TheTTL - Al Kossow's Bitsavers

SN54LS189A, SN54LS219A, SN74LS189A, SN74LS219A
64~BIT RANDOM·ACCESS MEMORIES
WITH 3·STATE OUTPUTS
electrical characteristics over recommended operating free-air temperature range (unless otherwise
noted)
SN54LS189A
SN74LS189A
PARAMETER TEST CONDITIONS t SN54LS219A SN74LS219A
MIN TYP* MAX MIN TYP* MAX
VIH High-level input voltage 2 2
VIL Low-level input voltage 0.7 0.8
VIK Input clamp voltage Vee = MIN, II = -18 rnA -1.5 -1.5
Vee = MIN, VIH = 2 V,
VOH High-level output voltage
2.4 3.1 2.4 3.1
VIL = VILmax, IOH = MAX
VOL Low-level output voltage
Vee = MIN, VIH = 2 V, IIOL = 12 rnA 0.25 0.4 0.25 0.4
VIL = VILmax IIOL = 24 rnA
0.35 0.5
Off-state output current Vee = MAX, VIH = 2 V,
10ZH high-level voltage applied VIL = VILmax, Va = 2.7 V
20 20
Off-state output current, Vee = MAX, VIH = 2 V,
10ZL low-level voltage applied VIL = VILmax, Va = 0.4 V
-20 -20
II
Input current at
maximum input voltage
Vee = MAX, VI = 7 V 100 100
IIH High-level input current Vee = MAX, VI = 2.7 V 20 20
IlL Low-level input current Vee = MAX, VI = 0.4 V -0.4 -0.4
Short-circuit output
lOS
Vee = MAX -30 -130 -30 -130
current§
,
lee Supply current Vee = MAX, See Note 2 35 60 35 60
UNIT
V
V
V
V
V
p.A
p.A
p.A
p.A
rnA
rnA
rnA
::xJ
»
s
tFor conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
tAli typical values are at Vee = 5 V, TA = 25°e.
§Not more than one output should be shorted at a time and duration of the short circuit should not exceed one second.
NOTE 2: Ice is measured with the write-enable and chip-select inputs grounded, all other inputs at 4.5 V, and all outputs open.
switching charact'eristics over recommended operating ranges of TA and Vee (unless otherwise noted)
SN54LS189A SN74LS189A
PARAMETER TEST CONDITIONS SN54LS219A SN74LS219A UNIT
MIN TYP* MAX MIN TYP* MAX
ta(ad) Access time from address 50 90 50 80 ns
eL = 45 pF,
tarS) Access time from chip select (enable time)
35 70 35 60 ns
See Note 3
tSR Sense recovery time
55 100 55 90 ns
ns
. I from S eL = 5 pF, 30 60 30 50
tpxz Disable time from high or low level I from R/W
See Note 3 40 70 40 60
en *AII typical values are at Vee = 5 V, TA = 25°.
NOTE 3: Load circuits and voltage waveforms are shown in Section 1.
5-22 TEXAS -I.!I
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS. TEXAS 75265