TheTTL - Al Kossow's Bitsavers

TBP38R165, TBP38R16X
16,384-BIT (2048 WORDS BY 8 BITS) REGISTERED
PROGRAMMABLE READ-ONLY MEMORIES
recommended operating conditions for programming (see Figure 1)
Supply voltage during verification
Input voltage
Enable voltage during verification
Enable inactive voltage during programming
VCC program pulse amplitude
VCC program pulse duration
Enable setup time t before VCC(pr)
Enable hold time~ after VCC(pr)
Rise time of VCC(pr) §
Fall time of VCC(pr)'
LIst attempt
I 2nd attempt
I 3rd attempt
Delay time between successive VCC(pr) pulses
Delay time between successive VCC(pr) pulses
Cooling time between words
Free-air temperature
VCC
VIH
VIL
Gl
G2. G3
Gl
G2. G3
VCC(pr)
twl
tw2
tw3
tsu(en)
th(en)
tr(VCC)
tf(VCC)
tdl
td2
tcool
TA
MIN NOM MAX UNIT
4.25 5 5.75 V
3 4 5
0 0.2 0.5
0 0.2 0.4
3 4 5
4.25 5 5.75
0 0.2 0.4
V
V
V
11 11.5 12 V
10 11 12
20 22 25 V
20 22 25
0.1 0.5 1 /lS
0.1 0.5 1 /lS
0.3 0.4 0.5 /lS
0.05 0.1 0.2 p.s
10 20 30 /lS
10 20 30 /lS
100 150 200 /lS
20 25 30 °c
t Measured from 1.5 V on enable pin to 5.5 V on V CC(pr)
i Measured from 5.5 V on VCC(pr) to 1.5 V on enable pin
§ Measured from 5 V to 12 V
, Measured from 12 V to 5 V
step-by-step programming instructions (see Figure 1)
1. Address the word to be programmed, apply 5 volts to VCC, apply VIL(pr) to th~able input G and
VIH to the INIT input. During initialization word programming apply VIL to the INIT input.
2. Verify the selected bit location that requires programming. Note: The only bit positions that require
programming are outputs to be a low logic level.
3. For bit locations that do not require programming, go to step 2 for the next bit, or to step 1 for the
next word.
4. Deselect PRCM by applying VIH(pr) to G.
5. Connect a 4-mA current source (clamped to Vcc) to the output that is to be programmed.
6. Increase VCC to VCC(pr) for a pulse duration equal to twx (where X is determined by the number of
programming attempts, i.e., 1, 2, 3). Minimum current capability for the VCC power supply should be
500 mAo
7. Verify that the output has been programmed to a low logic level. If the output has been programmed
correctly, go to the next bit. If not, repeat step 2 through step 7 and increment X (where X is equal
to 1 on the first programming attempt). If the output has not been programmed by the third attempt,
stop programming and go to a new device. Note: Data must be clocked into the output register to verify
programming.
8. Verify programming of every word after all words have been programmed using VCC values of 4.5 volts
and 5.5 volts.
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TEXAS -II}
INSTRUMENTS
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