RO-3-2513 Character Generator
From a 5 page GENERAL INSTRUMENTS datasheet:
2560 bit = 512 x 5 bit = 64 x 8 x 5 bit static ROM.
A1 to A3 = ROW ADDRESS
A4 to A9 = CHARACTER ADDRESS
(A4 = ASCII bit 1, A9 = ASCII bit 6)
Pins :
1 to 3 : not connected
4 : Out1
5 : Out2
6 : Out3
7 : Out4
8 : Out5
9 : n.c.
10: Gnd
11: Output Inhibit
12: n.c.
13: n.c.
14: A1
to
22: A9
23: n.c.
24: +5V
RO-3-2513/CGR-001 : programmed with ASCII uppercase
and 0 to 9 (totally from @ to ? )
Example: For S , ASCII = 010011:
ROW Address Outputs
A3 A2 A1 O5 O4 O3 O2 O1
0 0 0 0 0 0 0 0
0 0 1 0 1 1 1 0
0 1 0 1 0 0 0 1
0 1 1 1 0 0 0 0
1 0 0 0 1 1 1 0
1 0 1 0 0 0 0 1
1 1 0 1 0 0 0 1
1 1 1 0 1 1 1 0
Maximum Ratings :
Vcc = -0.3 to + 8 V
Top = 0 to 70 grdC.
Tstg = -65 to 150 grdC.
Characteristics at 5V, one TTL Load, CL total=50 pF:
Power Supply : typ 25 mA, max 33 mA
Output HIGH Voltage at I=0.1 mA : min 2.2 V 2)
Output LOW Voltage at I=1.6mA : max 0.45 V
Cycle Time : min 400 ns
Access Time : min 75 ns, typ 250 ns, max 450 ns
Inhibit Response Time : typ 150 ns, max 200 ns 1)
Capacitances:
Inputs : typ 5 pF, max 8 pF
Outputs : typ 8 pF, max 10 pF
1) Inhibit LOW to Outputs valid = Inhibit HIGH to Outputs
high impedance.
2) From a diagram: for Output high voltage = 1 V
a 9 mA source current is typical.
For Low voltage = 2V the sink current =17 mA.
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Without guaranty! Mistakes are possible. Please ask via email if you find a strange value!
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Alle Angaben ohne Garantie. Fehler beim Abschreiben sind möglich. Wenn Sie seltsame Werte entdecken, scheuen Sie sich nicht, per email nachzufragen!