Features: * Low Logic Circuit Power Dissipation
* HighCurrent Sourcing Outputs (Up to 25 mA)
* Latch Storage of Code
* Blanking Input
* Lamp Test Provision
* Readout Blanking on all Illegal Input Combinations
* Lamp Intensity Modulation Capability
* Time Share (Multiplexing) Facility
* Supply Voltage Range = 3.0 V ~ 18 V
* Capable of Driving Two Low-power TTL Loads, One Low-power Schottky TTL Load or Two HTL Loads Over the Rated Temperature Range
* Chip Complexity: 216 FETs or 54 Equivalent Gates
* Triple Diode Protection on all Inputs
Pinout
Specifications
| PARAMETER |
SYMBOL |
RATINGS |
UNIT |
DC Supply Voltage Range
Input Voltage Range, All Inputs |
VDD
Vin |
-0.5 ~ +18.0
-0.5 ~ VDD+0.5 |
V
V |
DC Current Drain per Input Pin
Power Dissipation, per Package (Note 2) |
I
PD |
10
500 |
mA
mW |
Maximum Output Drive Current
(Source) per Output
Maximum Continuous Output
Power (Source) per Output (Note 3) |
IOHmax
POHmax |
25
50 |
mA
mA |
Operating Temperature Range
Storage Temperature Range |
Ta
Tstg |
-55 ~ +125
-65 ~ +150 |
|
Note 1: Maximum Ratings are those values beyond which damage to the device may occur.
Note 2: Temperature Derating:
Plastic "P and D/DW" Packages: - 7.0 mW/ From 65 ~ 125
Note 3: POHmax = IOH (VDD VOH)
DescriptionThe UTCMC14511 BCDtoseven segment latch/decoder/driver is constructed with complementary MOS (CMOS) enhancement mode devices and NPN bipolar output drivers in a single monolithic structure. The circuit provides the functions of a 4-bit storage latch, an 8421 BCD-to-seven segment decoder, and an output drive capability. Lamp test (LT), blanking (BI), and latch enable (LE) inputs of the UTCMC14511 are used to test the display, to turn-off or pulse modulate the brightness of the display, and to store a BCD code, respectively. It can be used with seven-segment light-emitting diodes (LED), incandescent, fluorescent, gas discharge, or liquid crystal readouts either directly or indirectly.
Applications include instrument (e.g., counter, DVM, etc.) display driver, computer/calculator display driver, cockpit display driver, and various clock, watch, and timer uses.
UTCMC14511 Data Sheet
