參數(shù)資料
型號(hào)： lCM7217BlJl
廠商： Intersil Corporation
元件分類： 通用總線功能
英文描述： 4-Digit LED Display, Programmable Up/Down Counter
中文描述： 4位LED顯示，可編程加/減計(jì)數(shù)器
文件頁(yè)數(shù)： 4/19頁(yè)
文件大小： 137K
代理商： LCM7217BLJL
9-15
Switching Specifications
V
DD
= 5V, V
SS
= 0V, T
A
= 25
o
C
PARAMETER
MIN
TYP
MAX
UNIT
UP/DOWN Setup Time, t
UCS
300
-
-
ns
UP/DOWN Hold Time, t
UCH
1500
750
-
ns
COUNT Pulse Width High, t
CWH
250
100
-
ns
COUNT Pulse Width Low, t
CWI
250
100
-
ns
COUNT to CARRY/BORROW Delay, t
CB
-
750
-
ns
CARRY/BORROW Pulse Width t
BW
-
100
-
ns
COUNT to EQUAL Delay, t
CE
-
500
-
ns
COUNT to ZERO Delay, t
CZ
-
300
-
ns
RESET Pulse Width, t
RST
1000
500
-
ns
NOTES:
1. In the ICM7217 the UP/DOWN, STORE, RESET and the BCD I/O as inputs have pullup or pulldown devices which consume power when
connected to the opposite supply. Under these conditions, with the display off, the device will consume typically 750
μ
A.
2. These voltages are adjusted to allow the use of thumbwheel switches for the ICM7217. Note that a high level is taken as an input logic
zero for ICM7217 common-cathode versions.
3. Parameters not tested (Guaranteed by Design).
Timing Waveforms
FIGURE 1. MULTIPLEX TIMING
10
μ
s TYP
FREE-RUNNING
400
μ
s TYP
FREE-RUNNING
INTERDIGIT BLANK
D4
D3
D2
D1
SCAN
INTERNAL OSC
OUTPUT
INTERNAL
(BCD AND
SEGMENT
ENABLE)
INTERNAL
(COMMON
ANODE
DIGIT
STROBES)
D4
D3
D2
D1
ICM7217
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