motorola / 62v256
.pdf
HM62V256 Series
Write Timing Waveform (2) (OE Low Fixed)
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t WC |
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Address |
Valid address |
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tCW |
t WR |
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CS |
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*1 |
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tAW |
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tWP |
t OH |
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WE |
tAS |
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tWHZ |
t OW |
*3 |
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*2 |
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Dout |
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t DW |
tDH |
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*4 |
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Din |
High impedance |
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Valid data |
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Notes: 1. If CS goes low simultaneously with WE going low or after WE going low, the outputs remain in the high impedance state.
2.Dout is the same phase of the write data of this write cycle.
3.Dout is the read data of next address.
4.If CS is low during this period, I/O pins are in the output state. Therefore, the input signals of the opposite phase to the output must not be applied to them.
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HM62V256 Series
Low VCC Data Retention Characteristics (Ta = 0 to +70°C)
Parameter |
Symbol |
Min |
Typ*1 |
Max |
Unit |
Test conditions*6 |
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VCC for data retention |
VDR |
2.0 |
— |
3.6 |
V |
CS ³ VCC – 0.2 V, Vin ³ 0 V |
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Data retention current |
ICCDR |
— |
0.05 |
27 *2 |
mA |
VCC |
= 2.7 V, Vin ³ 0 V |
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CS |
³ VCC – 0.2 V |
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— |
0.05 |
7 |
*3 |
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— |
0.05 |
2 |
*4 |
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Chip deselect to data retention time |
tCDR |
0 |
— |
— |
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ns |
See retention waveform |
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Operation recovery time |
t |
t *5 |
— |
— |
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ns |
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R |
RC |
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Notes: 1. Typical values are at VCC = 2.7 V, Ta = 25°C and not guaranteed.
2.9 mA max at Ta = 0 to 40°C.
3.This characteristics guaranteed for only L-SL version. 2.0 mA max at Ta = 0 to 40°C.
4.This characteristics guaranteed for only L-UL version. 0.4 mA max at Ta = 0 to 40°C.
5.tRC = read cycle time.
6.CS controls address buffer, WE buffer, OE buffer, and Din buffer. If CS controls data retention mode, other input levels (address, WE, OE, I/O) can be in the high impedance state.
Low VCC Data Retention Timing Waveform
Data retention mode
VCC
2.7 V
tCDR |
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tR |
0.7VCC VDR
CS |
CS |
> VCC – 0.2 V |
0 V |
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HM62V256 Series
Package Dimensions
HM62V256LFP Series (FP-28DA)
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18.00 |
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18.75 Max |
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28 |
15 |
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8.40 |
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1 |
14 |
Max |
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0.08 0.07 |
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1.27 Max |
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3.00 |
0.17 |
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+ – |
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1.27 ± 0.10 |
0.40 –+ 0.050.10 |
0.20 ± 0.10 |
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HM62V256LT Series (TFP-32DA)
8.00
8.20 Max
32 
17
Unit: mm
11.80 ± 0.30
1.70
0 – 10 °
1.00 ± 0.20
Unit: mm
12.40
1 |
16 |
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0.50 |
0.20 ± 0.10
0.08 M
0.45 Max |
Max |
0.10 |
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1.20 |
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14.00 ± 0.20 |
0.80 |
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0.05±0.17 |
0.05±0.13 |
0 – 5 ° |
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0.50 ± 0.10 |
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HM62V256 Series
HM62V256LTM Series (TFP-28DA) |
Unit: mm |
8.00
8.15 Max 21 
8
11.80
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22 |
7 |
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0.55 |
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0.20 |
+0.10 |
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–0.05 |
0.10 |
M |
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0.63 Max |
Max |
0.10 |
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1.2 |
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+0.05 |
–0.02 |
+0.10 |
–0.05 |
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0.15 |
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0.05 |
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13.4 ± 0.3 |
0.80 |
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5° Max |
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0.50 ± 0.10 |
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