PD2435(2006) 查看數據表（PDF） - OSRAM GmbH
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PD2435
(Rev.:2006)
(Rev.:2006)
OSRAM GmbH
PD2435 Datasheet PDF : 14 Pages
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PD243X, PD353X, PD443X
Timing Characteristics—Data “Write” Cycle
Timing Characteristics—Data “Read” Cycle
CE0, CE1
TCES
TCEH
2.0 V
0.8 V *
CE0, CE1
TCES
TCEH
2.0 V
0.8 V *
A0, A1
D0–D6
RD
WR
2.0 V
0.8 V *
A0–A3
TAS
TAH
TDS
TDH
2.0 V
0.8 V *
D0–D6
2.0 V
0.8 V *
TRS
TRH
WR
2.0 V
RD
0.8 V *
TW
TACC
TAS
TAH
DATA OUT
TDD
TDH
TRI
TWS
TWH
TR
TRACC
2.0 V
0.8 V *
2.0 V
0.8 V *
2.0
0.8
V
V
*
2.0
0.8
V
V
*
Notes:
1. Wait 1.0 µs between any Reads or Writes after writing a Control
Word with a Clear (D7=1). Wait 1.0 µs between any Reads or
Writes after Clearing a Control Word with a Clear (D7=0). All
other Reads and Writes can be back to back.
2. All input voltages are VIL=0.8 V, VIH=2.0 V.
Switching Specifications (VCC=4.5 V)
Write Cycle Timing
Para- Description
meter
Specification Minimum
–40°C 25°C 85°C Units
TCLR(1) Clear RAM
1.0
TCLRD(1) Clear RAM Disable 1.0
TAS
Address Setup
10
TCES
Chip Enable Setup 0
TRS
Read Enable Setup 10
TDS
Data Setup
20
TW
Write Pulse
60
TAH
Address Hold
20
TDH
Data Hold
20
TCEH
Chip Enable Hold 0
TRH
Read Enable Hold 20
TACC
Total Access
90
Time = Setup
Time + Write
Time + Hold Time
1.0 1.0 µs
1.0 1.0 µs
10 10 ns
0
0
ns
10 10 ns
30 50 ns
70 90 ns
30 40 ns
30 40 ns
0
0
ns
30 40 ns
110 140 ns
3. These waveforms are not edge triggered.
4. Data out voltages are measured with 100 pF on the data bus
and the ability to source = –40 mA and sink=1.6 mA The rise and
fall times are 60 ns. VOL=0.4 V, VOH=2.4 V.
Switching Specifications (VCC=4.5 V)
Read Cycle Timing
Para- Description
meter
Specification Minimum
–40°C 25°C 85°C Units
TAS
TCES
TWS
TDD
TR
TAH
TDH
TTRI
Address Setup
0
Chip Enable
0
Write Enable Setup 20
Data Delay Time 100
Read Pulse
150
Address Hold
0
Data Hold
0
Time to Tristate
30
(Max. time)
0
0
ns
0
0
ns
30 40 ns
150 175 ns
175 200 ns
0
0
ns
0
0
ns
40 50 ns
TCEH
Chip Enable Hold 0
TWH
Write Enable Hold 30
TACC
Total Access
200
Time = Setup
Time + Read
Time + Time to
Tristate
TWAIT (1) Wait Time between 0
Reads
0
0
ns
40 50 ns
245 290 ns
0
0
ns
2006-01-23
6
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