8x300 design guide - Al Kossow's Bitsavers - Trailing-Edge

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FLOPPY DISK FORMATTER fGONTROLLER 81330
BIPOLAR LSI DIVISION
AC CHARACTERISTICS (eont'd) vee = 5V (±5%), TA = ooe to 70 0 e
MNEMONIC REFERENCE INPUT OUTPUT Min Typ Max COMMENTS
tHO (ME hold
time)
MCLK\.-
ME
tHO (Se hold
se
time) ~
tHO (We hold
time)
we
~
NOTES
1. Write pulse width = 2/FXTAL' that is. for 8MHz crystal. tpw = 250l1sec (typical)
2. Changes on OS 1-5 are not stored in read mode (ME = O. SC = O. and WC = 0)
3. During the period when MCLK is high. measurement is made with ME = Low. SC = Low.
and WC = High.
Ons
Ons
Ons
TEST LOADING CIRCUIT
CIRCUIT #1 CIRCUIT #2
CIRCUIT #3
+sv
i-l
POINT
RL
1100
FROM OUTPUT
FROM OUTPUT
UNDER TEST . UNDER TEST
CL _~ CL
-- 300pF
130pF
J-
+sv
)
RLl
sosO
~ RL2
: 54S0
FROM OUTPUT "
~
UNDER TEST
1 CL
TSOpF
~
+sv
q
... ~ RLl
... ~ 2320
RL2
.~ 1890
INPUT
3
OUTPUT
PROPAGATION DELAY TIME
1.SV \
1\----------------
, ~'Pd--t ,
:~C-----·
, 1.SV
--------------,
SETUP & HOLD TIMES
REFERENCE *:~--------
----------. I .
.. 'SETUP ..J, __ 'HOLD-+I
, I
____ 0\ I
DATA/CONTROL 1.SV 1.SV
--....I ',_________,
! r----
1.SV
PULSE WIDTH WAVEFORM
1"------
,
t--'Pw----I~
I
,
./K
-" X
OUTPUT ENABLE AND DISABLE TIMES
iVo--IV7
CONTROL \1 I
INPUT ,,1.SV 1 1 . SV
DATA ,I , .SV I
OUTPUT = 0
'I I
--~--~~--------_+_r~----
DATA
OUTPUT = 1
I ·----------'1 ~.-----
, "
'4tOE..I ~
VOL
--~--~-r--------_+~~--- VOH
!ijgDOliC!i
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