參數(shù)資料
型號(hào): IDT74ALVCH16721
廠商: Integrated Device Technology, Inc.
英文描述: 3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS AND BUS-HOLD
中文描述: 3.3V的CMOS 20位觸發(fā)器具有三態(tài)輸出和總線(xiàn)狀態(tài)保持
文件頁(yè)數(shù): 1/6頁(yè)
文件大小: 75K
代理商: IDT74ALVCH16721
INDUSTRIAL TEMPERATURE RANGE
IDT74ALVCH16721
3.3V CMOS 20-BIT FLIP-FLOP WITH 3-STATE OUTPUTS
1
J ANUARY 2004
INDUS T RIAL T E MPE RAT URE RANGE
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2004 Integrated Device Technology, Inc.
DSC-4747/2
FEATURES:
0.5 MICRON CMOS Technology
Typical t
SK(o)
(Output Skew) < 250ps
ESD > 2000V per MIL-STD-883, Method 3015; > 200V using
machine model (C = 200pF, R = 0)
V
CC
= 3.3V ± 0.3V, Normal Range
V
CC
= 2.7V to 3.6V, Extended Range
V
CC
= 2.5V ± 0.2V
CMOS power levels (0.4
μ
W typ. static)
Rail-to-Rail output swing for increased noise margin
Available in SSOP and TSSOP packages
FUNCTIONAL BLOCK DIAGRAM
APPLICATIONS:
3.3V high speed systems
3.3V and lower voltage computing systems
DRIV E FEATURES:
High Output Drivers: ±24mA
Low switching noise
IDT74ALVCH16721
3.3V CMOS 20-BIT
FLIP-FLOP WITH 3-STATE
OUTPUTS AND BUS-HOLD
DESCRIPTION:
This 20-bit flip-flop is built using advanced dual metal CMOS technology. The
20 flip-flops of the ALVCH16721 are edge-triggered D-type flip-flops with
qualified clock storage. On the positive transition of the clock (CLK) input, the
device provides true data at the Q outputs if the clock-enable (
CLKEN
) input
is low. If
CLKEN
is high, no data is stored.
A buffered output-enable (
OE
) input places the 20 outputs in either a normal
logic state (high or low) or a high-impedance state. In the high-impedance state,
the outputs neither load nor drive the bus lines significantly. The high-
impedance state and increased drive provide the capability to drive bus lines
without need for interface or pullup components.
OE
does not affect the internal
operation of the flip-flops. Old data can be retained or new data can be entered
while the outputs are in the high-impedance state.
The ALVCH16721 has been designed with a ±24mA output driver. This
driver is capable of driving a moderate to heavy load while maintaining speed
performance.
The ALVCH16721 has “bus-hold” which retains the inputs’ last state
whenever the input goes to a high impedance. This prevents floating inputs
and elimnates the need for pull-up/down resistor.
CLK
OE
CLKEN
D
1
1
56
29
55
CE
C1
1D
2
Q
1
TO 19 OTHER CHANNELS
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