR# High to ALE High
TCLCL - 25 (3V)
TCLCL + 25 (3V)
ns
10
40
TCLCL - 15 (5V)
TCLCL + 15 (5V)
ns
T14-7.0 1339
A: Address
Q: Output data
C: Clock
R: RD# signal
D: Input data
T: Time
H: Logic level HIGH
V: Valid
I:
Instruction (program memory contents)
W: WR# signal
L: Logic level LOW or ALE
X: No longer a valid logic level
P: PSEN#
Z: High Impedance (Float)
TABLE
14-7: AC Electrical Characteristics (Continued) (2 of 2)
TA = -40°C to +85°C, VDD = 4.5-5.5V@40MHz, VSS = 0V
Symbol
Parameter
Oscillator
Units
40 MHz (x1 Mode)
20 MHz (x2 Mode)
Variable
Min
Max
Min
Max
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