TheTTL - Al Kossow's Bitsavers

TBP28L42
·4096 BITS (512 WORDS BY 8 BITS)
LOW·POWER PROGRAMMABLE READ·ONLY MEMORIES WITH 3·STATE OUTPUTS
logic symbol
(1)
AO
(2)
A1
(3)
A2
(4)
A3
(5)
A4
(16)
AS
(17)
A6
(18)
A7
(19)
A8
(15) f'....
G
TBP28l42
PROM 512 X 8
0 (6)
A\l
(7)
A\l
(8)
A\l
(9)
0 A\}
>A511
(11)
A\l
(12)
A\l
(13)
A\l
(14)
A\l
8
EN
00
01
02
03
04
05
06
07
pin assignment
TBP28L42
J OR N PACKAGE
(TOP VIEW)
AO
A1
A8
A2
A7
A3
A6
A4
A5
00 IT
01 07
02 06
03 05
GND 04
Vee
recommended operating conditions
Vee
VIH
V,L
IOH
IOL
TA
PARAMETER
Supply voltage
High-level input voltage
low-level input voltage
High-level output current
low-level output current
Operating free-air temperature range
MJ
J OR N
MIN NOM MAX MIN NOM MAX
UNIT
4.5 5 5.5 4.75 5 5.25 V
2 2 V
0.8 0.8 V
-1 -1.6 rnA
8 8 rnA
-55 125 0 70 °e
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) •
PARAMETER
TEST CONDITIONSt
MJ
J OR N
MIN TYP* MAX MIN TYP* MAX
UNIT
V,K Vee = MIN, I, = -18 rnA -1.2 -1.2 V
VOH Vee = MIN, IOH = MAX 2.4 3.1 2.4 3.1 V
VOL Vee = MIN, IOl = 8 rnA 0.5 0.5 V
IOZH Vee = MAX, Vo = 2.4 V 50 50 p.A
IOZl Vee = MAX, Vo = 0.5 V -50 -50 p.A
Vee = MAX, VI = 5.5 V 1 1 rnA
"
IIH Vee = MAX, VI = 2.7V 25 25 p.A
',L Vee = MAX, VI = 0.5 V -0.25 -0.25 rnA
IOS§ Vee = MAX -10 -100 -10 -100 rnA
lee Vee = MAX 50 85 50 85 rnA
en
~
o
a:
0.
switching characteristics over recommended ranges of TA and Vee (unless otherwise ·noted)
PARAMETER
TEST MJ J OR N
CONDITIONS MIN TYP* MAX MIN TYP* MAX
talA) Access time from address eL = 30 pF 55 110 55 95
ta(S) Access time from chip select (enable time) See Note 3 25 60 25 60
tdis Disable time
eL = 5 pF
See Note 3
25 50 25 40
tFor conditions shown as MIN or MAX, use 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 3: Load circuits and voltage waveforms are shown in Section 1.
UNIT
ns
ns
ns
TEXAS ..
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS. TEXAS 75265
4-29