UPD43257BCZ-85L Renesas Electronics America, UPD43257BCZ-85L Datasheet - Page 9

• Manufacturer Part Number: UPD43257BCZ-85L
• Manufacturer: Renesas Electronics America

Specifications of UPD43257BCZ-85L

• Density: 256Kb
• Access Time (max): 85ns
• Sync/async: Asynchronous
• Architecture: Not Required
• Clock Freq (max): Not RequiredMHz
• Operating Supply Voltage (typ): 5V
• Address Bus: 15b
• Package Type: PDIP
• Operating Temp Range: 0C to 70C
• Number Of Ports: 1
• Supply Current: 45mA
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 28
• Word Size: 8b
• Number Of Words: 32K
• Lead Free Status / Rohs Status: Not Compliant

Read Cycle
Notes 1. See the output load shown in Figure 1.
Remark These AC characteristics are in common regardless of package types and L, LL versions.
Read Cycle Timing Chart
Remark
Read cycle time
Address access time
/CE1 access time
CE2 access time
Output hold from address change
/CE1 to output in low impedance
CE2 to output in low impedance
/CE1 to output in high impedance
CE2 to output in high impedance
2. See the output load shown in Figure 2.
Address (Input)
In read cycle, /WE should be fixed to high level.
Parameter
/CE1 (Input)
I/O (Output)
CE2 (Input)
Symbol
t
t
t
t
t
t
t
t
t
CO1
CO2
HZ1
HZ2
LZ1
LZ2
RC
OH
AA
High impedance
Data Sheet M10693EJ9V0DS
MIN.
70
10
10
10
μ
PD43257B-70
t
AA
t
t
LZ1
LZ2
t
t
CO1
CO2
t
RC
MAX.
70
70
70
30
30
MIN.
85
10
10
10
μ
PD43257B-85
Data out
MAX.
85
85
85
30
30
t
t
t
HZ1
HZ2
OH
Unit
μ
ns
ns
ns
ns
ns
ns
ns
ns
ns
PD43257B
Condition
Note 1
Note 2
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