HM6264A Ver la hoja de datos (PDF) - Hitachi -> Renesas Electronics

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HM6264A

8192-word × 8-bit High Speed CMOS Static RAM

Hitachi -> Renesas Electronics 

HM6264A Series

Low VCC Data Retention

In data retention mode, CS2 controls the address,

WE, , CS1 OE, and the Din buffer. If CS2 controls

data retention mode, Vin (for these inputs) can be

in the high impedance state. If CS1 controls the

data retention mode, CS2 must satisfy either

HM6264A Series

CS2 ≥ VCC – 0.2 V or CS2 ≤ 0.2 V. The other

input levels (address, WE, OE, I/O) can be in the

high impedance state.

Low VCC Data Retention Characteristics (Ta = 0 to +70°C)

This characteristics is guaranteed only L/LL-version.

Parameter

Symbol Min Typ Max Unit Test Condition

VCC for data retention

VDR

2.0

—

—

V

CS1 ≥ VCC – 0.2 V,

CS2 ≥ VCC– 0.2 V, or

CS2 ≤ 0.2 V

Data retention current ICCDR

—

—

Chip deselect to data

t

CDR

0

retention time

1*1

50*1 µA

VCC = 3.0 V,

CS1 ≥ VCC – 0.2 V,

1*2

25*2

CS2 ≥ VCC – 0.2 V, or

0 V ≤ CS2 ≤ 0.2 V, 0 V ≤ Vin

—

—

ns

See retention waveform

Operation recovery time tR

tRC*3

—

—

ns

See retention waveform

Notes:

1. VIL min = –0.3 V, 20 µA max at Ta = 0 to 40°C. These characteristics are guaranteed only for

the L-version.

2. VIL min = –0.3 V, 10 µA max at Ta = 0 to 40°C. These characteristics are guaranteed only for

the LL-version.

3. tRC = Read cycle time.

Low VCC Data Retention Waveform (1) (CS1 Controlled)

tCDR

Data retention mode

tR

VCC

4.5 V

2.2 V

VDR

CS1

0V

CS1 ≥ VCC – 0.2 V

9

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