HM62256BLFP-4SLT 查看數據表（PDF） - Hitachi -> Renesas Electronics

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HM62256BLFP-4SLT

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

Hitachi -> Renesas Electronics 

HM62256B Series

AC Characteristics (Ta = 0 to +70°C, VCC = 5 V ± 10%, unless otherwise noted.)

Test Conditions

• Input pulse levels: 0.8 V to 2.4 V

• Input rise and fall times: 5 ns

• Input and output timing reference level: 1.5 V

• Output load: HM62256B-4: 1 TTL Gate + CL (30 pF)(Including scope & jig)

HM62256B-5: 1 TTL Gate + CL (50 pF)(Including scope & jig)

HM62256B-7/8: 1 TTL Gate + CL (100 pF)(Including scope & jig)

Read Cycle

HM62256B

-4

-5

-7

-8

Parameter

Symbol Min Max Min Max Min Max Min Max Unit Notes

Read cycle time

t RC

Address access time

t AA

Chip select access time

t ACS

Output enable to output valid

t OE

Chip selection to output in low-Z

t CLZ

Output enable to output in low-Z

t OLZ

Chip deselection in to output in

t CHZ

high-Z

45 — 55 — 70 — 85 — ns

— 45 — 55 — 70 — 85 ns

— 45 — 55 — 70 — 85 ns

30 — 35 — 40 — 45 ns

5 — 5 — 10 — 10 — ns

2

5 — 5 — 5 — 5 — ns

2

0 20 0 20 0 25 0 30 ns

1, 2

Output disable to output in high-Z tOHZ

0 20 0 20 0 25 0 30 ns

1, 2

Output hold from address change tOH

5 — 5 — 5 — 10 — ns

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

are not referred to output voltage levels.

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

7

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