ꢀꢁꢂꢃꢄꢅꢆꢇꢄꢈꢆꢇꢁꢂꢉꢀꢆꢊꢋꢌꢍꢁꢄꢎꢏꢐꢑꢄꢑꢒꢓꢏ
ꢔꢕꢖꢄꢗꢄꢘꢄꢙꢚꢋ
WS
WS62256
!ꢀꢁꢂꢃꢄꢅꢆꢇꢈꢆꢉꢊ
!ꢀꢋꢂꢌꢈꢍꢅꢂꢃ
power CMOS
iꢁsꢁꢁ a high performance , very low
The WS62256
ꢀꢁꢁ
ꢁꢁ 4.5V~5.5V
Oꢁ
peration
ꢁꢁ
ꢁ
voltage Vcc:
ꢁ
ꢀꢁꢂ! #ꢁ"ꢃ$ꢁ%ꢃ$! ꢁ,ꢃ(-ꢄꢅ%ꢆ'ꢃ(ꢁ+
ꢁꢁꢁꢁꢁ
ꢑꢆ&ꢆ',ꢁ;&(2ꢃꢅꢁꢋ,,!--ꢁ0!ꢅꢃ #ꢁꢃ *&('<!2ꢁꢁ&-ꢁꢖꢍ:ꢗꢘꢙꢁꢁ$ꢃ 2-ꢁꢁ3#ꢁꢙꢁ3'ꢆ-
supply
range of 4.5V
ꢁꢁꢁ
&(2ꢁꢁꢃ%! &ꢆ!-ꢁꢁ9 ꢃꢅꢁ&(ꢁꢁ)! #ꢁꢁ"ꢃ$ꢁꢁ
)ꢃ"ꢆ&*!ꢈ
to 5.5V
ꢁ
ꢁ
ꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁ
ꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁ
ꢁꢁꢁꢁꢁꢁꢂ,,ꢁ.ꢁꢇꢈꢉꢂꢁꢁꢁꢁꢁꢊꢇꢅꢋꢁ/0&ꢌꢈ1ꢁ$ 'ꢆ!ꢁ,ꢄ !(ꢆ
ꢋ2)&(,!2ꢁꢁꢏ0ꢐꢑꢁꢁꢆ!,5(ꢃ"ꢃ*#ꢁ&(2ꢁ,' ,ꢄ'ꢆꢁꢆ!,5('=ꢄ!-ꢁ% ꢃ)'2!ꢁ3ꢃꢆ5ꢁ5'*5
-%!!2ꢁ&(2ꢁ"ꢃ$ꢁꢁ%ꢃ$! ꢁ9!&ꢆꢄ !-ꢁ$'ꢆ5ꢁ&ꢁꢆ#%',&"ꢁꢏ0ꢐꢑꢁ-ꢆ&(23#ꢁ,ꢄ !(ꢆꢁꢃ9
ꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢍꢅꢋꢁ/0&ꢌꢈ1ꢁ !&2ꢁ,ꢄ !(ꢆ
ꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢁꢉꢈꢊꢄꢋꢁꢁ/ꢎ#%ꢈ1ꢁꢏ0ꢐꢑꢁ-ꢆ&(23#ꢁ,ꢄ !(ꢆ
ꢈ
ꢕ&-#ꢁꢁꢁꢅ!ꢅꢃ #ꢁꢁꢁ!ꢌ%&(-'ꢃ(ꢁꢁꢁ'-ꢁꢁꢁ% ꢃ)'2!2ꢁꢁꢁ3#ꢁꢁꢁ&(ꢁꢁꢁ&,ꢆ')!ꢁꢁꢁ>ꢐ?ꢁꢁꢁ,5'%
0.4uA and maxinum access time of 70ns in5V operation
ꢀꢁ4'*5ꢁ-%!!2ꢁ&,,!--ꢁꢆ'ꢅ!ꢁ+ꢁ
!(&3"!ꢁ/ꢏꢕ1:ꢁꢁ&(2ꢁꢁꢁ&,ꢆ')!ꢁꢁ>ꢐ?ꢁꢁꢃꢄꢆ%ꢄꢆꢁꢁꢁ!(&3"!ꢁ/ꢐꢕ1ꢁꢁ&(2ꢁꢁꢆ5 !!ꢓ-ꢆ&ꢆ!
ꢃꢄꢆ%ꢄꢆꢁ2 ')! -ꢈ
70ns
ꢀꢁꢒ(%ꢄꢆꢁ"!)!"-ꢁ& !ꢁꢏ0ꢐꢑꢓ,ꢃꢅ%&ꢆ'3"!
ꢁꢁꢁꢁꢁ
-70
( 0&ꢌꢈ1ꢁ
The WS62256 has an automatic power down feature, reducing the
%ꢃ$! ꢁ,ꢃ(-ꢄꢅ%ꢆ'ꢃ(ꢁ-'*('9',&(ꢆ"#ꢁ$5!(ꢁ,5'%ꢁ'-ꢁ2!-!"!,ꢆ!2ꢈ
ꢀꢁꢋꢄꢆꢃꢅ&ꢆ',ꢁ%ꢃ$! ꢁ2ꢃ$(ꢁ$5!(ꢁ,5'%ꢁ'-ꢁ2!-!"!,ꢆ!2
ꢀꢁꢎ5 !!ꢁ-ꢆ&ꢆ!ꢁꢃꢄꢆ%ꢄꢆ-
WS62256 is
ꢎ5!ꢁꢁꢁꢁꢁꢁꢁ
ꢁ&)&'"&3"!ꢁꢁꢁ'(ꢁꢁꢁꢆ5!ꢁꢁꢁ@ꢕ7ꢕꢏꢁꢁꢁ-ꢆ&(2& 2ꢁꢁꢁꢍꢙꢁꢁꢁ%'(
ꢀꢁ6ꢄ""#ꢁ-ꢆ&ꢆ',ꢁꢃ%! &ꢆ'ꢃ(
ꢀꢁ7&ꢆ&ꢁ !ꢆ!(ꢆ'ꢃ(ꢁ-ꢄ%%"#ꢁ)ꢃ"ꢆ&*!ꢁ&-ꢁ"ꢃ$ꢁ&-ꢁꢔꢈꢇꢂ
ꢁꢁꢁ
330mil
ꢁꢚ"&-ꢆ',ꢁꢁꢑꢐꢚ:ꢁꢁ&(2ꢁꢁꢁ
600mil plastic DIP
ꢀꢁꢕ&-#ꢁ!ꢌ%&(-'ꢃ(ꢁ$'ꢆ5ꢁꢏꢕꢁ&(2ꢁꢐꢕꢁꢃ%ꢆ'ꢃ(-
ꢀꢁꢋ""ꢁꢒ8ꢐꢁ%'(-ꢁ& !ꢁꢇꢂꢁꢆꢃ"! &(ꢆ
PRODUCT FAMILY
PRODUCT
OPERATING
Vcc
SPEED
POWER DISSIPATION
FAMILY
TEMPERATURE
(V)
(ns)
STANDBY(Iccs
B
1,Max)
Operating (Icc,Max)
Vcc=5.0V
PKG TYPE
Vcc=5.0V
DIP-28
WS62256LLP
WS62256LLFP
0oC~+70oC
1uA
4.5V~5.5V
SOP-28
45mA
70ns
PIN CONFIGURATION
!ꢀꢎꢏꢉꢄꢐꢀꢁꢆꢌꢑꢅꢌꢒ
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
A14
ꢀꢗ
ꢀꢁ
2
A12
A7
A6
A5
A4
A3
A2
A1
WE
A13
ꢀ*
ꢀꢂꢂꢃꢄꢅꢅ
3
ꢒꢄꢓꢎꢃꢔꢕꢀꢃꢃꢖꢔ
ꢗꢘꢙꢕꢚꢕꢗꢘꢙ
ꢀꢘꢙ
ꢀꢘ+
ꢀꢘ$
ꢘ-
ꢗꢘꢙ
ꢍꢎꢏ
ꢐꢄꢑꢎꢂꢄꢃ
ꢆꢇꢈꢉꢊ
4
A8
ꢋꢉꢌꢌꢄꢃ
ꢀ-
ꢀ,
5
A9
ꢀꢘꢘ
6
A11
ꢗꢘꢙ
7
OE
ꢐ)%
ꢐ)ꢘ
ꢐ)ꢙ
ꢐ)$
ꢐ)+
ꢐ)ꢗ
ꢐ)ꢁ
ꢐ)*
-
ꢐꢖꢊꢖ
ꢆꢇꢈꢉꢊ
ꢋꢉꢌꢌꢄꢃ
-
ꢛꢎꢜꢉꢓꢇꢕꢆꢝꢞ
8
A10
__
ꢃ!ꢊꢄꢕꢐꢃ!"ꢄꢃ
9
#ꢄꢇꢅꢄꢕꢀꢓꢈ
CE
-
-
ꢐꢖꢊꢖ
ꢞꢉꢊꢈꢉꢊ
ꢋꢉꢌꢌꢄꢃ
DQ7
DQ6
10
11
12
13
14
ꢁ+
A0
DQ0
ꢛꢎꢜꢉꢓꢇꢕꢐꢄꢑꢎꢂꢄꢃ
ꢘꢙ
DQ1
DQ2
DQ5
DQ4
DQ3
ꢛ(
ꢛꢎꢇꢊꢃꢎꢜ
(
ꢀꢂꢂꢃꢄꢅꢅꢕꢆꢇꢈꢉꢊꢕꢋꢉꢌꢌꢄꢃ
ꢞ(
GND
'ꢂꢂ
&ꢇꢂ
ꢀ+ ꢀ$ ꢀꢙ ꢀꢘ ꢀ% ꢀꢘ%
DIP-28
SOP-28
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Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage: http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com
9-1
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