NEC PD43256B DATA SHEET

μ

查询UPD43256BGU-70L-A供应商

DATA SHEET

MOS INTEGRATED CIRCUIT

PD43256B

256K-BIT CMOS STATIC RAM

32K-WORD BY 8-BIT

Description

The μPD43256B is a high speed, low power, and 262,144 bits (32,768 words by 8 bits) CMOS static RAM.

Battery backup is available. And A and B versions are wide voltage operations.

The μPD43256B is packed in 28-pin PLASTIC DIP, 28-pin PLASTIC SOP and 28-pin PLASTIC TSOP (I) (8 x 13.4 mm).

Features

• 32,768 words by 8 bits organization

• Fast access time: 70, 85, 100, 120, 150 ns (MAX.)

• Low voltage operation (A version: VCC = 3.0 to 5.5 V, B version: VCC = 2.7 to 5.5 V)

• Low VCC data retention: 2.0 V (MIN.)

• /OE input for easy application

Part number Access time Operating supply Operating ambient Supply current

ns (MAX.) voltage temperature At operating At standby At data retention

μ

V °C mA (MAX.)

μ

PD43256B-xxL

μ

PD43256B-xxLL

μ

PD43256B-Axx

μ

PD43256B-Bxx

Notes 1. TA ≤ 40 °C, VCC = 3.0 V

2. Access time: 85 ns (MAX.) (V

Note2

70, 85 4.5 to 5.5 0 to 70 45 50 3

Note2

85, 100

, 120

100, 120, 150 2.7 to 5.5

Note2

3.0 to 5.5

CC = 4.5 to 5.5 V)

15 2

A (MAX.) μA (MAX.)

Note1

The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.

Not all products and/or types are available in every country. Please check with an NEC Electronics
sales representative for availability and additional information.

Document No. M10770EJEV0DS00 (14th edition)
Date Published June 2006 NS CP (K)
Printed in Japan

1990, 1993, 1994

μ

PD43256B

Ordering Information (1/2)

Part number Package Access time Operating supply Operating ambient Remark

ns (MAX.) voltage temperature

V °C

μ

PD43256BCZ-70L

μ

PD43256BCZ-85L

μ

PD43256BCZ-70LL

μ

PD43256BCZ-85LL

μ

PD43256BGU-70L

μ

PD43256BGU-85L

μ

PD43256BGU-70LL

μ

PD43256BGU-85LL

μ

PD43256BGU-A85

μ

PD43256BGU-A10

μ

PD43256BGU-A12

28-pin PLASTIC DIP 70 4.5 to 5.5 0 to 70 L version

(15.24 mm (600)) 85

70 LL version

85

28-pin PLASTIC SOP 70 L version

(11.43 mm (450)) 85

70 LL version

85

85 3.0 to 5.5 A version

100

120

μ

PD43256BGU-B10

μ

PD43256BGU-B12

μ

PD43256BGW-70LL-9JL

μ

PD43256BGW-85LL-9JL

μ

PD43256BGW-A85-9JL

μ

PD43256BGW-A10-9JL

μ

PD43256BGW-A12-9JL

μ

PD43256BGW-B10-9JL

μ

PD43256BGW-B12-9JL

μ

PD43256BGW-B15-9JL

μ

PD43256BGW-70LL-9KL

μ

PD43256BGW-85LL-9KL

μ

PD43256BGW-A85-9KL

μ

PD43256BGW-A10-9KL

μ

PD43256BGW-A12-9KL

μ

PD43256BGW-B10-9KL

μ

PD43256BGW-B12-9KL

100 2.7 to 5.5 B version

120

28-pin PLASTIC TSOP (I) 70 4.5 to 5.5 LL version

(8x13.4) (Normal bent) 85

85 3.0 to 5.5 A version

100

120

100 2.7 to 5.5 B version

120

150

28-pin PLASTIC TSOP (I) 70 4.5 to 5.5 LL version

(8x13.4) (Reverse bent) 85

85 3.0 to 5.5 A version

100

120

100 2.7 to 5.5 B version

120

μ

PD43256BGW-B15-9KL

2

150

Data Sheet M10770EJEV0DS

μ

PD43256B

(2/2)

Part number Package Access time Operating supply Operating ambient Remark

ns (MAX.) voltage temperature

V °C

μ

PD43256BGU-70L-A

μ

PD43256BGU-85L-A

μ

PD43256BGU-70LL-A

μ

PD43256BGU-85LL-A

μ

PD43256BGU-A85-A

μ

PD43256BGU-A10-A

μ

PD43256BGU-A12-A

μ

PD43256BGU-B10-A

μ

PD43256BGU-B12-A

μ

PD43256BGW-70LL-9JL-A

μ

PD43256BGW-85LL-9JL-A

28-pin PLASTIC SOP 70 4.5 to 5.5 0 to 70 L version

(11.43 mm (450)) 85

70 LL version

85

85 3.0 to 5.5 A version

100

120

100 2.7 to 5.5 B version

120

28-pin PLASTIC TSOP (I) 70 4.5 to 5.5 LL version

(8x13.4) (Normal bent) 85

μ

PD43256BGW-A85-9JL-A

μ

PD43256BGW-A10-9JL-A

μ

PD43256BGW-A12-9JL-A

μ

PD43256BGW-B10-9JL-A

μ

PD43256BGW-B12-9JL-A

μ

PD43256BGW-B15-9JL-A

μ

PD43256BGW-70LL-9KL-A

μ

PD43256BGW-85LL-9KL-A

μ

PD43256BGW-A85-9KL-A

μ

PD43256BGW-A10-9KL-A

μ

PD43256BGW-A12-9KL-A

μ

PD43256BGW-B10-9KL-A

μ

PD43256BGW-B12-9KL-A

μ

PD43256BGW-B15-9KL-A

Remark Products with -A at the end of the part number are lead-free products.

28-pin PLASTIC TSOP (I) 70 4.5 to 5.5 LL version

(8x13.4) (Reverse bent) 85

85 3.0 to 5.5 A version

100

120

100 2.7 to 5.5 B version

120

150

85 3.0 to 5.5 A version

100

120

100 2.7 to 5.5 B version

120

150

Data Sheet M10770EJEV0DS

3

μ

Pin Configurations (Marking Side)

/xxx indicates active low signal.

28-pin PLASTIC DIP (15.24 mm (600))

[

μ

PD43256BCZ-xxL ]

[ μPD43256BCZ-xxLL ]

PD43256B

A14

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O1

I/O2

I/O3

GND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

V

CC

/WE

A13

A8

A9

A11

/OE

A10

/CS

I/O8

I/O7

I/O6

I/O5

I/O4

A0 - A14 : Address inputs

I/O1 - I/O8 : Data inputs / outputs

/CS : Chip Select

/WE : Write Enable

/OE : Output Enable

VCC : Power supply

GND : Ground

Remark Refer to Package Drawings for the 1-pin index mark.

4

Data Sheet M10770EJEV0DS

μ

PD43256B

28-pin PLASTIC SOP (11.43 mm (450))

[

μ

PD43256BGU-xxL ]

[ μPD43256BGU-xxLL ]

[ μPD43256BGU-Axx ]

[ μPD43256BGU-Bxx ]

[ μPD43256BGU-xxL-A ]

[ μPD43256BGU-xxLL-A ]

[ μPD43256BGU-Axx-A ]

[ μPD43256BGU-Bxx-A ]

A14

1

28

V

CC

A12

A7

A6

A5

A4

A3

A2

A1

A0

I/O1

I/O2

I/O3

GND

2

3

4

5

6

7

8

9

10

11

12

13

14

27

26

25

24

23

22

21

20

19

18

17

16

15

/WE

A13

A8

A9

A11

/OE

A10

/CS

I/O8

I/O7

I/O6

I/O5

I/O4

A0 - A14 : Address inputs

I/O1 - I/O8 : Data inputs / outputs

/CS : Chip Select

/WE : Write Enable

/OE : Output Enable

VCC : Power supply

GND : Ground

Remark Refer to Package Drawings for the 1-pin index mark.

Data Sheet M10770EJEV0DS

5

μ

PD43256B

28-pin PLASTIC TSOP (I) (8x13.4) (Normal bent)

[

μ

PD43256BGW-xxLL-9JL ]

[ μPD43256BGW-Axx-9JL ]

[ μPD43256BGW-Bxx-9JL ]

[ μPD43256BGW-xxLL-9JL-A ]

[ μPD43256BGW-Axx-9JL-A ]

[ μPD43256BGW-Bxx-9JL-A ]

/OE
A11

A9
A8

A13

/WE

V
A14
A12

A7
A6
A5
A4
A3

1
2
3
4
5
6

CC

7
8
9
10
11
12
13
14

28
27
26
25
24
23
22
21
20
19
18
17
16
15

A10
/CS
I/O8
I/O7
I/O6
I/O5
I/O4
GND
I/O3
I/O2
I/O1
A0
A1
A2

28-pin PLASTIC TSOP (I) (8x13.4) (Reverse bent)

[

μ

PD43256BGW-xxLL-9KL ]

[ μPD43256BGW-Axx-9KL ]

[ μPD43256BGW-Bxx-9KL ]

[ μPD43256BGW-xxLL-9KL-A ]

[ μPD43256BGW-Axx-9KL-A ]

[ μPD43256BGW-Bxx-9KL-A ]

A10

/CS

I/O8

I/O7

I/O6

I/O5

I/O4

GND

I/O3

I/O2

I/O1

A0

A1

A2

28
27
26
25
24
23
22
21
20
19
18
17
16
15

1
2
3
4
5
6
7
8
9
10
11
12
13
14

/OE
A11
A9
A8
A13

/WE

V
A14
A12
A7
A6
A5
A4
A3

CC

A0 - A14 : Address inputs /OE : Output Enable

I/O1 - I/O8 : Data inputs / outputs VCC : Power supply

/CS : Chip Select GND : Ground

/WE : Write Enable

Remark Refer to Package Drawings for the 1-pin index mark.

6

Data Sheet M10770EJEV0DS

μ

Block Diagram

PD43256B

I/O1

I/O8

/CS

A0

A14

Address

buffer

Row

decoder

Input data

controller

Memory cell array

262,144 bits

Sense amplifier /
Switching circuit

Column decoder

Address buffer

Output data

controller

/OE

/WE

CC

V

GND

Truth Table

/CS /OE /WE Mode I/O Supply current

H × × Not selected High impedance ISB

L H H Output disable ICCA

L × L Write DIN

L L H Read DOUT

Remark × : VIH or VIL

Data Sheet M10770EJEV0DS

7

μ

PD43256B

Electrical Specifications

Absolute Maximum Ratings

Parameter Symbol Condition Rating Unit

Supply voltage VCC –0.5

Input / Output voltage VT –0.5

Operating ambient temperature TA 0 to 70 °C

Storage temperature Tstg –55 to +125 °C

Note –3.0 V (MIN.) (Pulse width : 50 ns)

Caution Exposing the device to stress above those listed in Absolute Maximum Rating could cause

permanent damage. The device is not meant to be operated under conditions outside the limits

described in the operational section of this specification. Exposure to Absolute Maximum Rating

conditions for extended periods may affect device reliability.

Recommended Operating Conditions

Note

to +7.0 V

Note

to VCC + 0.5 V

μ

Parameter Symbol Condition

MIN. MAX. MIN. MAX. MIN. MAX.

Supply voltage VCC 4.5 5.5 3.0 5.5 2.7 5.5 V

High level input voltage VIH 2.2 VCC+0.5 2.2 VCC+0.5 2.2 VCC+0.5 V

Low level input voltage VIL –0.3

Operating ambient temperature TA 0 70 0 70 0 70

PD43256B-xxL

μ

PD43256B-xxLL

Note

+0.8 –0.3

μ

PD43256B-Axx

Note

+0.5 –0.3

μ

PD43256B-Bxx

Note

+0.5 V

Unit

°C

Note –3.0 V (MIN.) (Pulse width: 50 ns)

Capacitance (T

Input capacitance CIN VIN = 0 V 5 pF

Input / Output capacitance CI/O VI/O = 0 V 8 pF

A = 25 °C, f = 1 MHz)

Parameter Symbol Test conditions MIN. TYP. MAX. Unit

Remarks 1. VIN : Input voltage

VI/O : Input / Output voltage

2. These parameters are periodically sampled and not 100% tested.

8

Data Sheet M10770EJEV0DS

μ

PD43256B

DC Characteristics (Recommended Operating Conditions Unless Otherwise Noted) (1/2)

μ

Parameter Symbol Test condition

MIN. TYP. MAX. MIN. TYP. MAX.

Input leakage current ILI VIN = 0 V to VCC –1.0 +1.0 –1.0 +1.0

I/O leakage current ILO VI/O = 0 V to VCC, /OE = VIH or –1.0 +1.0 –1.0 +1.0

/CS = VIH or /WE = VIL

Operating supply current ICCA1 /CS = VIL, Minimum cycle time, II/O = 0 mA 45 45 mA

ICCA2 /CS = VIL, II/O = 0 mA 10 10

PD43256B-xxL

μ

PD43256B-xxLL

Unit

μ

μ

A

A

ICCA3

Standby supply current ISB /CS = VIH 3 3 mA

ISB1

High level output voltage VOH1 IOH = –1.0 mA 2.4 2.4 V

VOH2 IOH = –0.1 mA

Low level output voltage VOL IOL = 2.1 mA 0.4 0.4 V

/CS ≤ 0.2 V, Cycle = 1 MHz,

I

I/O = 0 mA, VIL ≤ 0.2 V, VIH ≥ VCC – 0.2 V

/CS ≥ V

CC − 0.2 V

10 10

1.0 50 0.5 15

VCC–0.5

VCC–0.5

μ

A

Remarks 1. VIN : Input voltage

VI/O : Input / Output voltage

2. These DC characteristics are in common regardless of package types.

Data Sheet M10770EJEV0DS

9