PSD4235G2-90U STMicroelectronics, PSD4235G2-90U Datasheet - Page 119

• 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

PSD4235G2
Figure 45. WRITE timing
Table 68.
t
t
t
t
t
t
t
t
t
t
Symbol
LVLX
AVLX
LXAX
AVWL
SLWL
DVWH
WHDX
WLWH
WHAX1
WHAX2
NON-MULTIPLEXED
NON-MULTIPLEXED
MULTIPLEXED
ALE or AS Pulse Width
Address setup time
Address Hold time
Address Valid to Leading
Edge of WR
CS Valid to Leading edge of WR
WR Data setup time
WR Data Hold time
WR Pulse Width
Trailing edge of WR to Address Invalid
Trailing edge of WR to DPLD Address
Invalid
ADDRESS
WRITE timing
ALE/ AS
DATA
BUS
BUS
BUS
R / W
A /D
(DS)
CSI
WR
E
Parameter
t AVLX
t AVPV
ADDRESS
VALID
t SLWL
t AVWL
t LVLX
ADDRESS
t LXAX
VALID
ADDRESS OUT
Conditions
(1)(2)
(2)(3)
(2)(4)
(1)
(1)
(2)
(2)
(2)
(2)
t THEH
t WLWH
t EHEL
Min
15
12
25
28
4
7
8
4
6
0
t WLMV
-70
t DVWH
Max
VALID
VALID
DATA
DATA
t WHPV
DC and AC parameters
Min
20
15
15
35
35
t WHAX
6
8
5
8
0
t WHDX
-90
t ELTL
MCU I/O OUT
STANDARD
Max
AI02896
119/129
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns