參數(shù)資料
型號: DS21554LN
廠商: DALLAS SEMICONDUCTOR
元件分類: Digital Transmission Interface
英文描述: DATACOM, PCM TRANSCEIVER, PQFP100
封裝: 14 X 14 MM, LQFP-100
文件頁數(shù): 7/117頁
文件大?。?/td> 698K
代理商: DS21554LN
DS21354 & DS21554
104 of 117
NOTES:
1. Applies to RVDD, TVDD, and DVDD.
2. TCLK = TCLKI = RCLKI = TSYSCLK = RSYSCLK = MCLK = 2.048 MHz; outputs open
circuited.
3. 0.0V < VIN < VDD.
4. Applied to INT* when 3–stated.
21 AC TIMING PARAMETERS AND DIAGRAMS
21.1 Multiplexed Bus AC Characteristics
AC CHARACTERISTICS – MULTIPLEXED PARALLEL PORT (MUX = 1)
[See Figure 21-1 to Figure 21-3]
(0
°°°°C to 70°°°°C; VDD = 3.3V ±±±± 5% for DS21354L;
0
°°°°C to 70°°°°C; VDD = 5.0V ±±±± 5% for DS21554L;
-40
°°°°C to +85°°°°C; VDD = 3.3V ±±±± 5% for DS21354LN;
-40
°°°°C to +85°°°°C; VDD = 5.0V ±±±± 5% for DS21554LN)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
NOTES
Cycle Time
tCYC
200
ns
Pulse Width, DS low or RD* high
PWEL
100
ns
Pulse Width, DS high or RD* low
PWEH
100
ns
Input Rise/Fall times
tR , tF
20
ns
R/W* Hold Time
tRWH
10
ns
R/W* Set Up time before DS high
tRWS
50
ns
CS* Set Up time before DS, WR* or RD*
active
tCS
20
ns
CS* Hold time
tCH
0ns
Read Data Hold time
tDHR
10
50
ns
Write Data Hold time
tDHW
0ns
Muxed Address valid to AS or ALE fall
tASL
15
ns
Muxed Address Hold time
tAHL
10
ns
Delay time DS, WR* or RD* to AS or
ALE rise
tASD
20
ns
Pulse Width AS or ALE high
PWASH
30
ns
Delay time, AS or ALE to DS, WR* or
RD*
tASED
10
ns
Output Data Delay time from DS or RD*
tDDR
20
80
ns
Data Set Up time
tDSW
50
ns
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