Intel mcs-48 manual Symbol Parameter, MIN MAX Units

8155/8156/8155~218156-2

A.C. CHARACTERISTICS ITA =o°c to 70°C; VCC =5V ± 5%)

SYMBOL	PARAMETER
	'.'
tAL	Address to Latch Set Up Time
tLA	Address Hold Time after Latch
tlC	Latch to READ/WR ITE Control
tRO	Valid Data Out Delay from READ Control
tAO	Address Stable to Data Out Valid
tll	Latch Enable Width
tROF	Data Bus Float After READ
tCl	READ/WRITE Control to Latch Enable
tcc	READ/WRITE Control Width
tow	Data In to WR ITE Set Up Time
two	Data In Hold Time After WR ITE
tRV	Recovery Time Between Controls
twp	WR ITE to Port Output
tPR	Port Input Setup Time
tRP	Port Input Hold Time
tSBF	Strobe to Buffer Full
tss	strobe Width
tRBE	READ to Buffer Empty
tSI	Strobe to INTR On
tROI	READ to INTR Off
tPSS	Port Setup Time to Strobe Strobe
tPHS	Port Hold Time After Strobe
tSBE	Strobe to Buffer Empty
tWBF	WR ITE to Buffer Full
tWI	WR ITE to INTR Off
tTL	TIMER·INto TIMER·OUT Low
tTH	TIMER·INto TIMER·OUT High
tROE	Data Bus Enable from READ Control
tl	TIMER·IN Low Time
t2	TIMER·IN High Time

8155/8156		8155·2/8156-2
		(Preliminary)
MIN.	MAX.	MIN.	MAX.	UNITS
50		30		ns
80		30		ns
100		40		ns'
	170		140	ns
	400		330	ns
100		70		ns
0	100	0	80	ns
20		10		ns
250		200		ns
150		100		ns
0		0		ns
300		200		ns
	400		300	ns
70		50		ns
50		10		ns
	400		300	ns
200		150		ns
	400		300	ns
	400		300	ns
	400		300	ns
50		0		ns
120		100		ns
	400		300	ns
	400		300	ns
	400		300	ns
	400		300	ns
	400		300	ns
10		10		ns
80		40		ns
120		70		ns

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