NEC PD43256B DATA SHEET
UPD43256BGU-70L-A DATA SHEET
MOS INTEGRATED CIRCUIT
μPD43256B
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 |
|
|
V |
°C |
mA (MAX.) |
μA (MAX.) |
μA (MAX.) Note1 |
|
|
|
|
|
|
|
μPD43256B-xxL |
70, 85 |
4.5 to 5.5 |
0 to 70 |
45 |
50 |
3 |
|
|
|
|
|
|
|
μPD43256B-xxLL |
|
|
|
|
15 |
2 |
|
|
|
|
|
|
|
μPD43256B-Axx |
85, 100 Note2, 120 Note2 |
3.0 to 5.5 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256B-Bxx Note2 |
100, 120, 150 |
2.7 to 5.5 |
|
|
|
|
|
|
|
|
|
|
|
Notes 1. TA ≤ 40 °C, VCC = 3.0 V
2. Access time: 85 ns (MAX.) (VCC = 4.5 to 5.5 V)
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) |
|
1990, 1993, 1994 |
|
||
Printed in Japan |
|
|
|
|
μPD43256B
Ordering Information |
|
|
|
|
|
(1/2) |
|
|
|
|
|
|
|
Part number |
Package |
Access time |
Operating supply |
Operating ambient |
Remark |
|
|
|
ns (MAX.) |
voltage |
|
temperature |
|
|
|
|
V |
|
°C |
|
|
|
|
|
|
|
|
μPD43256BCZ-70L |
28-pin PLASTIC DIP |
70 |
4.5 to 5.5 |
|
0 to 70 |
L version |
|
|
|
|
|
|
|
μPD43256BCZ-85L |
(15.24 mm (600)) |
85 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BCZ-70LL |
|
70 |
|
|
|
LL version |
|
|
|
|
|
|
|
μPD43256BCZ-85LL |
|
85 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGU-70L |
28-pin PLASTIC SOP |
70 |
|
|
|
L version |
|
|
|
|
|
|
|
μPD43256BGU-85L |
(11.43 mm (450)) |
85 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGU-70LL |
|
70 |
|
|
|
LL version |
|
|
|
|
|
|
|
μPD43256BGU-85LL |
|
85 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGU-A85 |
|
85 |
3.0 to 5.5 |
|
|
A version |
|
|
|
|
|
|
|
μPD43256BGU-A10 |
|
100 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGU-A12 |
|
120 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGU-B10 |
|
100 |
2.7 to 5.5 |
|
|
B version |
|
|
|
|
|
|
|
μPD43256BGU-B12 |
|
120 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-70LL-9JL |
28-pin PLASTIC TSOP (I) |
70 |
4.5 to 5.5 |
|
|
LL version |
|
|
|
|
|
|
|
μPD43256BGW-85LL-9JL |
(8x13.4) (Normal bent) |
85 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-A85-9JL |
|
85 |
3.0 to 5.5 |
|
|
A version |
|
|
|
|
|
|
|
μPD43256BGW-A10-9JL |
|
100 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-A12-9JL |
|
120 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-B10-9JL |
|
100 |
2.7 to 5.5 |
|
|
B version |
|
|
|
|
|
|
|
μPD43256BGW-B12-9JL |
|
120 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-B15-9JL |
|
150 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-70LL-9KL |
28-pin PLASTIC TSOP (I) |
70 |
4.5 to 5.5 |
|
|
LL version |
|
|
|
|
|
|
|
μPD43256BGW-85LL-9KL |
(8x13.4) (Reverse bent) |
85 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-A85-9KL |
|
85 |
3.0 to 5.5 |
|
|
A version |
|
|
|
|
|
|
|
μPD43256BGW-A10-9KL |
|
100 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-A12-9KL |
|
120 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-B10-9KL |
|
100 |
2.7 to 5.5 |
|
|
B version |
|
|
|
|
|
|
|
μPD43256BGW-B12-9KL |
|
120 |
|
|
|
|
|
|
|
|
|
|
|
μPD43256BGW-B15-9KL |
|
150 |
|
|
|
|
|
|
|
|
|
|
|
2 |
Data Sheet M10770EJEV0DS |
μPD43256B
|
|
|
|
|
(2/2) |
|
|
|
|
|
|
Part number |
Package |
Access time |
Operating supply |
Operating ambient |
Remark |
|
|
ns (MAX.) |
voltage |
temperature |
|
|
|
|
V |
°C |
|
|
|
|
|
|
|
μPD43256BGU-70L-A |
28-pin PLASTIC SOP |
70 |
4.5 to 5.5 |
0 to 70 |
L version |
|
|
|
|
|
|
μPD43256BGU-85L-A |
(11.43 mm (450)) |
85 |
|
|
|
|
|
|
|
|
|
μPD43256BGU-70LL-A |
|
70 |
|
|
LL version |
|
|
|
|
|
|
μPD43256BGU-85LL-A |
|
85 |
|
|
|
|
|
|
|
|
|
μPD43256BGU-A85-A |
|
85 |
3.0 to 5.5 |
|
A version |
|
|
|
|
|
|
μPD43256BGU-A10-A |
|
100 |
|
|
|
|
|
|
|
|
|
μPD43256BGU-A12-A |
|
120 |
|
|
|
|
|
|
|
|
|
μPD43256BGU-B10-A |
|
100 |
2.7 to 5.5 |
|
B version |
|
|
|
|
|
|
μPD43256BGU-B12-A |
|
120 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-70LL-9JL-A |
28-pin PLASTIC TSOP (I) |
70 |
4.5 to 5.5 |
|
LL version |
|
|
|
|
|
|
μPD43256BGW-85LL-9JL-A |
(8x13.4) (Normal bent) |
85 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-A85-9JL-A |
|
85 |
3.0 to 5.5 |
|
A version |
|
|
|
|
|
|
μPD43256BGW-A10-9JL-A |
|
100 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-A12-9JL-A |
|
120 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-B10-9JL-A |
|
100 |
2.7 to 5.5 |
|
B version |
|
|
|
|
|
|
μPD43256BGW-B12-9JL-A |
|
120 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-B15-9JL-A |
|
150 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-70LL-9KL-A |
28-pin PLASTIC TSOP (I) |
70 |
4.5 to 5.5 |
|
LL version |
|
|
|
|
|
|
μPD43256BGW-85LL-9KL-A |
(8x13.4) (Reverse bent) |
85 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-A85-9KL-A |
|
85 |
3.0 to 5.5 |
|
A version |
|
|
|
|
|
|
μPD43256BGW-A10-9KL-A |
|
100 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-A12-9KL-A |
|
120 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-B10-9KL-A |
|
100 |
2.7 to 5.5 |
|
B version |
|
|
|
|
|
|
μPD43256BGW-B12-9KL-A |
|
120 |
|
|
|
|
|
|
|
|
|
μPD43256BGW-B15-9KL-A |
|
150 |
|
|
|
|
|
|
|
|
|
Remark Products with -A at the end of the part number are lead-free products.
Data Sheet M10770EJEV0DS |
3 |
μPD43256B
Pin Configurations (Marking Side)
/xxx indicates active low signal.
28-pin PLASTIC DIP (15.24 mm (600)) [ μPD43256BCZ-xxL ]
[ μPD43256BCZ-xxLL ]
A14 |
1 |
28 |
VCC |
A12 |
2 |
27 |
/WE |
A7 |
3 |
26 |
A13 |
A6 |
4 |
25 |
A8 |
A5 |
5 |
24 |
A9 |
A4 |
6 |
23 |
A11 |
A3 |
7 |
22 |
/OE |
A2 |
8 |
21 |
A10 |
A1 |
9 |
20 |
/CS |
A0 |
10 |
19 |
I/O8 |
I/O1 |
11 |
18 |
I/O7 |
I/O2 |
12 |
17 |
I/O6 |
I/O3 |
13 |
16 |
I/O5 |
GND |
14 |
15 |
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 |
μPD43256B
28-pin PLASTIC SOP (11.43 mm (450)) [ μPD43256BGU-xxL ]
[ μPD43256BGU-xxLL ] [ μPD43256BGU-Axx ] [ μPD43256BGU-Bxx ] [ μPD43256BGU-xxL-A ]
[ μPD43256BGU-xxLL-A ] [ μPD43256BGU-Axx-A ] [ μPD43256BGU-Bxx-A ]
A14 |
1 |
28 |
VCC |
A12 |
2 |
27 |
/WE |
A7 |
3 |
26 |
A13 |
A6 |
4 |
25 |
A8 |
A5 |
5 |
24 |
A9 |
A4 |
6 |
23 |
A11 |
A3 |
7 |
22 |
/OE |
A2 |
8 |
21 |
A10 |
A1 |
9 |
20 |
/CS |
A0 |
10 |
19 |
I/O8 |
I/O1 |
11 |
18 |
I/O7 |
I/O2 |
12 |
17 |
I/O6 |
I/O3 |
13 |
16 |
I/O5 |
GND |
14 |
15 |
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 |
μPD43256B
28-pin PLASTIC TSOP (I) (8x13.4) (Normal bent) [ μPD43256BGW-xxLL-9JL ]
[ μPD43256BGW-Axx-9JL ] [ μPD43256BGW-Bxx-9JL ]
[ μPD43256BGW-xxLL-9JL-A ] [ μPD43256BGW-Axx-9JL-A ] [ μPD43256BGW-Bxx-9JL-A ]
/OE |
1 |
A11 |
2 |
A9 |
3 |
A8 |
4 |
A13 |
5 |
/WE |
6 |
VCC |
7 |
A14 |
8 |
A12 |
9 |
A7 |
10 |
A6 |
11 |
A5 |
12 |
A4 |
13 |
A3 |
14 |
28 |
A10 |
27 |
/CS |
26 |
I/O8 |
25 |
I/O7 |
24 |
I/O6 |
23 |
I/O5 |
22 |
I/O4 |
21 |
GND |
20 |
I/O3 |
19 |
I/O2 |
18 |
I/O1 |
17 |
A0 |
16 |
A1 |
15 |
A2 |
28-pin PLASTIC TSOP (I) (8x13.4) (Reverse bent) [ μPD43256BGW-xxLL-9KL ]
[ μPD43256BGW-Axx-9KL ] [ μPD43256BGW-Bxx-9KL ]
[ μPD43256BGW-xxLL-9KL-A ] [ μPD43256BGW-Axx-9KL-A ] [ μPD43256BGW-Bxx-9KL-A ]
A10 |
28 |
1 |
/OE |
/CS |
27 |
2 |
A11 |
I/O8 |
26 |
3 |
A9 |
I/O7 |
25 |
4 |
A8 |
I/O6 |
24 |
5 |
A13 |
I/O5 |
23 |
6 |
/WE |
I/O4 |
22 |
7 |
VCC |
GND |
21 |
8 |
A14 |
I/O3 |
20 |
9 |
A12 |
I/O2 |
19 |
10 |
A7 |
I/O1 |
18 |
11 |
A6 |
A0 |
17 |
12 |
A5 |
A1 |
16 |
13 |
A4 |
A2 |
15 |
14 |
A3 |
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 |
μPD43256B
Block Diagram
A0 |
Address |
Row |
|
||
A14 |
buffer |
decoder |
|
|
|
I/O1 |
|
Input data |
|
|
|
I/O8 |
|
controller |
|
|
|
/CS |
|
|
/OE |
|
|
/WE |
|
|
VCC |
|
|
GND |
|
|
Memory cell array 262,144 bits
Sense amplifier /
Switching circuit Output data
controller
Column decoder
Address buffer
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 |
μPD43256B
Electrical Specifications
Absolute Maximum Ratings
Parameter |
Symbol |
Condition |
Rating |
Unit |
|
|
|
|
|
Supply voltage |
VCC |
|
–0.5 Note to +7.0 |
V |
|
|
|
|
|
Input / Output voltage |
VT |
|
–0.5 Note to VCC + 0.5 |
V |
|
|
|
|
|
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
Parameter |
Symbol |
Condition |
μPD43256B-xxL |
μPD43256B-Axx |
μPD43256B-Bxx |
Unit |
|||
|
|
|
μPD43256B-xxLL |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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 Note |
+0.8 |
–0.3 Note |
+0.5 |
–0.3 Note |
+0.5 |
V |
|
|
|
|
|
|
|
|
|
|
Operating ambient temperature |
TA |
|
0 |
70 |
0 |
70 |
0 |
70 |
°C |
|
|
|
|
|
|
|
|
|
|
Note –3.0 V (MIN.) (Pulse width: 50 ns)
Capacitance (TA = 25 °C, f = 1 MHz)
Parameter |
Symbol |
Test conditions |
MIN. |
TYP. |
MAX. |
Unit |
|
|
|
|
|
|
|
Input capacitance |
CIN |
VIN = 0 V |
|
|
5 |
pF |
|
|
|
|
|
|
|
Input / Output capacitance |
CI/O |
VI/O = 0 V |
|
|
8 |
pF |
|
|
|
|
|
|
|
Remarks 1. VIN : Input voltage
VI/O : Input / Output voltage
2. These parameters are periodically sampled and not 100% tested.
8 |
Data Sheet M10770EJEV0DS |
μPD43256B
DC Characteristics (Recommended Operating Conditions Unless Otherwise Noted) (1/2)
Parameter |
Symbol |
Test condition |
μPD43256B-xxL |
μPD43256B-xxLL |
Unit |
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
MIN. |
TYP. |
MAX. |
MIN. |
TYP. |
MAX. |
|
|
|
|
|
|
|
|
|
|
|
Input leakage current |
ILI |
VIN = 0 V to VCC |
–1.0 |
|
+1.0 |
–1.0 |
|
+1.0 |
μA |
|
|
|
|
|
|
|
|
|
|
I/O leakage current |
ILO |
VI/O = 0 V to VCC, /OE = VIH or |
–1.0 |
|
+1.0 |
–1.0 |
|
+1.0 |
μA |
|
|
/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 |
|
|
|
|
|
|
|
|
|
|
|
|
ICCA3 |
/CS ≤ 0.2 V, Cycle = 1 MHz, |
|
|
10 |
|
|
10 |
|
|
|
II/O = 0 mA, VIL ≤ 0.2 V, VIH ≥ VCC – 0.2 V |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Standby supply current |
ISB |
/CS = VIH |
|
|
3 |
|
|
3 |
mA |
|
|
|
|
|
|
|
|
|
|
|
ISB1 |
/CS ≥ VCC − 0.2 V |
|
1.0 |
50 |
|
0.5 |
15 |
μA |
|
|
|
|
|
|
|
|
|
|
High level output voltage |
VOH1 |
IOH = –1.0 mA |
2.4 |
|
|
2.4 |
|
|
V |
|
|
|
|
|
|
|
|
|
|
|
VOH2 |
IOH = –0.1 mA |
VCC–0.5 |
|
|
VCC–0.5 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Low level output voltage |
VOL |
IOL = 2.1 mA |
|
|
0.4 |
|
|
0.4 |
V |
|
|
|
|
|
|
|
|
|
|
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 |
Loading...