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Hitachi Power Semiconductor Device Electronic Components Datasheet

HM621664HB Datasheet

1M High Speed SRAM

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HM621664HB Series
1 M High Speed SRAM (64-kword × 16-bit)
ADE-203-349B(Z)
Rev. 2.0
Nov. 1997
Description
The HM621664HB is an asynchronous high speed static RAM organized as 64-kword × 16-bit. It realize
high speed access time (15/20 ns) with employing 0.8 µm CMOS process and high speed circuit designing
technology. It is most appropriate for the application which requires high speed, high density memory and
wide bit width configuration, such as cache and buffer memory in system. The HM621664HB is packaged
in 400-mil 44-pin SOJ for high density surface mounting.
Features
Single 5 V supply
Access time: 15/20 ns (max)
Completely static memory
No clock or timing strobe required
Equal access and cycle times
Directly TTL compatible
All inputs and outputs
400-mil 44-pin SOJ package
Center VCC and VSS type pinout
Ordering Information
Type No.
HM621664HBJP-15
HM621664HBJP-20
HM621664HBLJP-15
HM621664HBLJP-20
Access time
15 ns
20 ns
15 ns
20 ns
Package
400-mil 44-pin plastic SOJ (CP-44D)


Hitachi Power Semiconductor Device Electronic Components Datasheet

HM621664HB Datasheet

1M High Speed SRAM

No Preview Available !

HM621664HB Series
Pin Arrangement
HM621664HBJP/HBLJP Series
A4 1
A3 2
A2 3
A1 4
A0 5
CS 6
I/O1 7
I/O2 8
I/O3 9
I/O4 10
VCC
VSS
I/O5
11
12
13
I/O6 14
I/O7 15
I/O8 16
WE 17
A15 18
A14 19
A13 20
A12 21
NC 22
44 A5
43 A6
42 A7
41 OE
40 UB
39 LB
38 I/O16
37 I/O15
36 I/O14
35 I/O13
34 VSS
33 VCC
32 I/O12
31 I/O11
30 I/O10
29 I/O9
28 NC
27 A8
26 A9
25 A10
24 A11
23 NC
(Top View)
Pin Description
Pin name
A0 – A15
I/O1 – I/O16
CS
OE
WE
UB
LB
VCC
VSS
NC
Function
Address input
Data input/output
Chip select
Output enable
Write enable
Upper byte select
Lower byte select
Power supply
Ground
No connection
2


Part Number HM621664HB
Description 1M High Speed SRAM
Maker Hitachi Semiconductor
Total Page 16 Pages
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