TIL306 Datasheet, PDF (4/9 Pages) Texas Instruments – NUMERIC DISPLAYS WITH LOGIC

TIL306, TIL307
NUMERIC DISPLAYS WITH LOGIC
SLBS001 – D1034, JUNE 1982 – REVISED SEPTEMBER 1992
PIN
NAME
BLANKING Input (BI)
CLEAR Input (CLR)
CLOCK Input (CLK)
DECIMAL POINT
Input (DP)
LATCH Outputs (QA,
QB, QC, QD)
LATCH STROBE
Input (LS)
MAX-COUNT Output
PARALLEL Count
Enable Input (PCEI)
RIPPLE-BLANKING
Input (RBI)
RIPPLE-BLANKING
Output (RBO)
SERIAL Count
Enable Input (SCEI)
NO.
14
12
15
13
4, 1, 2, 3
5
7
9
6
11
10
Terminal Functions
DESCRIPTION
When high, will blank (turn off) the entire display and force RBO low. Must be low for normal display. May
be pulsed to implement intensity control of the display.
When low, resets and holds counter at 0. Must be high for normal counting.
Each positive-going transition will increment the counter provided that the circuit is in the normal counting
mode (serial and parallel count enable inputs low, clear input high).
Must be high to display decimal point. The decimal point is not displayed when this input is low or when the
display is blanked.
The BCD data that drives the decoder can be stored in the 4-bit latch and is available at these outputs for
driving other logic and/or processors. The binary weights of the outputs are: QA = 1, QB = 2, QC = 4,
QD = 8.
When low, data in latches follow the data in the counter. When high, the data in the latches are held constant,
and the counter may be operated independently.
Will go low when the counter is at 9 and serial count enable input is low. Will return high when the counter
changes to 0 and will remain high during counts 1 through 8. Will remain high (inhibited) as long as serial
count enable input is high.
Must be low for normal counting mode. When high, counter will be inhibited. Logic level must not be changed
when the clock is low.
When the data in the latches is BCD 0, a low input will blank the entire display and force the RBO low. This
input has no effect if the data in the latches is other than 0.
Supplies ripple-blanking information for the ripple-blanking input of the next decade. Provides a low if BI is
high, or if RBI is low and the data in the latches is BCD 0; otherwise, this output is high. This pin has a resistive
pullup circuit suitable for performing a wire-AND function with any open-collector output. Whenever this pin
is low, the entire display will be blanked; therefore, this pin may be used as an active-low blanking input.
Must be low for normal counting mode, also must be low to enable maximum count output to go low. When
high, counter will be inhibited and maximum count output will be driven high. Logic level must not be changed
when the clock is low.
absolute maximum ratings over operating case temperature range (unless otherwise noted)
Supply voltage, V_CC (see Note 1): Continuous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Nonrepetitive peak, t_w ≤ 100 ms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
Input voltage (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Operating case temperature range, T_C (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 85°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 25°C to 85°C
NOTES: 1. Voltage values are with respect to network ground terminal.
2. Case temperature is the surface temperature of the plastic measured directly over the integrated circuit. Forced-air cooling may be
required to maintain this temperature.
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