HM62256AFP-10T datasheet(8/11 Pages) HITACHI

Part #	HM62256AFP-10T

Description	32,768-word x 8-bit High Speed CMOS Static RAM

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Manufacturer	HITACHI [Hitachi Semiconductor]

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8 / 11 page

Read Timing Waveform (3) *3 *5 *6

Write Cycle

HM62256A-8

HM62256A-10

HM62256A-12

HM62256A-15

—————– —————– —————– —————–

Parameter

Symbol

Min

Max

Min

Max

Min

Max

Min

Max

Unit

Note

———————————————————————————————————————————————–

Write cycle time

tWC

85

—

100

—

120

—

150

—

ns

———————————————————————————————————————————————–

Chip selection to

tCW

75

—

80

—

85

—

100

—

ns

2

end of write

———————————————————————————————————————————————–

Address setup time

tAS

0—

ns

3

———————————————————————————————————————————————–

Address valid to

tAW

75

—

80

—

85

—

100

—

ns

end of write

———————————————————————————————————————————————–

Write pulse width

tWP

55

—

60

—

70

—

90

—

ns

1

———————————————————————————————————————————————–

Write recovery time

tWR

0—

ns

4

———————————————————————————————————————————————–

WE to output in high-Z tWHZ

0

30

0

35

0

40

0

50

ns

10

———————————————————————————————————————————————–

Data to write time

tDW

40

—

40

—

50

—

60

—

ns

overlap

———————————————————————————————————————————————–

Data hold from

tDH

0—

ns

write time

———————————————————————————————————————————————–

Output active from

tOW

5—

ns

10

end of write

———————————————————————————————————————————————–

Output disable to

tOHZ

0

30

0

35

0

40

0

50

ns

10, 11

output in high-Z

———————————————————————————————————————————————–

tACS

tCLZ

tCHZ

Dout

CS

Valid Data

*2

*1,*2

Notes: 1. tCHZ and tOHZ are defined as the time at which the outputs achieve the open circuit

conditions and are not referenced to output voltage levels.

2. This parameter is sampled and not 100% tested.

3.

WE is high for read cycle.

4. Device is continuously selected,

CS = VIL.

5. Address Valid prior to or coincident with

CS transition Low.

6.

OE = VIL.

8

HM62256A Series

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