參數(shù)資料
型號(hào)： 933715220112
廠商： NXP SEMICONDUCTORS
元件分類： FIFO
英文描述： 16 X 4 OTHER FIFO, 120 ns, PDSO16
封裝： 3.90 MM, PLASITC, MS-012AC, SOT-109-1, SO-16
文件頁(yè)數(shù)： 12/25頁(yè)
文件大?。?/td> 178K
代理商： 933715220112
1998 Jan 23
2
Philips Semiconductors
Product specication
4-bit x 16-word FIFO register
74HC/HCT40105
FEATURES
Independent asynchronous inputs and outputs
Expandable in either direction
Reset capability
Status indicators on inputs and outputs
3-state outputs
Output capability: standard
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT40105 are high-speed Si-gate CMOS
devices and are pin compatible with the “40105” of the
“4000B” series. They are specified in compliance with
JEDEC standard no. 7A.
The 74HC/HCT40105 are first-in/first-out (FIFO) “elastic”
storage registers that can store sixteen 4-bit words. The
“40105” is capable of handling input and output data at
different shifting rates. This feature makes it particularly
useful as a buffer between asynchronous systems. Each
word position in the register is clocked by a control flip-flop,
which stores a marker bit. A “1” signifies that the position’s
data is filled and a “0” denotes a vacancy in that position.
The control flip-flop detects the state of the preceding
flip-flop and communicates its own status to the
succeeding flip-flop. When a control flip-flop is in the “0”
state and sees a “1” in the preceding flip-flop, it generates
a clock pulse that transfers data from the preceding four
data latches into its own four data latches and resets the
preceding flip-flop to “0”. The first and last control flip-flops
have buffered outputs. Since all empty locations “bubble”
automatically to the input end, and all valid data ripples
through to the output end, the status of the first control
flip-flop (data-in ready output - DIR) indicates if the FIFO is
full, and the status of the last flip-flop (data-out ready
output - DOR) indicates if the FIFO contains data. As the
earliest data is removed from the bottom of the data stack
(output end), all data entered later will automatically ripple
toward the output.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
Notes
1. CPD is used to determine the dynamic power dissipation (PD in W):
PD = CPD × VCC2 × fi +∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz.
fo = output frequency in MHz.
∑ (CL × VCC2 × fo) = sum of outputs
CL = output load capacitance in pF
VCC = supply voltage in V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC 1.5
SYMBOL
PARAMETER
CONDITIONS
TYP.
UNIT
HC
HCT
tPHL/ tPLH
propagation delay
CL = 15 pF; VCC =5 V
MR to DIR, DOR
16
15
ns
SO to Qn
37
35
ns
tPHL
propagation delay
SI to DIR
16
18
ns
SO to DOR
17
18
ns
fmax
maximum clock frequency
33
31
MHz
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
134
145
pF
相關(guān)PDF資料
PDF描述
935189070118 16 X 4 OTHER FIFO, 600 ns, PDSO16
935189960112 16 X 4 OTHER FIFO, 120 ns, PDSO16
935189350112 16 X 4 OTHER FIFO, 600 ns, PDSO16
933715220118 16 X 4 OTHER FIFO, 120 ns, PDSO16
935189350118 16 X 4 OTHER FIFO, 600 ns, PDSO16
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