U633H04SK45 データシートの表示（PDF） - Zentrum Mikroelektronik Dresden AG
部品番号
コンポーネント説明
メーカー
U633H04SK45 Datasheet PDF : 13 Pages
| |||
U633H04
Preliminary
DISABELING AUTOMATIC STORES: STORE CYCLE INHIBIT and AUTOMATIC POWER UP RECALL
VCAP
5.0 V
VSWITCH AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Power Up
RECALL
24
tRESTORE
t
STORE inhibit
VCAP
1
2
3
4
5
+
6
7
100 µF 0.1 µF
8
± 20 % Bypass
9
10
11
12
13
14
VSS
VCCX
28
27
26
25 HSB
24
23
22
21
20
19
18
17
16
15
Power
Supply
10 KΩ
(optional,
mandatory if HSB
is used with
external circuitry)
Figure 1: AUTOMATIC STORE OPERATION
Schematic Diagram
VCAP 1
2
3
4
5
6
7
0.1 µF
Bypass
8
9
10
11
12
13
14
VSS
28 VCCX
27
26
25 HSB
24
23
22
21
20
19
18
17
16
15
Power
Supply
10 KΩ
(optional,
mandatory if HSB
is used with
external circuitry)
Figure 2: DISABELING AUTOMATIC STORES
Schematic Diagram
LOW AVERAGE ACTIVE POWER
The U633H04 has been designed to draw significantly
less power when E is LOW (chip enabled) but the
access cycle time is longer than 55 ns.
When E is HIGH the chip consumes only standby cur-
rent.
The overall average current drawn by the part depends
on the following items:
1. CMOS or TTL input levels
2. the time during which the chip is disabled (E HIGH)
3. the cycle time for accesses (E LOW)
4. the ratio of READs to WRITEs
5. the operating temperature
6. the power supply voltage level
12
December 12, 1997
Share Link: 