AC ELECTRICAL CHARACTERISTICS 1, 2, 3 Test Conditions: T<" />
參數(shù)資料
型號: XR88C681CP/40
廠商: Exar Corporation
文件頁數(shù): 91/101頁
文件大?。?/td> 0K
描述: IC UART CMOS DUAL 40PDIP
產(chǎn)品變化通告: Leaded UART, V&I Obsolescence 11/Apr/2011
標準包裝: 9
特點: *
通道數(shù): 2,DUART
FIFO's: 1 字節(jié),3 字節(jié)
電源電壓: 4.75 V ~ 5.25 V
帶并行端口:
帶CMOS:
安裝類型: 通孔
封裝/外殼: 40-DIP(0.600",15.24mm)
供應商設備封裝: 40-PDIP
包裝: 管件
XR88C681
9
Rev. 2.11
AC ELECTRICAL CHARACTERISTICS 1, 2, 3
Test Conditions:
TA = 0 - 70°C, VCC = 5V 5% unless otherwise specified.
Symbol
Parameter
Min.
Typ.
Max.
Unit
Conditions
Reset Timing (See Figure 51)
tRES
RESET Pulse Width
1.0
A
XR88C681 Read and Write Cycle Timing (Figure 52)4
tAS
A0-A3 Setup Time to RD, WR
Low
10
ns
tAH
A0-A3 Hold Time from RD, WR
Low
0
ns
tCS
CS Setup Time to RD, WR Low
0
ns
tCH
CS Hold Time from -RD, -WR
High
0
ns
tRW
-RD, -WR Pulse Width
225
ns
tDD
Data Valid from -RD Low
60
175
ns
tDF
Data Bus Floating from -RD High
10
100
ns
tDS
Data Setup Time to -WR High
100
ns
tDH
Data Hold Time from -WR High
5
ns
tRWD
High Time Between Reads
and/or Writes5, 6
100
ns
Z-Mode Interrupt Cycle Timing (Figure 53)
tDIO
IEO Delay Time from IEI
100
ns
tIAS
-IACK Setup Time to -RD Low7
ns
tIAH
-IACK Hold Time from -RD High
0
ns
tEIS
IEI Setup Time to RD Low
50
ns
tEOD
IEO Delay Time from -INTR Low
100
ns
Port Timing (Figure 54)4
tPS
Port Input Setup Time to
-RD/-CS Low
0
ns
tPH
Port Input Hold Time from
-RD/-CS High
0
ns
tPD
Port Output Valid from -WR/-CS
High
400
ns
Interrupt Output Timing (Figure 55)
tIR
-INTR or OP3 - OP7 when used
as Interrupts High from: Clear of
Interrupts Status Bits in ISR or
IPCR Clear of Interrupt Mask in
IMR
300
ns
Clock Timing (Figure 56)
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