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參數(shù)資料
| 型號(hào)： | TC55V400AFT-70 |
| 廠商： | Toshiba Corporation |
| 英文描述： | 262,144-WORD BY 16-BIT FULL CMOS STATIC RAM |
| 中文描述： | 262,144字由16位完整的CMOS靜態(tài)RAM |
| 文件頁數(shù)： | 1/11頁 |
| 文件大?。?/td> | 173K |
| 代理商： | TC55V400AFT-70 |
TC55V400AFT-55,-70
2001-09-04 1/11
262,144-WORD BY 16-BIT FULL CMOS STATIC RAM
DESCRIPTION
TOSHIBA MOS DIGITAL INTEGRATED CIRCUIT SILICON GATE CMOS
The TC55V400AFT is a 4,194,304-bit static random access memory (SRAM) organized as 262,144 words by 16
bits. Fabricated using Toshiba's CMOS Silicon gate process technology, this device operates from a single 2.3 to 3.6
V power supply. Advanced circuit technology provides both high speed and low power at an operating current of 3
mA/MHz and a minimum cycle time of 55 ns. It is automatically placed in low-power mode at 0.5 A standby
current (at V
DD
3 V, Ta 25°C, maximum) when chip enable (
CE1
) is asserted high or (CE2) is asserted low.
There are three control inputs.
CE1
and CE2 are used to select the device and for data retention control, and
output enable (
OE
) provides fast memory access. Data byte control pin (
LB
,
UB
) provides lower and upper byte
access. This device is well suited to various microprocessor system applications where high speed, low power and
battery backup are required. And, with a guaranteed operating extreme temperature range of 40° to 85°C, the
TC55V400AFT can be used in environments exhibiting extreme temperature conditions. The TC55V400AFT is
available in normal and reverse pinout plastic 48-pin thin-small-outline package (TSOP).
FEATURES
Low-power dissipation
Operating: 10.8 mW/MHz (typical)
Single power supply voltage of 2.3 to 3.6 V
Power down features using
CE1
and CE2
Data retention supply voltage of 1.5 to 3.6 V
Direct TTL compatibility for all inputs and outputs
Wide operating temperature range of 40° to 85°C
Standby Current (maximum):
3.6 V
3.0 V
7 A
5 A
PIN ASSIGNMENT
(TOP VIEW)
PIN NAMES
48 PIN TSOP
A0~A17
Address Inputs
1
CE
, CE2
Chip Enable
R/W
Read/Write Control
OE
Output Enable
LB
,
UB
Data Byte Control
I/O1~I/O16
Data Inputs/Outputs
V
DD
GND
Power
Ground
NC
No Connection
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin Name
A15
A14
A13
A12
A11
A10
A9
A8
NC
NC
R/W
CE2
NC
UB
LB
NC
Pin No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Pin Name
A17
A7
A6
A5
A4
A3
A2
A1
A0
1
CE
GND
OE
I/O1
I/O9
I/O2
I/O10
Pin No.
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Pin Name
I/O3 I/O11
I/O4 I/O12 V
DD
I/O5
I/O13
I/O6
I/O14
I/O7
I/O15
I/O8 I/O16 GND
NC
A16
Access Times (maximum):
TC55V400AFT
-55
-70
Access Time
55 ns
70 ns
1
CE
Access Time
55 ns
70 ns
CE2 Access Time
55 ns
70 ns
OE
Access Time
30 ns
35 ns
Package:
TSOP
Ⅰ
48-P-1214-0.50 (AFT) (Weight: 0.38 g typ)
(Normal)
25
48
24
1
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