TheTTL - Al Kossow's Bitsavers

SN54S189B, SN54S289B, SN74S189B, SN74S289B
64·BIT HIGH·PERFORMANCE
RANDOM·ACCESS MEMORIES
electrical characteristics over recommended operating free·air temperature range
(unless otherwise noted)
PARAMETER
TEST CONDITIONS t
'S1898
'S289B
MIN TYP~ MAX MIN TYP~
VIH High-level input voltage 2 2
VIL Low-level input voltage 0.8
VIK Input clamp voltage Vee - MIN, II - -18 mA -1.2
VOH High-level output voltage
Vee = MIN, VIH = 2 V, SN54S' 2.4 3.4
VIL = 0.8 V, IOH = MAX SN74S' 2.4 3.2
IOH High-level output current
Vee = MIN, VIH = 2 V, Va = 2.4 V
VIL = 0.8 V
Va = 5.5 V
VOL Low-level output voltage
Vee = MIN, VIH = 2 V,
VIL = 0.8 V, IOL = 16 mA
0.35 0.5 0.35
MAX
UNIT
V
0.8 V
-1.2 V
V
40
p.A
100
0.5 V
:xl
»
10ZH Off-state output current, Vee - MAX,- VIH = 2 V, 50
high-level voltage applied VIL = 0.8 V, VOH = 2.4 V
10ZL
II
Off-state output current, Vee - MAX, VIH - 2 V,
low-level voltage applied VIL = 0.8 V, VOL = 0.4 V
Input current at maximum
input voltage
-50
Vee = MAX, VI = 5.5 V 1
IIH High-level input current Vee = MAX, VI = 2.7 V 25
IlL Low-level input current Vee = MAX, VI = 0.5 V -250
lOS
Short-circuit output
current§
Vee = MAX -30 -100
lee Supply current Vee = MAX, See Note 2 75 110 75 105 mA
NOTE 2: lee is measured with the read/write and chip-select inputs grounded. All other inputs at 4.5 V, and the outputs open.
'5189B switching characteristics over recommended operating ranges of TA and Vee
(unless otherwise noted)
p.A
p.A
1 mA
25 p.A
-250 p.A
PARAMETER
TEST CONDITIONS
SN54S189B
SN74S189B
MIN TYP~ MAX MIN TYP~ MAX
UNIT
ta(ad) Access time from address 25 50 25 35 ns
ta(S)
Access time from chip select
eL = 30 pF,
(enable time) See Note 3
18 25 18 22 ns
tSR Sense recovery time 22 40 22 35 ns
Disable time from high I From S eL = 5 pF, 12 25 12 17
tpxz
ns
or low level I From W See Note 3 12 30 12 25
s: 'S289B switching characteristics over recommended operating ranges of T A and Vee
r.n (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SN54S289B
SN74S289B
MIN TYP~ MAX MIN TYP~ MAX
UNIT
ta(ad) Access time from address 25 50 25 35 ns
Access time from chip-select
ta(S)
eL = 30 pF, 18 25 18 22 ns
(enable time)
RL1 = 300 n,
tSR Sense recovery time
22 40 22
RL2 = 600 n,
35. ns
_ Propagation delay time, From S See Note 3
12 25 - 12 17
tpLH low-to-high-Ievel
ns
output (disable time) I FromW
12 30 12 25
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°.
§Duration of the short circuit should not exceed one second.
NOTE 3: Load circuits and voltage waveforms are shown in Section 1.
mA
5-28
TEXAS ."
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS. TEXAS 75265