Intel 8080 manual Characteristics TA = Oc to 70C Vee = 5V ±5%, TE~r, Waveforms, CL = 25pF

SCHOTTKY BIPOLAR 8228

WAVEFORMS

STATUS STROBE

8080 DATA BUS

-----...".I'~~+--,.,.I"--------------------

DBIN

HLDA --------+----+-----'1

INTA, lOR, MEMR

DURING HLDA

SYSTEM BUS DURING READ

8080 BUS DURING READ· - - - - - - - - -

lOW OR MEMW
8080 BUS DURING WRITE
SYSTEM BUS DURING WRITE - -	- -	-	- -	- -	< ~
					we1=	.-	j	1
SYSTEM BUS ENABLE .
SYSTEM BUS OUTPUTS - -	- -	-	- -	- -	- - - -		- -	tE~r
								< t --> - - - - - - - - - - - - - -

VOLTAGE MEASUREMENT POINTS: 00-07 (when outputs) Logic "0" = 0.8V, Logic "1" = 3.0V. All other signals measured at 1.5V.

A.C. Characteristics TA = O°c to 70°C; Vee = 5V ±5%.

Symbol	Parameter
tpw	Width of Status Strobe
tss	Setup Time, Status Inputs Do-D7
tSH	Hold Time, Status Inputs Do-D7
toe	Delay from STSTB to any Control Signal
tRR	Delay from DB IN to Control Outputs
tRE	Delay from DBIN to Enable/Disable 8080 Bus
tAD	Delay from System Bus·to 8080 Bus during Read
tWA	Delay from WR to Control Outputs
tWE	Delay to Enable System Bus DBo-DB7 after STSTB
two	Delay from 8080 Bus Do-D7 to System Bus
	DBo-DB7 during Write
tE	Delay from System Bus Enable to System Bus DBo-DB7
tHO	HLDA to Read Status Outputs
tos	Setup Time, System Bus Inputs to HLDA
tOH	Hold Time, System Bus Inputs to HLDA

Limits
Min.	Max.	Units	Condition
22		ns
8		ns
5		ns
20	60	ns	CL = 100pF
	30	ns	CL = 100pF
	45	ns	CL = 25pF
	30	ns	CL = 25pF
5	45	ns	CL = 100pF
	30	ns	CL = 100pF
		ns	CL = 100pF
5	40
	30	ns	CL = 100pF
	25	ns
10		ns
20		ns	CL = 100pF
		\

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