HM6268LP-45 ETC-unknow, HM6268LP-45 Datasheet

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HM6268LP-45

Manufacturer Part Number
HM6268LP-45
Description
Manufacturer
ETC-unknow
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HM6268LP-45
Manufacturer:
HITACHI
Quantity:
5 530
Part Number:
HM6268LP-45
Manufacturer:
HITACHI
Quantity:
6 226
Features
• Single 5 V supply and high density 20-pin
• High speed: fast access time 25/35/45 ns (max)
• Low power
• Completely static memory: no clock or timing
• Equal access and cycle times
• Directly TTL compatible—all inputs and outputs
• Battery back-up operation capability
Ordering Information
Type No.
HM6268P-25
HM6268P-35
HM6268P-45
HM6268LP-25
HM6268LP-35
HM6268LP-45
HM6268 Series
4096-word
Note: This device is not available for new application.
package
— Active: 250 mW (typ)
— Standby: 100 µW (typ), 5 µW (typ)
strobe required
(L-version)
(L-version)
4-bit High-Speed CMOS Static RAM
Access time
25 ns
35 ns
45 ns
25 ns
35 ns
45 ns
Package
300-mil 20-pin, plastic DIP
(DP-20N)
Pin Arrangement
A10
A11
V
CS
A4
A5
A6
A7
A8
A9
SS
(Top view)
1
2
3
4
5
6
7
8
9
10
Maintenance only
20
19
18
17
16
15
14
13
12
11
V
A3
A2
A1
A0
I/O1
I/O2
I/O3
I/O4
WE
CC
1

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HM6268LP-45 Summary of contents

Page 1

... Directly TTL compatible—all inputs and outputs • Battery back-up operation capability (L-version) Ordering Information Type No. Access time HM6268P- HM6268P- HM6268P- HM6268LP- HM6268LP- HM6268LP- Note: This device is not available for new application. Maintenance only Pin Arrangement ...

Page 2

HM6268 Series Block Diagram A10 I/O1 I/O2 I/O3 I/ Truth Table CS WE Mode H x Not Selected L H Read L L Write Absolute Maximum Ratings Parameter Voltage on any pin relative ...

Page 3

HM6268 Series Recommended DC Operating Conditions ( 70°C) Parameter Symbol V Supply voltage Input high (logic 1) voltage V IH Input low (logic 0) voltage V IL Note: 1. –3.0 V for pulse ...

Page 4

HM6268 Series AC Characteristics ( 10 +70°C, unless otherwise noted Test Conditions: • Input pulse levels 3 • Input rise and fall times • ...

Page 5

HM6268 Series Read Timing Waveform (1) Address Dout WE is high for read cycle. Notes: 1. Device is continuously selected Read Timing Waveform (2) CS Dout High impedance Supply CC current I SB ...

Page 6

HM6268 Series Write Cycle Parameter Write cycle time Chip selection to end of write Address valid to end of write Address setup time Write pulse width Write recovery time Data valid to end of write Data hold time Write enabled ...

Page 7

HM6268 Series WE Write Timing Waveform (1) ( Address Din Dout A write cycle occurs during the overlap of a low CS and a low WE (t Notes measured from the earlier ...

Page 8

HM6268 Series CS Write Timing Waveform (2) ( Address CS WE Din Dout A write cycle occurs during the overlap of a low CS and a low WE (t Notes measured from the earlier ...

Page 9

HM6268 Series Low V Data Retention Characteristics (0°C Ta 70°C) CC These characteristics are guaranteed only for L-version. Parameter V for data retention CC Data retention current Chip deselect to data retention time Operation recovery time Notes: 1. Read cycle ...

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