UPB429 Datasheet PDF - NEC

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UPB429
NEC

Part Number UPB429
Description 2K x 8-BIT BIPOLA TTL PROM
Page 5 Pages


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NEe Microcomputers, Inc.
NEe
p.PB409
J'!PB429
",PB409-1
}LPB429-1
p.PB409-2
ILPB429-2
2048 WORD BY 8 BIT BIPOLAR TTL
PROGRAMMABLE READ ONLY MEMORY
DESC RIPT ION
The JlPB409 and JlPB429 are high-speed, electrically programmable, fully-decoded
16384 bit TTL read only memories. On-chip address decoding, three chip enable
inputs and open-collector/three-state outputs allow easy expansion of memory
capacity. The JlPB409 and JlPB429 are fabricated with logic level zero (low); logic
level one (high) can be electrically programmed into the selected bit locations. The .
same address inputs are used for both programming and reading.
FEATURES
2048 WORDS x 8 BITS Organization (Fully Decoded)
• TT L Interface
• Fast Read Access Time
:50 ns MAX
• Medium Power Consumption :500 mW TyP
• Three Chip Enable Inputs for Memory Expansion
• Open-Collector Outputs (JlPB409)
• Three-State Outputs (JlPB429)
• Ceramic 24-Lead Dual In-Line Package (JlPB409D, JlPB429D)
• Plastic 24-Lead Dual In-Line Package (JlPB409C, JlPB429C)
• Fast Programming Time
:200.Jls/bit TYP
• Replaceable with
:82S190/191
HM76160/76161, 3636
and Equivalent Type Devices
PIN CONFIGURATION
A7
A6 2
AS 3
A4 4
A3 5
/.IPS
A2 6 409/
Al 429
Ao 8
01 9
°2
03
GND
12
24 VCC
23 AS
22 Ag
21 A10
20 CEI
19 CE2
18 CE3
17 Os
16 '°7
15 06
14 Os
13 °4
PIN NAMES
AO-Al0
CE1-CE3
01-0 8
Address Inputs
Chip Enable Inputs
Data Outputs
",,1
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#PB409/429
Supply Voltage
Input Voltage .
Output Vol tage
Output Current
· .. -0.5 to +7.0V
.-0.5to+5.5V
. . -0.5 to +5.5V
......... 50mA
Operating Temperature
Storage Temperature
Ceramic Package ... .
· .-25°C to +75°C
.-65°C to +150°C
Plastic Package .... .
· -55°C to +125°C
COMMENT: Stress above those listed under "Absolute Maximum Ratings" may cause permanent
damage to the device. This is a stress rating only and functional operation of the device at these or
any other conditions above those indicated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability.
ABSOLUTE
MAXIMUM RATINGS*
Ta = o"e to 75"e, Vee = 4.5 to 5.5V
CHARACTERISTIC
SVMBOL MIN
Input High Voltage
VIH
2.0
Input L.ow Voltage
Input High Current
VIL
IIH
Input Low Current
-IlL
Output Low Voltage
VOL
Output Leakage Current
Output Leakage Current
10FFl
-IOFF2
Jnput Clamp Voltage
-VIC
Power SUPPly Current
ICC
Output High Voltage*
VOH
Output Short Circuit Current * -ISC
2.4
20
*Note: Applicable to ",PB429
TV.
100
MAX
0.85
40
0.25
0.45
40
40
1.3
160
70
UNIT
V
V
~A
mA
V
~A
~A
V
mA
V
mA
TEST CONDITIONS
V =5.SV, Vr.r.=S.SV
VI=0.4V, VCC=S.SV
10=16 mA, VCC=4.5V
VO=5.5V, VCC=5.5V
VO=O.4V, VCC=5.5V
11=-18 mA, VCC=4.5V
All inputs Grounded, VCC=5.5V
10=-2.4 mA, VCC=4.5V
VO=OV
DC CHARACTERISTICS
Ta = 25°C, f = 1 MHz, VCC = 5V, Vm = 2,5V
CHARACTERISTICS
SYMBOL
Input Capacitance
CIN
Output Capacitance
COUT
MIN
MAX
8
10
UNIT
pF
pF
CAPACITANCE
Ta =o'e to 75'e Vee = 4'5 to 5 5V CD®@®
CHARActeRISTIC
SYMBOL
Address Access Time
ChiP Enable Access Time
Chip Enable Disable Time
'AA
tACE
toeE
",PB409·2, ,I.IPB429-2
MIN
MAl<
SO
30
30
j.lPB409-', /oiPB429-'
MIN MAX
60
40
40
j.lPB409, j.lP13429
MIN MAX
70
50
50
UNIT
n.
n.
n.
AC CHARACTERISTICS
Vee
300.0.
---~ 0, (DUT)PO:- - - - -. . .
:.r: CL
30 pF
m;
600.0.
FIGURE 1
NOTES:
CD Output Load: See ~ig. 1.
@ Input Waveform: O.OV fOr low level and-3.0V for high level, less than 10ns for bOth rise and fall times.
® Measurement References: 1.5V for both inputs and outputs.
@) CL in Fig. 1 includes jig and probe stray capacitances.
138



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,uPB409/429
OPE RATION
You can program only when the outputs are disabled by anyone of the chip enable
inputs. This insures that the output will not be damaged when you apply programming
voltages.
Programming
You can permanently program a logic one into a selected bit location by using special
equipment (programmer). First, disable the chip as described above. Second, apply a
train of high-current programming pulses to the desired output. Apply an additional
pulse train after the sensed voltage indicates that the selected bit is in the logic one
state. Then, stop the pulse train.
Reading
To read the memory, enable the chip (i.e., CEl = 0, CE2 = CE3 = 1). The outputs then
correspond to the data programmed into the selected words. When the chip is dis'
abled, all the outputs will be in a high impedance (floating) state.
LOGIC DIAGRAM
16384 BIT
(128 x 128)
MEMORY CELLS
ARRAY
CE'
139



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JJ. PB409/429
It is imperative that this specification be rigorously observed in order to correctly
program the tlPB409 and tlPB429. NEe will not accept responsibility for any device
found to be defective if it was not programmed according to this specification.
PROG RAMM I NG
SPECIF ICATION
CHARACTERISTIC
Ambient Temperature
Programming Pulse
Amplitude
Clamp Voltage
Ramp Rate (Both in Rise and in Fall)
Pulse Width
Duty Cycle
Sense Current
Amplitude
Clamp Voltage
Ramp Rate
Sense Current Interruption before
and after address change
Programming VCC
Maximum Sensed Voltage*
for programmed "1"
Delay from trailing edge of programming
pulse before sensing output voltage
LIMIT
25 + 5
UNIT
I °c
200 ± 5%
28 + 0%- 2%
70 MAX
7.5 ± 5%
70%MIN
mA
V
V/JJ.S
I"S
20 ± 0.5
28 +0%- 2%
70 MAX
10 MIN
5.0 + 5%- 0%
7.0 ± 0.1
mA
V
V/JJ.S
I"S
V
V
0.7 MIN
1"5
NOTES
15V point/150n load
15V point/150n load
*A bit is judged to be programmed when two successive sense readings 10 J.l.S apart with no
intervening programming pulse pass the limit. W~en this condition has been met, four addi-
tional pulses are applied, then the sense current is terminated.
ADDITIONAL PULSE TRAIN
~
__••- 28V CLAMP
- - . - 200 mA PROGRAM PULSE
TYPICAL OUTPUT
VOLTAGE WAVEFORM
----- 100 mA POINT
_ ..... 20 mA SENSING (BEFORE PROGRAMMING)
----- 7.0V REF
- - " . 20 mA SENSING {AFTER PROGRAMMING)
- -...·'GND
OUiPUT VOLTAGE SENSING
COMMERCIALLY AVAILABLE PROGRAMMING EQUIPMENT:
DATA I/O: PROGRAM CARD 909/919-1555
WITH SOCKET ADAPTER 715-1033
140



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