CYM74S551PM-50C View Datasheet(PDF) - Cypress Semiconductor
Part Name
Description
Manufacturer
CYM74S551PM-50C Datasheet PDF : 8 Pages
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PRELIMINARY
CYM74B550
CYM74P550A
CYM74S550, CYM74S551
Logic Block Diagram - CYM74S550, CYM74S551
Note: A18 is not used by CYM74S550
TAGWE
DIRTYWE
DIRTYI
16Kx1
WE
DQ
A13:0
8Kx8 (CYM74S550)
32Kx8 (CYM74S551)
WE
D
A13:0
PD3
CYM74S550 NC
CYM74S551 NC
PD2 PD1
NC NC
GND NC
PD0
GND
GND
TAG7–TAG 0
A18–A3
ADSP
ADSC
ADV
SYNCS 0
ECDOE
CLK
WE7–WE 0
A18–A 5
A18–A 5
32Kx18(CYM74S550)
64Kx18(CYM74S551)
DIRTYO
A15:0
ADSP
ADSC
D
D63–D 0
ADV
CE
DP Pullup to VCC3
OE
CLK
MSB
WE 1:0
WE 1:0
WE 1:0
WE 1:0 LSB
WE 7:6
WE 5:4 WE 3:2 WE 1:0
74b550-3
Selection Guide
Part Number
Cache Size
System Clock
Data SRAM tAA
Tag SRAM tAA
Part Number
Cache Size
System Clock
Data SRAM tCO
Tag SRAM tAA
Part Number
Cache Size
System Clock
Data SRAM tCO
Tag SRAM tAA
74S550-50
50 MHz
12 ns
20 ns
74B550-50
50 MHz
25 ns
20 ns
Asynchronous Cache Modules
74B550-60
256 KB
60 MHz
15 ns
15 ns
74B550-66
66 MHz
15 ns
12 ns
74P550A-50
50 MHz
12 ns
20 ns
Synchronous Pipelined Cache Modules
74P550A-60
256 KB
60 MHz
9 ns
15 ns
74P550A-66
66 MHz
9 ns
12 ns
74S550-60
256 KB
60 MHz
9 ns
15 ns
Synchronous Burst Cache Modules
74S550-66
74S551-50
66 MHz
9 ns
12 ns
50 MHz
12 ns
20 ns
74S551-60
512 KB
60 MHz
9 ns
15 ns
74S551-66
66 MHz
9 ns
12 ns
3
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