TheTTL - Al Kossow's Bitsavers

TBP28L22
2048 BITS (256 WORDS BY 8 BITS)
LOW·POWER PROGRAMMABLE READ·ONLY MEMORIES WITH 3·STATE OUTPUTS
logic symbol
AO
Al
A2
A3
A4
AS
AS
A7
02
01
(1)
(2)
(3)
(4)
(5)
(17)
(18)
(19)
(lS) f'....
(15) ..........
TBP28L22
PROM 25S X 8
0
A\l
A\l
A\l
0
~
> A '255 A\l
EN
A\l
A\l
A\l
A\l
(S)
(7)
(8)
(9)
(11)
(12)
(13)
(14)
00
Q1
02
03
04
05
OS
07
pin assignment
TBP28L22
J OR N PACKAGE
(TOP VIEW)
AO
A1
A7
A2
A6
A3
A5
A4 (32
00 (31
01 07
02 06
03 05
GND 04
Vee
recommended operating conditions
Vee
VIH
VIL
10H
10L
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
-2 -6.5 mA
16 16 mA
-55 125 0 70 °e
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS t
MJ
J OR N
MIN TYP* MAX MIN TYP* MAX
UNIT
VIK Vee = MIN. II = -18 mA -1.2 -1.2 V
VOH Vee = MIN. 10H = MAX 2.4 3.1 2.4 3.1 V
VOL Vee = MIN. 10L = 16mA 0.5 0.5 V
10ZH Vee = MAX. Vo = 2.4 V 50 50 p.A
10Zl Vee = MAX. Vo = 0.5 V -50 -50 p.A
II Vee = MAX. VI = 5.5 V 1 1 mA
IIH Vee = MAX. VI = 2.7 V 25 25 p.A
IlL Vee = MAX. VI = 0.5 V -0.25 -0.25 mA
lOS!! Vee = MAX -25 -100 -30 -100 mA
lee Vee = MAX 75 100 75 100 mA
tn
:2:
o
a:
c..
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
taA) Access time from address eL = 30 pF 45 75 45 70
ta(S) Access time from chip select (enable time) See Note 3 20 40 20 35
tdis Disable time
eL = 5 pF
See Note 3
15 35 15 30
UNIT
ns
ns
ns
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.
TEXAS •
INSTRUMENTS
POST OFFICE BOX 225012 • DALLAS. TEXAS 75265
4-27