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74HC4511D-74HCT4511D
BCD to 7-segment latch/decoder/driver
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver 74HC/HCT4511
FEATURES Latch storage of BCD inputs Blanking input Lamp test input Driving common cathode LED displays Guaranteed 10 mA drive capability per output Output capability: non-standard ICC category: MSI
GENERAL DESCRIPTIONThe 74HC/HCT4511 are high-speed Si-gate CMOS
devices and are pin compatible with “4511” of the “4000B”
series. They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT4511 are BCD to 7-segment
latch/decoder/drivers with four address inputs (D1 to D4),
an active LOW latch enable input (LE), an active LOW
ripple blanking input (BI), an active LOW lamp test input
(LT), and seven active HIGH segment outputs (Qa to Qg).
When LE is LOW, the state of the segment outputs (Qa to
Qg) is determined by the data on D1 to D4.
When LE goes HIGH, the last data present on D1 to D4 are
stored in the latches and the segment outputs remain
stable.
When LT is LOW, all the segment outputs are HIGH
independent of all other input conditions. With LT HIGH, a
LOW on BI forces all segment outputs LOW. The inputsLT
and BI do not affect the latch circuit.
APPLICATIONS Driving LED displays Driving incandescent displays Driving fluorescent displays Driving LCD displays Driving gas discharge displays
QUICK REFERENCE DATAGND= 0 V; Tamb =25 °C; tr =tf= 6 ns
Notes CPD is used to determine the dynamic power dissipation (PD in μW): =CPD× VCC2×fi +∑ (CL× VCC2× fo) where:= input frequency in MHz= output frequency in MHz (CL× VCC2×fo)= sum of outputs= output load capacitance in pF
VCC= supply voltage in V For HC the condition is VI= GND to VCC
For HCT the condition is VI= GND to VCC− 1.5 V
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver 74HC/HCT4511
ORDERING INFORMATIONSee “74HC/HCT/HCU/HCMOS Logic Package Information”.
PIN DESCRIPTION
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver 74HC/HCT4511
FUNCTION TABLE
Note Depends upon the BCD-code applied during the LOW-to-HIGH transition of LE.= HIGH voltage level= LOW voltage level= don’t care
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver 74HC/HCT4511
Philips Semiconductors Product specification
BCD to 7-segment latch/decoder/driver 74HC/HCT4511
DC CHARACTERISTICS FOR 74HCFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard, excepting VOH which is given below
ICC category: MSI
Non-standard DC characteristics for 74HCVoltages are referenced to GND (ground= 0 V)
