HM62256A Series
Maintenance only
32,768-word × 8-bit High Speed CMOS Static RAM
The Hitachi HM62256A is a CMOS static RAM organized 32-kword × 8-bit. It realizes higher performance and low power consumption by employing 0.8 µm Hi-CMOS process technology. The device, packaged in a 8 × 14 mm TSOP with thickness of 1.2 mm, 450-mil SOP (foot print pitch width), 600-mil plastic DIP, or 300-mil plastic DIP, is available for high density mounting. TSOP package is suitable for cards, and reverse type TSOP is also provided. It offers low power standby power dissipation; therefore, it is suitable for battery back up system.
Features
•High speed: Fast Access time 85/100/120/150 ns (max)
•Low Power
Standby: 5 µW (typ) (L/L-SL version) Operation: 40 mW (typ) (f = 1 MHz)
•Single 5 V supply
•Completely static memory
No clock or timing strobe required
•Equal access and cycle times
•Common data input and output: Three state output
•Directly TTL compatible: All inputs and outputs
•Capability of battery back up operation
Ordering Information
Type No. Access time Package
——————————————————————–
HM62256AP-8 |
85 ns |
600-mil |
HM62256AP-10 |
100 ns |
28-pin |
HM62256AP-12 |
120 ns |
plastic DIP |
HM62256AP-15 |
150 ns |
(DP-28) |
————————————————– |
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HM62256ALP-8 |
85 ns |
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HM62256ALP-10 |
100 ns |
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HM62256ALP-12 |
120 ns |
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HM62256ALP-15 |
150 ns |
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————————————————– |
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HM62256ALP-8SL |
85 ns |
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HM62256ALP-10SL |
100 ns |
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HM62256ALP-12SL |
120 ns |
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HM62256ALP-15SL |
150 ns |
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——————————————————————–
HM62256ASP-8 |
85 ns |
300-mil |
HM62256ASP-10 |
100 ns |
28-pin |
HM62256ASP-12 |
120 ns |
plastic DIP |
HM62256ASP-15 |
150 ns |
(DP-28NA) |
————————————————– |
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HM62256ALSP-8 |
85 ns |
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HM62256ALSP-10 |
100 ns |
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HM62256ALSP-12 |
120 ns |
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HM62256ALSP-15 |
150 ns |
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————————————————– |
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HM62256ALSP-8SL |
85 ns |
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HM62256ALSP-10SL |
100 ns |
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HM62256ALSP-12SL |
120 ns |
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HM62256ALSP-15SL |
150 ns |
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——————————————————————–
HM62256AFP-8T |
85 ns |
450-mil |
HM62256AFP-10T |
100 ns |
28-pin |
HM62256AFP-12T |
120 ns |
plastic SOP |
HM62256AFP-15T |
150 ns |
(FP-28DA) |
————————————————– |
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HM62256ALFP-8T |
85 ns |
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HM62256ALFP-10T |
100 ns |
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HM62256ALFP-12T |
120 ns |
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HM62256ALFP-15T |
150 ns |
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————————————————–
HM62256ALFP-8SLT 85 ns HM62256ALFP-10SLT 100 ns HM62256ALFP-12SLT 120 ns HM62256ALFP-15SLT 150 ns
——————————————————————–
Note: This device is not available for new application.
1
HM62256A Series |
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HM62256A Series |
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TSOP Series |
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Type No. |
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Access time |
Package |
Type No. |
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Access time |
Package |
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——————————————————————– |
——————————————————————– |
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HM62256ALT-8 |
85 ns |
8 mm × 14 mm |
HM62256ALR-8 |
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85 ns |
8 mm × 14 mm |
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HM62256ALT-10 |
100 ns |
32-pin TSOP |
HM62256ALR-10 |
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100 ns |
32-pin TSOP |
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HM62256ALT-12 |
120 ns |
(normal type) |
HM62256ALR-12 |
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120 ns |
(reverse type) |
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HM62256ALT-15 |
150 ns |
(TFP-32DA) |
HM62256ALR-15 |
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150 ns |
(TFP-32DAR) |
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HM62256ALT-8SL |
85 ns |
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HM62256ALR-8SL 85 ns |
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HM62256ALT-10SL |
100 ns |
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HM62256ALR-10SL 100 ns |
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HM62256ALT-12SL |
120 ns |
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HM62256ALR-12SL 120 ns |
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HM62256ALT-15SL |
150 ns |
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HM62256ALR-15SL 150 ns |
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——————————————————————– |
——————————————————————– |
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Pin Arrangement |
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HM62256AP/AFP/ASP Series |
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VCC |
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A14 |
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1 |
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28 |
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A12 |
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WE |
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2 |
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27 |
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A7 |
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A13 |
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3 |
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26 |
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A6 |
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A8 |
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4 |
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25 |
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A5 |
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A9 |
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5 |
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24 |
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A4 |
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A11 |
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6 |
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23 |
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A3 |
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OE |
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7 |
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22 |
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A2 |
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A10 |
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8 |
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A1 |
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CS |
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9 |
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A0 |
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I/O7 |
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10 |
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19 |
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I/O0 |
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I/O6 |
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11 |
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18 |
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I/O1 |
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I/O5 |
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12 |
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17 |
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I/O2 |
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I/O4 |
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13 |
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16 |
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VSS |
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I/O3 |
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14 |
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15 |
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(Top view) |
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HM62256AT Series |
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HM62256AR Series |
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A10 |
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A3 |
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A2 |
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OE |
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1 |
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32 |
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16 |
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17 |
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A11 |
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2 |
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31 |
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CS |
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A4 |
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15 |
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18 |
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A1 |
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NC |
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3 |
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30 |
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NC |
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NC |
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14 |
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19 |
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NC |
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A9 |
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4 |
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29 |
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I/O7 |
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A5 |
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20 |
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A0 |
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A8 |
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5 |
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28 |
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I/O6 |
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A6 |
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12 |
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21 |
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I/O0 |
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A13 |
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6 |
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27 |
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I/O5 |
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A7 |
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11 |
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22 |
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I/O1 |
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WE |
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7 |
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26 |
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I/O4 |
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A12 |
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10 |
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23 |
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I/O2 |
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VCC |
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8 |
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25 |
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I/O3 |
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A14 |
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9 |
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24 |
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VSS |
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A14 |
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9 |
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24 |
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VSS |
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VCC |
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8 |
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25 |
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I/O3 |
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A12 |
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10 |
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23 |
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I/O2 |
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WE |
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7 |
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26 |
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I/O4 |
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A7 |
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11 |
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22 |
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I/O1 |
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A13 |
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6 |
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27 |
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I/O5 |
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A6 |
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12 |
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21 |
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I/O0 |
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A8 |
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5 |
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28 |
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I/O6 |
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A5 |
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20 |
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A0 |
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A9 |
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4 |
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29 |
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I/O7 |
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NC |
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14 |
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19 |
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NC |
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NC |
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3 |
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30 |
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NC |
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A4 |
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15 |
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18 |
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A1 |
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A11 |
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2 |
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31 |
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CS |
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A3 |
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16 |
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17 |
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A2 |
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OE |
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1 |
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32 |
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A10 |
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(Top view) |
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(Top view) |
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2
HM62256A Series |
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HM62256A Series |
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Pin Description |
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Symbol |
Function |
Symbol |
Function |
——————————————————————– |
——————————————————————– |
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A0 – A14 |
Address |
OE |
Output enable |
——————————————————————– |
——————————————————————– |
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I/O0 – I/O7 |
Input/output |
NC |
No connection |
——————————————————————– |
——————————————————————– |
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CS |
Chip select |
VCC |
Power supply |
——————————————————————– |
——————————————————————– |
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WE |
Write enable |
VSS |
Ground |
——————————————————————– |
——————————————————————– |
Block Diagram
A5 |
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V CC |
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A4 |
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V SS |
A3 |
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A11 |
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Memory Matrix |
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Row |
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512 × 512 |
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A9 |
• |
Decoder |
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• |
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A8 |
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A12 |
• |
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A7 |
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A6 |
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I/O0 |
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Column I/O |
• |
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Input |
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Column Decoder |
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• |
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Data |
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• |
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Control |
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• |
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I/O7 |
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A0 |
A1 |
A2 A10 A13 A14 |
• |
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CS |
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Timing Pulse Generator |
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WE |
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Read/Write Control |
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OE |
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3 |
HM62256A Series |
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HM62256A Series |
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Function Table |
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WE |
CS |
OE |
Mode |
VCC current |
I/O pin |
Ref. cycle |
———————————————————————————————————————————————–
X H X Not selected ISB, ISB1 High-Z —
———————————————————————————————————————————————–
H L H Output disable ICC High-Z —
———————————————————————————————————————————————–
H L L Read ICC Dout Read cycle (1)–(3)
———————————————————————————————————————————————–
L L H Write ICC Din Write cycle (1)
———————————————————————————————————————————————–
L L L Write ICC Din Write cycle (2)
———————————————————————————————————————————————–
Note: X: H or L
Absolute Maximum Ratings
Parameter Symbol Value Unit
———————————————————————————————————————————————–
Voltage on any pin relative to V |
SS |
V |
T |
–0.5*1 to +7.0 |
V |
|
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———————————————————————————————————————————————–
Power dissipation PT 1.0 W
———————————————————————————————————————————————–
Operating temperature Topr 0 to +70 °C
———————————————————————————————————————————————–
Storage temperature Tstg –55 to +125 °C
———————————————————————————————————————————————–
Storage temperature under bias Tbias –10 to +85 °C
———————————————————————————————————————————————–
Note: 1. VT min = –3.0 V for pulse half-width ≤ 50 ns
Recommended DC Operating Conditions (Ta = 0 to +70°C)
Parameter |
Symbol |
Min |
Typ |
Max |
Unit |
———————————————————————————————————————————————–
Supply voltage |
VCC |
4.5 |
5.0 |
5.5 |
V |
———————————————————————————————–
VSS |
0 |
0 |
0 |
V |
———————————————————————————————————————————————–
Input high (logic 1) voltage |
VIH |
2.2 |
— |
6.0 |
V |
———————————————————————————————————————————————–
Input low (logic 0) voltage |
V |
IL |
–0.5*1 |
— |
0.8 |
V |
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———————————————————————————————————————————————–
Note: 1. VIL min = –3.0 V for pulse half-width ≤ 50 ns
4