bi-cmos 8-bit serial-input latched driver mitsubishi des cri pt i o n the M54972 is a semiconduct o r integrated circuit consisting o f 8 stages of cmos shift registers and latches with serial inputs a n d serial o r parallel outputs. i t i s based o n bi-cmos process technology, and has 8 bipolar drivers at the parallel outputs. f e at ures l serial input and serial or parallel output l serial output enables cascade connection l built-in latch for each stage l enable input provides output control l low supply current (standby current i cc 10 m a) l serial i/o level is compatible with typical cmos devices l driver fea tures: high withstand voltage (bv ceo 3 30v) capable of large drive currents (i o(max) =300ma) low output saturation voltage v ol < 0.6v at l o =300ma l wide operating temperature range t a =-20 ?+75 c app l i cat i o n dot drivers for thermal print heads. serial/parallel conversion. drivers for relays and solenoids. f unct i o n the M54972 consists of 8 stages of d-type flip flops connected to 8 latches. data is input to serial input s-in, and clock pulses are input t o clock input t. when the clock changes from low to high, the input data enters the first shift r e gister and data already in the shift registers is shifted sequentially. the serial output s-out is used to connect multiple M54972 t o expand the number of parallel outputs. s-out is connected to s-in of the next stage. for parallel output. when the clock pulse changes from low t o high, latch input (latch) is high and output enable input (en) i s low the serial input data at s-in appears at output o1 and the other data already present is shifted sequentially to outputs o2 through o8. the parallel outputs are inverted. when the latch input is held low, the latch retains the stored data. when the en input is high, outputs o1 through o8 all turn off. as the internal logic is unstable when the power is turned on, the en input should be kept high (setting outputs o1 through o8 off) until input data is set and the internal logic is initialized. l-gnd is the gnd of cmos logic circuit and p-gnd is the gnd of output driver circuits o 1 through o 8 which employ bipolar transistors capable of large drive currents. b l oc k d ia gr a m pi n c o n f i g urat i o n ( t o p v i e w) outline 16 13 14 15 1 4 3 2 12 5 11 6 10 7 9 8 ? ? ? ? ? ? ? ? ? ? ? ? ? t s-in l-gnd v cc s-out latch en p-gnd o1 o2 o3 o4 o5 o6 o7 o8 clock serial input logic gnd power supply serial output latch input enable input driver gnd parallel outputs 16p4(p) 16p2n-a(fp) m5 4972p /f p q l d q t d o1 parallel outputs q l d q t d o2 q l d q t d o3 q l d q t d o4 q l d q t d o5 q l d q t d o6 q l d q t d o7 q l d q t d o8 power supply en enable input latch latch input s-in serial input t clock serial output s-out driver gnd p-gnd l-gnd logic gnd v cc 16 15 14 13 12 11 10 9 4 7 6 2 1 3 5 8 M54972p/fp
bi-cmos 8-bit serial-input latched driver m 549 72 p/f p mitsubishi t i m i ng chart i nput / o ut p ut ci rc ui t di ag ram 1 3 inputs with pullup resistors (en, latch) inputs with pulldown resistors (t, s-in) parallel outputs (o1 ? o8) serial output (s-out) s-in * the shaded area shows the unstable state. serial input t clock latch latch input en enable input s-out serial output o1 o2 o3 o4 o5 o6 o7 o8 parallel outputs r in v cc l-gnd r in v cc l-gnd v cc l-gnd p-gnd v cc l -gnd 2 4
bi-cmos 8-bit serial-input latched driver m 549 72 p/f p mitsubishi symbol ratings unit parameter conditions abs o l ut e m axi m um rat i ng s (ta=-20 to 75 c, unless otherwise noted) v cc v i v o i o p d t opr t stg supply voltage input voltage output voltage output current power dissipation operating temperature storage temperature s-out o1 ? o8 : off t a =25 c -0.5 ? +8 -0.5 ? v cc +0.5 -0.5 ? v cc +0.5 -0.5 ? +30 300 1.25 -20 ? 75 -55 ? 125 v v v ma w c c limits min. typ. max. symbol conditions unit parameter rec o m m e nde d o perat i n g c o ndi t i o n v cc v o i o supply voltage a pplied output voltage output current (per circuit) o1 ? o8 : off o1 ? o8 : on, duty cycle < 35% 45 6 30 300 v v ma limits min. typ. max. symbol test conditions unit parameter el ect r i cal charact eri s t i cs (ta=25 c, v cc =5v, unless otherwise noted) v ih v il i ih i il v oh v ol i oh i ol v ol1 i olk i cc 1 i cc 2 high-level input voltage low-level input voltage high-level input current low-level input current input resistance high-level output voltage low-level output voltage high-level output current low-level output current supply current output leak current t a =-20 ?75 c, v cc =4 ? 6v v ih =5v v il =0v v oh =4.5v i ol =200ma v o =30v (o1 ? o8: off) input: open, all driver outputs: off 0.7v cc 0 50 4.9 -100 400 v cc 0.3v cc 100 -100 0.1 0.5 v v m a m a k w v v m a m a limits min. typ. max. symbol test conditions unit parameter t i m i ng req u i r e m e n t s (ta=-20 to 75 c, unless otherwise noted) f (t) t w(t) t w(l) t su t h t d(t-l) t r(t) t f (t) clock frequency clock pulse width latch pulse width data setup time data hold time clock-latch time clock pulse rise time clock pulse fall time input duty cycle: 40 ? 60% 200 200 100 100 400 2 500 500 mhz ns ns ns ns ns ns ns o1 ? o8 : on M54972p M54972fp 0.8 r in v ol3 v ol2 low-level output voltage s-out s-out s-out s-out o1 ? o8 |i o | 1 m a i ol =300ma v ol =0.4v one driver output is on. 0.6 50 10 7. 5 v v m a m a ma M54972p M54972fp o1 ? o8 : on, duty cycle < 70% o1 ? o8 : on, duty cycle < 15% 20 0 20 0 en, latch t, s-in o1 ? o8
bi-cmos 8-bit serial-input latched driver m 549 72 p/f p mitsubishi t i m i ng chart limits min. typ. max. symbol test conditions unit parameter sw i t chi ng chara ct e r i s t i cs (ta=25 c, v cc =5v, unless otherwise noted) t plh t phl t plh t phl t plh t phl low-to-high-level output propagation time from input t to output s-out high-to-low-level output propagation time from input t to output s-out low-to-high-level output propagation time from input t to output o n high-to-low-level output propagation time from input t to output o n low-to-high-level output propagation time from input en to output o n high-to-low-level output propagation time from input en to output o n v ih =5v v il =0v r l (s-out )= r l (o n )=100 w (n=1?) c l =15pf 0.3 0.3 10 5 10 5 m s m s m s m s m s m s t est ci rcui t t i m i ng chart t su 2.5v t h t w(t) t r(t) s-in t latch 2.5v 2.5v 2.5v 90% 10 % t d(t-l) t w(l) 2.5v 2.5v t f(t) 90% 10 % serial data input clock latch input 2.5v t plh 2.5v s-out t v cc r l c l input pg 50 w m5 4972p /f p output the in put waveform: t r 20ns, t f 20ns the capacitance c l includes the stray wiring capacitance and probe input capacitance. 2.5v t phl 2.5v 2.5v 2.5v 2.5v 2.5v 2.5v t plh 2.5v t plh t phl en on serial output clock enable input output t phl
bi-cmos 8-bit serial-input latched driver m 549 72 p/f p mitsubishi t ypi cal charact eri s t i cs (v cc =5v, t a =25 c, unless otherwise noted) 3 1 7 8 6 duty cycle vs. allowable output current (M54972fp) duty cycle vs. allowable output current (M54972p) duty cycle vs. allowable output current (M54972fp) thermal derating (absolute maximum rating) 0 0 0.5 1.0 1.5 25 50 75 100 v cc vs. i cc 0 35 8 20 100 0 20 40 60 80 100 duty cycle (%) 0 300 0 20 40 60 80 100 duty cycle (%) 0 300 400 duty cycle vs. allowable output current (M54972p) 200 100 46 7 40 60 80 200 100 M54972p 8 outputs on 7 outputs on 6 outputs on 5 outputs on 4 outputs on 2 outputs on 1 output on 0 20 40 60 80 100 duty cycle (%) 0 300 0 20 40 60 80 100 duty cycle (%) 0 300 400 200 100 200 100 t a = 75 c, v cc = 6v repetitive frequency >10h z each figure in a circle shows the number of output circuits which operate simultaneously. current value : output current per circuit M54972fp t a = 75 c, v cc = 6v repetitive frequency >10h z each figure in a circle shows the number of output circuits which operate simultaneously. current value : output current per circuit t a = 25 c, v cc = 6v repetitive frequency >10h z each figure in a circle shows the number of output circuits which operate simultaneously. current value : output current per circuit t a = 25 c, v cc = 6v repetitive frequency >10h z each figure in a circle shows the number of output circuits which operate simultaneously. current value : output current per circuit supply current i cc (ma) power dissipation p d (w) output current io (ma) output current io (ma) output current io (ma) output current io (ma) ambient temperature t a ( c) cc (v) 1 7 8 4 5 6 3 1 8 4 6 2 1 8 3 6 5 4 3 outputs on supplyvoltage v
bi-cmos 8-bit serial-input latched driver m 549 72 p/f p mitsubishi t a = -20 c driver output v ol vs. i ol (common) 0 0 0.5 1.0 40 0 60 0 20 0 t a = 25 c t a = 75 c low-level output current i ol (ma) low-level output voltage v ol (v)
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