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_______________general description the max777l/max778l/max779l are pulse-skipping dc-dc converters that step up from low-voltage inputs (1v guaran- teed). they require only three external components?n induc- tor (typically 22?) and two capacitors. the max777l delivers a 5v output, the max778l generates pin-selectable voltages of 3.0v or 3.3v, and the max779l output can be adjusted from 2.5v to 6v through an external resistive divider. the devices include an active rectifier tm that eliminates the need for an external catch diode, and permits regulation even when the input is greater than the output. also, unlike those in other step-up converters, the max777l/max778l/max779l? active rectifier tm turns off in the shutdown mode, disconnect- ing the output from the source. this eliminates the current drain associated with conventional step-up converters when off or in shutdown. high-frequency operation (up to 150khz) allows the use of small, surface-mount inductors with values of 10? or less. supply current is 190? under no load and only 20? in stand- by mode; supply voltage can range from 1v to 4.5v (1 to 3 cells). with a 2v input, the devices typically deliver 200ma at 5v, or 300ma at 3v. for fully specified devices designed for step-up/step-down applications (where the input can be above or below the out- put), refer to the max877l/max878l/max879l data sheet. ________________________applications single battery-cell (1v), step-up voltage conversion efficient, high-power step-up regulation from low input voltages pagers portable instruments & hand-held terminals notebook and palmtop computers ____________________________features ? 1v to 4.5v input guarantees start-up under load ? up to 210ma output ? load fully disconnected in shutdown ? 82% efficiency ? output in regulation with input voltage above output voltage ? internal 1a power switch and active rectifier ? adjustable current limit allows low-cost inductors ? 190? no load supply current ? 20? shutdown supply current ? 3v/3.3v (max778l), 5v (max777l), and adjustable (max779l) output voltage ______________ordering information ordering information continued at end of data sheet. * dice are specified at t a = +25?, dc parameters only. **contact factory for availability and processing to mil-std-883. max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters ________________________________________________________________ maxim integrated products 1 1 2 3 4 dip/so top view max777l max778l max779l 8 7 6 5 n.c. (max777l) * shdn out lx ilim in agnd pgnd * sel for max778l, fb for max779l. __________________pin configuration input 1v to 4.5v in ilim shdn 100? output 5v agnd max777l lx out pgnd 22? on/off 22 m f 1 2 7 4 3 6 5 __________typical operating circuit 19-0186; rev 2; 7/96 for free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 part temp. range pin-package max777l cpa 0? to +70? 8 plastic dip max777lcsa 0? to +70? 8 so max777lc/d 0? to +70? dice* max777lmja -55? to +125? 8 cerdip** max777lesa -40? to +85? 8 so max777lepa -40? to +85? 8 plastic dip active rectifier is a trademark of maxim integrated products. evaluation kit manual follows data sheet
max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v in = +2.5v, i load = 0ma, l = 22?, c out = 100?, shdn and ilim connected to in, agnd connected to pgnd, t a = t min to t max , typical values are at t a = +25?, unless otherwise noted.) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. supply voltage (in to pgnd).......................................0v to 4.5v output short-circuit duration to pgnd, agnd (note 1)....30sec voltage applied to: lx (switch off) .......................................................-0.3v to 4.5v (switch on) ....................................30sec short to in or out out, shdn ...........................................................-0.3v to +7v fb ...........................................................-0.3v to (out + 0.3v) agnd to pgnd ........................................................-0.3v, +0.3v reverse battery current....................................................900ma continuous power dissipation (t a = +70?) plastic dip (derate 9.09mw/? above +70?) .............727mw so (derate 5.88mw/? above +70?) ..........................471mw cerdip (derate 8.00mw/? above +70?) ..................640mw operating temperature ranges: max77_lc_a .......................................................0? to +70? max77_le_a ....................................................-40? to +85? max77_lmja .................................................-55? to +125? storage temperature range .............................-65? to +150? lead temperature (soldering, 10sec) .............................+300? note 1: the output may be shorted to ground if the package power dissipation is not exceeded. parameter output voltage max777l/max779l (set to 5v) (note 6) min typ max (note 4) i load = 100ma units shdn input current max77_lm max77_lc, max77_le 12 40 output voltage range (max779l) 2.5 6.0 ? v in < shdn < 5v v 20 35 15 100 4.80 5.00 5.20 na 0v < shdn < v in v max777lc/ max779lc maximum operating voltage minimum start-up voltage 1 v 4.5 v efficiency 82 % no-load supply current 190 310 ? shutdown supply current 20 30 ? conditions i load = 0ma (switch off) shdn = 0v max777le/ max779le max777lm/ max779lm (notes 2, 3) i load < 10ma, t a = +25? (note 2) output voltage max778l (note 6) max778le 3.17 3.30 3.43 v max778lc sel = 0v max778lm max778le 2.88 3.00 3.12 max778lc sel = open max778lm i load 30ma, 1.1v v in 4.5v or i load 140ma, 1.8v v in 4.5v i load 30ma, 1.2v v in 4.5v or i load 130ma, 1.8v v in 4.5v i load 25ma, 1.25v v in 4.5v or i load 120ma, 1.8v v in 4.5v i load 50ma, 1.1v v in 3.3v or i load 210ma, 1.8v v in 3.3v i load 50ma, 1.2v v in 3.3v or i load 200ma, 1.8v v in 3.3v i load 50ma, 1.25v v in 3.3v or i load 180ma, 1.8v v in 3.3v i load 50ma, 1.1v v in 3v or i load 210ma, 1.8v v in 3v i load 50ma, 1.2v v in 3v or i load 200ma, 1.8v v in 3v i load 40ma, 1.25v v in 3v or i load 180ma, 1.8v v in 3v
max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters _______________________________________________________________________________________ 3 note 2: output in regulation, v out = v out (nominal) ?%. note 3: at high v in to v out differentials, the maximum load current is limited by the maximum allowable power dissipation in the package (see absolute maximum ratings ). note 4: minimum value is production tested. maximum value is guaranteed by design and is not production tested. note 5: v out is set to a target value of +5v by 0.1% external feedback resistors. v out is measured to be 5v ?.5% to guarantee the error comparator trip point. note 6: start-up guaranteed under these load conditions. parameter maximum switch on time min typ max 12.6 units switch saturation voltage ? 0.275 1.2 -0.3 ? %/? current limit 1.0 a minimum switch off time 0.33 0.50 v 2.2 4.0 0.21 v 5.9 0.31 rectifier forward voltage drop shdn threshold 0.50 error-comparator trip point 197.5 202.5 207.5 v in /2 + 0.25 mv v fb pin bias current 1.20 1.6 10 40 na switch off leakage current shdn enable delay 0.1 ? 150 ? rectifier off leakage current 0.1 ? conditions v in = 1v i sw = 400ma max777l, max779l i sw = 600ma i sw = 1000ma max778 i sw = 400ma v in = 2.5v v in = 1.8v i sw = 600ma i sw = 1000ma max779l, over operating input voltage (note 5) v in = 1v to 4.5v v in = 2.5v max779l, v fb = 0.3v electrical characteristics (continued) (v in = +2.5v, i load = 0ma, l = 22?, c out = 100?, shdn and ilim connected to in, agnd connected to pgnd, t a = t min to t max , typical values are at t a = +25?, unless otherwise noted.) current-limit temperature coefficient
max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters 4 _______________________________________________________________________________________ __________________________________________typical operating characteristics (typical operating circuit, t a = +25?, unless otherwise noted). 50 12 5 shutdown supply current vs. input voltage and temperature 60 max777-7 input voltage (v) shutdown supply current ( m a) 70 80 34 40 10 20 30 0 7 6 t a = +85? t a = 0? t a = -40? 2.0 12 5 max778l shdn threshold voltage vs. input voltage and temperature 2.5 max777-8 input voltage (v) shdn threshold voltage (v) 3.0 3.5 34 1.5 0.5 1.0 7 6 t a = +125? t a = -55? t a = +25? 90 40 0.1 1 1000 max777l/max779l efficiency vs. load current 50 max777-1 load current (ma) efficiency (%) 60 70 80 10 100 30 v in = 4v v in = 2.5v v in = 1.8v v in = 1.5v v in = 1.1v v out = 5v 90 40 0.1 1 1000 max778l efficiency vs. load current 50 max777-2 load current (ma) efficiency (%) 60 70 80 10 100 30 v in = 2.5v v in = 1.8v v in = 1.5v v in = 1.1v v out = 3.3v or 3.0v 300 50 0.5 1.0 2.5 max777l/max779l maximum output current vs. input voltage 100 max777-4 input voltage (v) output current (ma) 150 200 250 1.5 2.0 0 v out = 5v 350 50 0.5 1.0 max778l maximum output current vs. input voltage 100 max777-5 input voltage (v) output current (ma) 150 200 250 1.5 2.0 0 v out = 3.3v 300 300 200 12 5 no-load supply current vs. voltage and temperature 220 max777-6 supply voltage (v) no-load supply current (?) 240 260 280 34 180 (switch = off) 120 140 160 100 7 6 t a = -40? t a = +25? t a = 0? t a = +85?
max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters _______________________________________________________________________________________ 5 a: i out , 200ma/div, 0ma to 200ma b: v out , 50mv/div, ac coupled max778l, v out = 3.3v, v in = 2.5v load-transient response a b 2ms/div _____________________________typical operating characteristics (continued) (circuit of figure 1, t a = +25?, unless otherwise noted.) a: v in , 1v/div, 1.8v to 3.3v b: v out , 100mv/div, ac-coupled, i out = 240ma max778l, v out = 3.3v line-transient response a b 2ms/div a: switch voltage (lx pin), 2v/div b: inductor current, 0.5a/div c: output voltage ripple, 50mv/div, ac coupled max777l, v in = 1.5v, i out = 100ma switching waveforms, continuous conduction a b c 0ma 5 m s/div a: switch voltage (lx pin), 2v/div b: inductor current, 0.5a/div c: output voltage ripple, 50mv/div, ac coupled max777l, v in = 3v, i out = 70ma switching waveforms, discontinuous conduction a b c 2 m s/div
max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters 6 _______________________________________________________________________________________ a: shdn, 2v/div b: v out , 1v/div v out = 3v max778l start-up time a b 10ms/div _____________________________typical operating characteristics (continued) (circuit of figure 1, t a = +25?, unless otherwise noted.) name function 1 ilim sets switch current-limit input. connect to in for 1a current limit. a resistor from ilim to in sets lower peak inductor currents. 2 in input from battery 3 agnd analog ground. not internally connected to pgnd. pin 4 pgnd power ground. must be low impedance; solder directly to ground plane or star ground. connect to agnd, close to the device. 5 lx collector of 1a npn power switch and emitter of active rectifier pnp. 6 out voltage output. connect filter capacitor close to pin. 7 shdn shutdown input disables power supply when low. also disconnects load from input. threshold is set at v in /2. 8 n.c. (max777l) no connect?ot internally connected. sel (max778l) selects the main output voltage. 3.3v when hard-wired to agnd, 3.0v when left open. ______________________________________________________________pin description fb (max779l) feedback input for adjustable-output operation. connect to an external voltage divider between v out and agnd.
_______________detailed description operating principle the max777l/max778l/max779l combine a switch- mode regulator with an npn bipolar switch, current limit, precision voltage reference, and active rectifier all in a single monolithic device. in shutdown mode, the internal rectifier is completely turned off and dis- connects the load from the source. only two external components are required in addition to the input bypass capacitor: a 22? inductor and a 100? filter capacitor. a minimum off-time, current-limited, pulse-frequency- modulation (pfm) control scheme combines the advan- tages of pulse width modulation (pwm) (high output power and efficiency) with those of a traditional pfm pulse skipper (low quiescent currents). external conditions (inductor value, load, and input volt- age) determine the way the converter operates, as follows: at light loads, the current through the inductor starts at zero, rises to a peak value, and drops down to zero in each cycle (discontinuous-conduction mode). in this case, the switching frequency is governed by a pair of one-shots that set a maximum on-time inversely propor- tional to v in [t on = 8.8/(v in - 0.25)] and a minimum off- time (1.3? for max777l/max779l and 2.3? for max778l). with a 22? inductor, lx? peak current is about 400ma and is independent of input voltage. efficiency at light loads is improved because of lower peak currents. at very light loads , more energy is stored in the coil than is required by the load in each cycle. the converter regulates by skipping entire cycles. efficiency is typically 65% to 75% in the pulse-skipping mode. pulse-skipping waveforms can be irregular, and the output waveform contains a low-frequency component. larger, low equiv- alent series resistance (esr) filter capacitors can help reduce the ripple voltage if needed. max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters _______________________________________________________________________________________ 7 max778l delay timer t off delay timer t on vref 0.2025v shutdown control shdn 7 active rectifier rectifier control out pgnd agnd 3 sel 8 4 6 100 m f v out 100 m f v in 22 m h r lim switch driver lx ilim in 21 1 : n figure 1. max778l block diagram
max777l/max778l/max779l at heavy loads above approximately 100ma, the con- verter enters continuous-conduction mode, where cur- rent always flows in the inductor. the switch-on state is controlled cycle-by-cycle by either the maximum t on time or the switch? preset current limit. as a result, the switch's current rating is not exceeded and the inductor is not saturated. at very heavy loads, the inductor cur- rent self-oscillates between this peak current limit and some lower value governed by the minimum off-time, the inductance value, and the input/output differential. with ilim shorted to in, the peak switch current of the internal npn power switch is set to 1a. the peak switch current can be set to a lower value by connecting a resistor between ilim and in (see current limit sec- tion). this enables the use of physically smaller induc- tors with lower saturation-current ratings. at 1a, the switch voltage drop (v sw ) is about 500mv. v sw decreases to about 250mv at 0.1a. conventional pwm converters generate constant-fre- quency switching noise, while this architecture pro- duces variable-frequency switching noise. however, the noise does not exceed the current limit times the fil- ter-capacitor esr, unlike conventional pulse-skippers. step-down mode if the input voltage exceeds the output voltage, the max777l/max778l/max779l behave as ?witched linear regulators. if the output voltage starts to drop, the switch turns on and energy is stored in the coil, as in normal step-up mode. after the switch turns off, the voltage at lx flies high. the active rectifier turns on when lx rises above v in . as in a linear regulator, the voltage difference between v in and v out appears across the rectifier (actually a pnp transistor) until the current goes to zero and the rectifier turns off. at high v in to v out differentials, the maximum load current is limited by the maximum allowable power dissipation in the package. for fully specified buck/boost converters, refer to the data sheet for the pin-compatible max877l/max878l/max879l. active rectifier the internal active rectifier of the max777l/max778l/ max779l replaces the external schottky catch diode in normal boost operation. the rectifier consists of a pnp pass transistor and a unique control circuit which, in shutdown mode, entirely disconnects the load from the source. this is a distinct advantage over standard boost topologies, since it prevents battery drain in shut- down. the active rectifier also acts as a zero-dropout regulator if the input exceeds the regulated output. this allows the max777l/max778l/max779l to act as buck/boost converters. useful in battery-powered applications, where the battery voltage may initially exceed the output voltage, the converters will regulate down to the output voltage and seamlessly switch into boost mode as the input drops below the output voltage. the pin-compati- ble max877l/max878l/max879l are fully specified buck/boost converters with higher specified output cur- rents than the max777l/max778l/max779l. shutdown shutdown ( shdn ) is a high-impedance, active-low input. connect shdn to v in for normal operation. keeping shdn at ground holds the converters in shut- down mode. since the active rectifier is turned off in shutdown mode, the path from input to load is cut, and the output effectively drops to 0v. the supply current in the shutdown state ranges from 4? at v in = 1v to 50? at v in = 4.5v. the shutdown circuit threshold is set nominally to v in /2 + 250mv. when shdn is below this threshold, the device is shut down and is enabled with shdn above the threshold. when driven from external logic, shdn can be driven to a higher voltage than v in . current limit connecting ilim to in sets an lx current limit of 1a. for smaller output power levels that do not require the max- imum peak current, the peak inductor current can be reduced to optimize overall efficiency and to allow very small, low-cost coils with lower current ratings. see also the inductor selection section. reduce the max777l/max778l/max779l peak induc- tor current by connecting a resistor between ilim and in. see figure 2 to select the resistor. low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters 8 _______________________________________________________________________________________ 600 0 28 current-limit resistor vs. peak inductor current 800 max777-fg02 resistor value (k w ) peak inductor current (ma) 1000 1200 46 400 0 200 12 14 10 v in = 2.5v figure 2. current-limit resistor vs. current limit
output voltage selection the output voltage of the max777l is fixed at 5v. the max778l output voltage can be set to 3v by leaving the sel pin open. connect sel to agnd for 3.3v operation. the max779l? output voltage is set by two resistors, r1 and r2 (figure 3), which form a voltage divider between the output and the fb pin. the output voltage can be set from 2.5v to 6.0v by the equation: v out = (0.2025) [(r1 + r2)/r2] to simplify the resistor selection: r1 = (r2)[(v out /0.2025) - 1] since the input current at fb is 40na maximum, large val- ues (10k to 50k for r2) can be used with no significant loss of accuracy. for 1% error, the current through r2 should be at least 100 times fb? bias current. when large values are used for the feedback resistors (r1 > 50k ), stray output impedance at fb can add ?ag?to the feedback response, destabilizing the regula- tor and creating a larger ripple at the output. lead lengths and circuit board traces at the fb node should be kept short. reduce ripple by adding a ?ead?compensa- tion capacitor (c3, 100pf to 50nf) in parallel with r1. __________applications information the typical operating circuit shows a max777l step- up application circuit. this circuit starts up and oper- ates with inputs ranging from 1.0v to 4.5v. start-up time is a function of the load, typically less than 5ms. output current capability is a function of the input voltage. see typical operating characteristics . inductor selection the 22? inductor shown in the typical operating circuit is sufficient for most max777l/max778l/ max779l designs. other inductor values ranging from 10? to 47? are also suitable. the inductor should have a saturation rating equal to or greater than the peak switch-current limit, which is 1a without an exter- nal current limit (ilim connected to in). it is acceptable to operate the inductor at 120% of its saturation rating; however, this will reduce efficiency. for highest effi- ciency, use an inductor with a low dc resistance , preferably under 0.2 . table 1 lists suggested inductor suppliers. capacitor selection the 100?, 10v surface-mount tantalum (smt) output capacitor shown in the typical operating circuit will provide a 20mv output ripple or less, stepping up from 2v to 3.3v at 200ma. smaller capacitors, down to 10?, are acceptable for light loads or in applications that tol- erate higher output ripple. the input capacitor may be omitted if the input lead length is less than 2 inches (5cm) or if the loads are small. the primary factor in selecting both the output and input filter capacitor is low esr. the esr of both bypass and filter capacitors affects efficiency. optimize performance by increasing filter capacitors or using specialized low-esr capacitors. the smallest low-esr smt tantalum capacitors currently available are sprague 595d or 695d series. sanyo os-con organic semiconductor through-hole capacitors also exhibit very low esr, are rated for the wide temperature range, and are particularly useful for operation at cold temper- atures. table 1 lists suggested capacitor suppliers. layout the max777l/max778l/max779l? high peak currents and high-frequency operation make pc layout impor- tant for minimum ground bounce and noise. locate input bypass and output filter capacitors close to the device pins. all connections to the fb pin (max779l) should also be kept as short as possible. a ground plane is recommended. solder agnd (pin 3) and pgnd (pin 4), directly to the ground plane. refer to the max777l/max778l/max779l evaluation kit (ev kit) manual for a suggested surface-mount layout. max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters _______________________________________________________________________________________ 9 shdn pgnd max779l out agnd 7 1 3 4 8 6 li 22 m h 5 lx fb 2 in ilim v in c1 22? r1 c3 c2 100? v out r2 figure 3. max779l adjustable voltage
max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters 10 ______________________________________________________________________________________ table 1. component suppliers production method inductors capacitors miniature through-hole sumida rch654-220 low-cost through-hole nichicon pl series low-esr electrolytic united chemi-con, lxf series surface mount sprague 595d sprague 695d matsuo 267 series avx tps series sumida cd54-220 (22?) murata-erie lqhyn1501k04m00-d5 (15?) coiltronics ctx20-1 coilcraft pch-27-223 sanyo os-con low-esr organic semiconductor avx usa: (803) 946-0690 (800) 282-4975, fax (803) 626-3123 coiltronics usa: (561) 241-7876, fax (561) 241-9339 matsuo usa: (714) 969-2491, fax (714) 960-6492 murata-erie usa: (814) 237-1431 (800) 831-9172, fax (814) 238-0490 nichicon usa: (847) 843-7500 sanyo usa: (619) 661-6835, fax (847) 843-2798 japan: (81) 7-2070-6306, fax (81) 7-2070-1174 sprague usa: (603) 224-1961, fax (603) 224-1430 sumida usa: (847) 956-0666, fax (847) 956-0702 japan: (81) 3-3607-5111, fax (81) 3-3607-5144 united chemi-con usa: (714) 255-9500, fax (714) 255-9400
___________________chip topography max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters ______________________________________________________________________________________ 11 transistor count: 170; substrate connected to agnd. shdn out in agnd pgnd ilim vref fb lx 0.084" (2.134mm) 0.068" (1.727mm) _ordering information (continued) part temp. range pin-package max778l cpa 0? to +70? 8 plastic dip max778lcsa 0? to +70? 8 so max778lc/d 0? to +70? dice* max778lmja -55? to +125? 8 cerdip** max778lesa -40? to +85? 8 so max778lepa -40? to +85? 8 plastic dip max779l cpa 8 plastic dip max779lcsa 0? to +70? 8 so max779lc/d 0? to +70? dice* max779lepa -40? to +85? 8 plastic dip max779lesa -40? to +85? 8 so max779lmja -55? to +125? 8 cerdip** 0? to +70? * dice are specified at t a = +25?, dc parameters only. **contact factory for availability and processing to mil-std-883.
max777l/max778l/max779l low-voltage input, 3v/3.3v/5v/ adjustable output, step-up dc-dc converters ________________________________________________________package information dim a a1 a2 a3 b b1 c d1 e e1 e ea eb l min ? 0.015 0.125 0.055 0.016 0.045 0.008 0.005 0.300 0.240 0.100 0.300 ? 0.115 max 0.200 ? 0.175 0.080 0.022 0.065 0.012 0.080 0.325 0.310 ? ? 0.400 0.150 min ? 0.38 3.18 1.40 0.41 1.14 0.20 0.13 7.62 6.10 2.54 7.62 ? 2.92 max 5.08 ? 4.45 2.03 0.56 1.65 0.30 2.03 8.26 7.87 ? ? 10.16 3.81 inches millimeters plastic dip plastic dual-in-line package (0.300 in.) dim d d d d d d pkg. p p p p p n min 0.348 0.735 0.745 0.885 1.015 1.14 max 0.390 0.765 0.765 0.915 1.045 1.265 min 8.84 18.67 18.92 22.48 25.78 28.96 max 9.91 19.43 19.43 23.24 26.54 32.13 inches millimeters pins 8 14 16 18 20 24 c a a2 e1 d e ea eb a3 b1 b 0?- 15 a1 l d1 e 21-0043a dim a a1 b c e e h l min 0.053 0.004 0.014 0.007 0.150 0.228 0.016 max 0.069 0.010 0.019 0.010 0.157 0.244 0.050 min 1.35 0.10 0.35 0.19 3.80 5.80 0.40 max 1.75 0.25 0.49 0.25 4.00 6.20 1.27 inches millimeters 21-0041a narrow so small-outline package (0.150 in.) dim d d d min 0.189 0.337 0.386 max 0.197 0.344 0.394 min 4.80 8.55 9.80 max 5.00 8.75 10.00 inches millimeters pins 8 14 16 1.27 0.050 l 0?8 h e d e a a1 c 0.101mm 0.004in. b 12 ______________________________________________________________________________________

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