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x 16-bit. HM6216255HC Datasheet |
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HM6216255HC Series
4M High Speed SRAM (256-kword × 16-bit)
ADE-203-1196 (Z)
Preliminary
Rev. 0.0
Oct. 31, 2000
Description
The HM6216255HC Series is a 4-Mbit high speed static RAM organized 256-k word × 16-bit. It has realized
high speed access time by employing CMOS process (6-transistor memory cell) 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. It is packaged in 400-
mil 44-pin plastic SOJ and 400-mil 44-pin plastic TSOPII.
Features
• Single 5.0 Vsupply : 5.0 V ± 10 %
• Access time: 10 ns (max)
• Completely static memory
No clock or timing strobe required
• Equal access and cycle times
• Directly TTL compatible
All inputs and outputs
• Operating current: 170 mA (max)
• TTL standby current: 40 mA (max)
• CMOS standby current: 5 mA (max)
: 1.2 mA (max) (L-version)
• Data retansion current: 0.8 mA (max) (L-version)
• Data retantion voltage: 2 V (min) (L-version)
• Center VCC and VSS type pinout
Preliminary: The specification of this device are subject to change without notice. Please contact your
nearest Hitachi’s Sales Dept. regarding specification.
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HM6216255HC Series
Ordering Information
Type No.
HM6216255HCJP-10
HM6216255HCLJP-10
HM6216255HCTT-10
HM6216255HCLTT-10
Access time
10 ns
10 ns
10 ns
10 ns
Package
400-mil 44-pin plastic SOJ (CP-44D)
400-mil 44-pin plastic TSOPII (TTP-44DE)
2
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Pin Arrangement
44-pin SOJ
A0 1
A1 2
A2 3
A3 4
A4 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
A5 18
A6 19
A7 20
A8 21
A9 22
44 A17
43 A16
42 A15
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 A14
26 A13
25 A12
24 A11
23 A10
(Top View)
Pin Description
Pin name
A0 to A17
I/O1 to I/O16
CS
OE
WE
Function
Address input
Data input/output
Chip select
Output enable
Write enable
HM6216255HC Series
44-pin TSOP
A0
A1
A2
A3
A4
CS
I/O1
I/O2
I/O3
I/O4
VCC
VSS
I/O5
I/O6
I/O7
I/O8
WE
A5
A6
A7
A8
A9
1 44
2 43
3 42
4 41
5 40
6 39
7 38
8 37
9 36
10 35
11 34
12 33
13 32
14 31
15 30
16 29
17 28
18 27
19 26
20 25
21 24
22 23
(Top View)
A17
A16
A15
OE
UB
LB
I/O16
I/O15
I/O14
I/O13
VSS
VCC
I/O12
I/O11
I/O10
I/O9
NC
A14
A13
A12
A11
A10
Pin name
UB
LB
VCC
VSS
NC
Function
Upper byte select
Lower byte select
Power supply
Ground
No connection
3
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