VEE D0 VCC Q NC
參數(shù)資料
型號: MC100EP195BMNR4G
廠商: ON Semiconductor
文件頁數(shù): 4/17頁
文件大小: 0K
描述: IC DELAY LINE 1024TAP 32-QFN
標準包裝: 1
系列: 100EP
標片/步級數(shù): 1024
功能: 可編程
延遲到第一抽頭: 2.5ns
接頭增量: 10ps
可用的總延遲: 2.2ns ~ 12.2ns
獨立延遲數(shù): 1
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應商設備封裝: 32-QFN(5x5)
包裝: 剪切帶 (CT)
其它名稱: MC100EP195BMNR4GOSCT
MC100EP195B
http://onsemi.com
12
VEE
D0
VCC
Q
NC
VCC
CASCADE
EN
SETMAX
V
CC
V
EE
LEN
D2 D1
CASCADE
SETMIN
VBB
IN
VEE
D8
VEF
D3
D4
D5
D6
D7
D9
D10
IN
VCF
INPUT
OUTPUT
VEE
D0
VCC
Q
NC
VCC
CASCADE
EN
SETMAX
V
CC
V
EE
LEN
D2 D1
CASCADE
SETMIN
VBB
IN
VEE
D8
VEF
D3
D4
D5
D6
D7
D9
D10
IN
VCF
EP195B
CHIP #2
EP195B
CHIP #1
ADDRESS BUS
A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
Need if Chip #3 is used
Figure 5. Cascading Interconnect Architecture
An expansion of the latch section of the block diagram is
pictured in Figure 6. Use of this diagram will simplify the
explanation of how the cascade circuitry works. When D10
of chip #1 in Figure 5 is LOW this device’s
CASCADE output will also be low while the CASCADE
output will be high. In this condition the SET MIN pin of
chip #2 will be asserted HIGH and thus all of the latches of
chip #2 will be reset and the device will be set at its minimum
delay.
Chip #1, on the other hand, will have both SET MIN and
SET MAX deasserted so that its delay will be controlled
entirely by the address bus A0—A9. If the delay needed is
greater than can be achieved with 1023 gate delays
(1111111111 on the A0—A9 address bus) D10 will be
asserted to signal the need to cascade the delay to the next
EP195B device. When D10 is asserted, the SET MIN pin of
chip #2 will be deasserted and SET MAX pin asserted
resulting in the device delay to be the maximum delay.
Table 11 shows the delay time of two EP195B chips in
cascade.
To expand this cascading scheme to more devices, one
simply needs to connect the D10 pin from the next chip to
the address bus and CASCADE outputs to the next chip in
the same manner as pictured in Figure 5. The only addition
to the logic is the increase of one line to the address bus for
cascade control of the second programmable delay chip.
SET
MIN
SET
MAX
TO SELECT MULTIPLEXERS
BIT 0
D0 Q0
LEN
Set Reset
BIT 1
D1 Q1
LEN
Set Reset
BIT 2
D2 Q2
LEN
Set Reset
BIT 3
D3 Q3
LEN
Set Reset
BIT 4
D4 Q4
LEN
Set Reset
BIT 5
D5 Q5
LEN
Set Reset
BIT 6
D6 Q6
LEN
Set Reset
BIT 7
D7 Q7
LEN
Set Reset
BIT 8
D8 Q8
LEN
Set Reset
BIT 9
D9 Q9
LEN
Set Reset
Figure 6. Expansion of the Latch Section of the EP195B Block Diagram
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