723632-20 Просмотр технического описания (PDF) - Integrated Device Technology
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723632-20 Datasheet PDF : 26 Pages
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IDT723622/723632/723642 CMOS SyncBiFIFO™
256 x 36 x 2, 512 x 36 x 2, 1024 x 36 x 2
COMMERCIAL TEMPERATURE RANGE
DESCRIPTION (CONTINUED)
Full and almost Empty) to indicate when a selected number of
words is stored in memory. Communication between each
port may bypass the FIFOs via two 36-bit mailbox registers.
Each mailbox register has a flag to signal when new mail has
been stored. Two or more devices may be used in parallel to
create wider data paths.
The IDT723622/723632/723642 is a synchronous (clocked)
FIFO, meaning each port employs a synchronous interface.
All data transfers through a port are gated to the LOW-to-
HIGH transition of a port clock by enable signals. The clocks
for each port are independent of one another and can be
asynchronous or coincident. The enables for each port are
arranged to provide a simple bidirectional interface between
microprocessors and/or buses with synchronous control.
The Input Ready (IRA, IRB) and Almost-Full (AFA, AFB)
flags of a FIFO are two-stage synchronized to the port clock
that writes data into its array. The Output Ready (ORA, ORB)
and Almost-Empty (AEA, AEB) flags of a FIFO are two-stage
synchronized to the port clock that reads data from its array.
Offset values for the Almost-Full and Almost-Empty flags of
both FIFOs can be programmed from Port A.
The IDT723622/723632/723642 is characterized for op-
eration from 0°C to 70°C.
PIN CONFIGURATION
NC 18
B35 19
B34 20
B33 21
B32 22
GND 23
B31 24
B30 25
B29 26
B28 27
B27 28
B26 29
VCC 30
B25 31
B24 32
GND 33
B23 34
B22 35
B21 36
B20 37
B19 38
B18 39
GND 40
B17 41
B16 42
VCC 43
B15 44
B14 45
B13 46
B12 47
GND 48
NC 49
NC 50
NOTES:
1. NC – no internal connection
2. Uses Yamaichi socket IC51-1324-828
PQ132-1
PQF Package
TOP VIEW
5.22
116 NC
115 NC
114 A35
113 A34
112 A33
111 A32
110 VCC
109 A31
108 A30
107 GND
106 A29
105 A28
104 A27
103 A26
102 A25
101 A24
100 A23
99 GND
98 A22
97 VCC
96 A21
95 A20
94 A19
93 A18
92 GND
91 A17
90 A16
89 A15
88 A14
87 A13
86 VCC
85 A12
84 NC
3022 drw 02
2
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