UPD43257BCZ-85L Renesas Electronics America, UPD43257BCZ-85L Datasheet - Page 13

• 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

Write Cycle Timing Chart 3 (CE2 Controlled)
Cautions 1. During address transition, at least one of pins /CE1, CE2, /WE should be inactivated.
Remark
Address (Input)
2. When I/O pins are in the output state, therefore the input signals must not be applied
Write operation is done during the overlap time of a low level /CE1, /WE and a high level CE2.
/CE1 (Input)
CE2 (Input)
/WE (Input)
I/O (Input)
to the output.
High impedance
t
AS
Data Sheet M10693EJ9V0DS
t
AW
t
WC
t
t
CW1
WP
t
CW2
t
DW
Data in
t
t
WR
DH
impedance
High
μ
PD43257B
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